HomeMy WebLinkAbout2022-06-21; Municipal Water District; ; Approval of the 2022 Annual Water Shortage Assessment Report and authorization of submittal to the California Department of Water ResourcesCA Review _RMC_
Meeting Date: June 21, 2022
To: President and Board Members
From: Scott Chadwick, Executive Manager
Staff Contact: Keri Martinez, Utilities Senior Engineer
keri.martinez@carlsbadca.gov, 442-339-2354
Shoshana Aguilar, Senior Management Analyst
shoshana.aguilar@carlsbadca.gov, 442-339-2360
Subject: Approval of the 2022 Annual Water Shortage Assessment Report and
authorization of submittal to the California Department of Water
Resources
Districts: All
Recommended Action
Adopt a resolution approving the 2022 Annual Water Shortage Assessment Report, authorizing
submittal of the assessment to the California Department of Water Resources and granting
authority to the Executive Manager to incorporate requested revisions, if any, made by the
Carlsbad Municipal Water District Board of Directors into the report prior to submitting to the
Department of Water Resources by July 1, 2022.
Executive Summary
California Water Code section 10632.1 requires urban water suppliers to conduct an annual
water supply and demand assessment and submit this data in an annual water shortage
assessment report. The report projects demand for the period from July 1, 2022, to June 30,
2023. The 2022 annual report, which is provided as Attachment A to Exhibit 1, must be
submitted to the Department of Water Resources on or before July 1, 2022, and annually
thereafter. The Carlsbad Municipal Water District is an urban water supplier subject to this new
requirement and must submit the results of this annual assessment for the first time this year.
The purpose of the annual assessment is to determine whether anticipated water supplies will
adequately meet anticipated demands under current and dry year conditions. The assessment
is intended as a tool to assist with local and statewide water supply planning to address water
shortages.
CMWD’s annual assessment indicates that the current supplies would adequately meet the
demands in fiscal year 2022-23. To comply with requirements established in CMWD’s Water
Shortage Contingency Plan, the 2022 annual report must be approved by the CMWD Board of
Directors.
June 21, 2022 Item #6 Page 1 of 22
MUNICIIPAL WATER D IISTRIC'f
Staff Report
Discussion
The CMWD board approved the district’s Water Shortage Contingency Plan concurrent with
approval of the 2020 Urban Water Management Plan on June 8, 2021. The water shortage
response actions in the contingency plan determine how to address identified water shortages.
Suppliers use their water supply and demand assessment procedures from the contingency
plan, along with supporting information from their management plan to conduct annual supply
and demand assessments to predict potential shortages and submit the results in an annual
report to the Department of Water Resources.
Information in the report includes anticipated demands based on historical uses, anticipated
supplies based on current sources, any identified shortages, triggered shortage response
actions, compliance and enforcement actions, and communication actions consistent with the
supplier’s contingency plan.
Estimated water demand projections are based on past and current years data and demands
are inclusive of residential, commercial, industrial, institutional, agricultural, irrigation and fire
protection monthly uses. Since the Department of Water Resources requires these demands to
represent a dry year, an additional 7% of water use is added to the demand in accordance with
the approved management plan procedures. Demands also include estimates for expected
water distribution system losses based on historical data. While Drought Level 1 actions have
been and will continue to be implemented, the total projected demand for fiscal year 2022–23
without drought restrictions is 21,549 acre-feet.
CMWD’s projected supplies include:
• 14,804 acre-feet potable water purchased from the Water Authority
• 2,500 acre-feet desalinated seawater purchased from the Water Authority
• 4,245 acre-feet of recycled water total from CMWD’s two recycled water sources, the
Carlsbad Water Recycling Facility and the Vallecitos Water District
CMWD’s assessment indicates adequate supplies are available to meet customer demands
under the Department of Water Resources’ scenarios for dry year conditions. While it is not
required to meet anticipated demands, CMWD will implement additional conservation
measures as required by the State Water Resources Control Board (i.e., demand reduction
actions for water shortage Level 2) when necessary for regulatory compliance, which would
likely reduce demands further.
Options
Staff provide the following options for the CMWD board’s consideration:
1. Adopt a resolution approving the 2022 Annual Water Shortage Assessment Report and
authorizing submittal of the assessment to the California Department of Water
Resources and granting authority to the Executive Manager to incorporate requested
revisions, if any, made by the Carlsbad Municipal Water District Board of Directors into
the report prior to submitting to the Department of Water Resources by July 1, 2022.
Pros
• CMWD will have a completed Annual Water Supply and Demand Assessment
• CMWD will comply with state law
• The CMWD Board can comment on the 2022 annual report and still meet the
submittal deadline
June 21, 2022 Item #6 Page 2 of 22
Cons
•If the Board requests changes to the report, the CMWD Board will not have the
opportunity to review the final document prior to the submittal deadline
2.Adopt a resolution approving the 2022 annual report and authorizing submittal to the
Department of Water Resources.
Pros
•CMWD will have a completed annual water supply and demand assessment
•CMWD will comply with state law
Cons
•If the CMWD Board requests changes to the report, the document would need to
come back to the Board for approval and CMWD would not be able to comply
with the regulatory deadline of submittal by July 1, 2022.
Staff recommend Option 1 for the board’s consideration.
Fiscal Analysis
The 2022 annual report has no financial impact although the projects and policies that may
develop from its findings may have a financial impact. These impacts will be disclosed and
brought before the CMWD board for consideration as the projects or policies are identified or
implemented.
Next Steps
With the CMWD board’s approval, staff will submit the 2022 annual report to the Department
of Water Resources.
Environmental Evaluation
The proposed action is exempt from California Environmental Quality Act under the California
Environmental Quality Act Guidelines Section 15282 (v), which applies to the preparation and
adoption of an annual water supply and demand assessment in accordance with the provisions
of Section 10652 of the California Water Code.
Public Notification
This item was noticed in accordance with the Ralph M. Brown Act and was available for public
viewing and review at least 72 hours prior to the scheduled meeting date.
Exhibits
1.Carlsbad Municipal Water District board resolution
June 21, 2022 Item #6 Page 3 of 22
RESOLUTION NO. 1676
A RESOLUTION OF THE BOARD OF DIRECTORS OF THE CARLSBAD
MUNICIPAL WATER DISTRICT, APPROVING THE 2022 ANNUAL WATER
SHORTAGE ASSESSMENT REPORT, AUTHORIZING SUBMITTAL OF THE
ASSESSMENT TO THE CALIFORNIA DEPARTMENT OF WATER RESOURCES
AND GRANTING AUTHORITY TO THE EXECUTIVE MANAGER TO
INCORPORATE REQUESTED REVISIONS, IF ANY, MADE BY THE CARLSBAD
MUNICIPAL WATER DISTRICT BOARD OF DIRECTORS INTO THE REPORT
PRIOR TO SUBMITTING TO THE DEPARTMENT OF WATER RESOURCES
EXHIBIT 1
WHEREAS, California Water Code 10632.1 requires urban water suppliers to conduct an annual
water supply and demand assessment and submit this data in an Annual Water Shortage Assessment
Report to the California Department of Water Resources on or before July 1, 2022, and annually
thereafter; and
WHEREAS, the Carlsbad Municipal Water District, or CMWD, is an urban water supplier subject
to this new requirement and must submit the results of this annual assessment for the first time this
year; and
WHEREAS, the purpose of this annual water supply and demand assessment is to determine
whether anticipated current water supplies will adequately meet anticipated demands under current
and dry year conditions and to assist with local and statewide water supply planning on how to address
water shortages; and
WHEREAS the annual water supply and demand assessment determined that anticipated
current water supplies will meet anticipated demands under current and dry year conditions; and
WHEREAS, the city planner has determined that the Project is statutorily exempt from the
proceedings of the California Environmental Quality Act (CEQA) pursuant to state CEQA Guidelines
Article 18, Section 15282 -(v) The preparation and adoption of an annual water supply and demand
assessment pursuant to the provision of Section 10652 of the Water Code.
NOW, THEREFORE, BE IT RESOLVED by the Carlsbad Municipal Water District Board of the City
of Carlsbad, California, as follows:
1.That the above recitations are true and correct.
2.That the Board approves the 2022 Annual Water Shortage Assessment Report attached
hereto as Attachment A and hereby delegates authority to the Executive Manager to
June 21, 2022 Item #6 Page 4 of 22
incorporate requested revisions made at the June 21, 2022 meeting by the Board, if any,
as outlined in the meeting minutes, into the report.
3.That the Executive Manager is hereby authorized and directed to submit the 2022
Annual Water Shortage Assessment Report to the California Department of Water
Resources.
PASSED, APPROVED AND ADOPTED at a Regular Meeting of the Board of Directors of the
Carlsbad Municipal Water District of the City of Carlsbad on the 21st day of June, 2022, by the following
vote, to wit:
AYES:
NAYS:
ABSENT:
Hall, Blackburn, Bhat-Patel, Acosta, Norby.
None.
None.
MATT HALL, President
°,fY FAVIOLA MEDINA, City Clerk Services Manager
(SEAL)
June 21, 2022 Item #6 Page 5 of 22
jqvL
Attachment A
9655 Chesapeake Drive Suite 320
San Diego, California 92123
ANNUAL WATER SHORTAGE ASSESSMENT REPORT
Carlsbad Municipal Water District May 2022
June 21, 2022 Item #6 Page 6 of 22
Carlsbad -
Municipal Water District
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TABLE OF CONTENTS
SECTION PAGE NO.
EXECUTIVE SUMMARY ........................................................................................................................... ES-1
1. INTRODUCTION ................................................................................................................................. 1
1.1 Definitions .............................................................................................................................................................. 1 1.2 Decision Making Process ................................................................................................................................. 1
2. DATA INPUTS ..................................................................................................................................... 4
2.1 Current Year Unconstrained Demand ......................................................................................................... 4 2.2 Next Year Unconstrained Demand............................................................................................................... 4 2.3 Current Year Available Supply ....................................................................................................................... 7 2.4 Next Year Available Supply ............................................................................................................................. 7 2.5 Infrastructure Capabilities ..............................................................................................................................10 2.6 Assessment Methodology .............................................................................................................................10 2.7 Description and Quantification of Each Water Supply Source .......................................................10
3. RELIABILITY ANALYSIS AND ACTIONS .......................................................................................... 11
3.1 Supply and Demand Assessment ...............................................................................................................11 3.2 Planned Shortage Response Actions ........................................................................................................14
4. REFERENCES ..................................................................................................................................... 15
TABLES
Table 1: Annual Assessment Information Table 2: Unconstrained Current Year FY 21-22 Water Demands (DWR Table 2: Water Demand) Table 3: Unconstrained Next Year FY 22-23 Estimated Water Demands (DWR Table 2: Water Demand) Table 4: Current Year Water FY 21-22 Supply (DWR Table 3: Water Supplies) Table 5: Next Year FY 22-23 Projected Water Supply (DWR Table 3: Water Supplies) Table 6: Potable Water Demand Supply Assessment (DWR Table 4(P): Potable Water Shortage Assessment) Table 7: Recycled Water Demand Supply Assessment (DWR Table 4(NP): Non-Potable Water Shortage Assessment) Table 8: Water Conservation Actions (DWR Table 5: Planned Water Shortage Response Actions)
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EXECUTIVE SUMMARY
This Water Shortage Assessment Report has been prepared for the Carlsbad Municipal Water District (CMWD) in compliance with the requirements of California Water Code (CWC) §10632. This preliminary report will be submitted to the California Department of Water Resources (DWR) by June 1, 2022, in accordance with Executive Order N-7-22. The report will then be finalized and submitted to DWR no later than July 1, 2022, in accordance with the CWC §10632.1. This report compares the monthly estimated water demand to available projected supply between July 2022 and June 2023 for CMWD, to assist with predicting shortages in the coming year. Consistent with guidance provided by the California Department of Water Resources (DWR) (2021), the next year has been assumed to be dry. With ongoing implementation of water conservation measures listed in Level 1 of CMWD’s drought ordinance, and continued reliance on water purchases from the San Diego County Water Authority, CMWD expects to have a supply surplus over the next year even in dry year conditions. In addition, this report presents the expected water conservation savings from Level 2 of CMWD’s drought ordinance in order to demonstrate that compliance with Executive Order N-7-22 to implement a Statewide Standard Shortage Level 2 over the next year would be feasible.
1.INTRODUCTION
This Annual Water Shortage Assessment Report includes both the Annual Water Supply Demand Assessment and the Water Shortage Response Actions of Carlsbad Municipal Water District (CMWD) as of July 1, 2022.
1.1 Definitions
This assessment makes use of the following terms, as defined here.
Current Year – The Current Year is defined as the twelve-month period between July 1, 2021 and June 30, 2022.
Next Year – The Next Year is defined as the twelve-month period between July 1, 2022 and June 30, 2023.
Dry Year – For the purposes of this 2022 Annual Water Shortage Assessment Report, the Dry Year is the first year of a multi-dry year period between July 1, 2022 and June 30, 2023.
Unconstrained Demand – Water demand absent any water supply restrictions.
1.2 Decision Making Process
The California Water Code (CWC Section 10632(a)(2)) requires that each urban water supplier include in its Water Shortage Contingency Plan (WSCP) a description of the written decision-making process that the supplier will use each year to determine its water supply reliability.
The procedure for conducting and approving the annual demand and supply reliability assessment can be found in CMWD’s WSCP, which is a part of its 2020 Urban Water Management Plan (UWMP), Section 8.2. According to the WSCP, the annual reliability assessment procedure includes the following steps and annual timing. However, the procedure this year has the additional step of submitting a preliminary assessment to DWR on or before June 1, 2022. Therefore, the following decision-making process has been modified from that in the WSCP, to accommodate this change.
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1. March - April
a. CMWD determines CMWD local supply available.
b. CMWD coordinates with the San Diego County Water Authority (SDCWA) to gather necessary information to conduct SDCWA Annual Assessment.
c. CMWD conducts Annual Assessment (previously scheduled for May in WSCP):
i. CMWD determines total supply available – inclusive of imported water supply.
ii. CMWD determines infrastructure constraints (including water quality conditions limiting local sources).
iii. CMWD determines expected demand for current year and one subsequent dry year.
iv. CMWD compares supply and demand and makes a determination of the water supply reliability (see Section 8.2.6 Evaluation Criteria).
2. May
a. SDCWA announces member agency allocation determination for current year.
b. SDCWA determines carryover (and emergency storage apportionments if under emergency).
3. June
a. CMWD submits preliminary Annual Assessment to the state by June 1 (new addition to process).
b. Board of Directors reviews and approves Annual Assessment determination.
c. CMWD coordinates with SDCWA on submittal of the report. Annual Assessment report to be submitted to the state by July 1.
The following table summarizes the 2022 Annual Assessment information.
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Table 1: Annual Assessment Information
Annual Assessment Information (Required)
Year Covered By This Shortage Report
Start: July 1,2022
End: June 30,2023
Supplier's Annual Assessment Planning Cycle
Start Month:July
End Month:June
Data Reporting Interval Used: MONTHLY
Volume Unit for Reported Supply and Demand:
(Must use the same unit throughout)AF
Water Supplier's Contact Information
Water Supplier's Name:Carlsbad Municipal Water District
Contact Name:Keri Martinez
Contact Title:Utilities Senior Engineer
Street Address:5950 El Camino Real
ZIP Code:92008
Phone Number:442-339-2354
Email Address:keri.martinez@carlsbadca.gov
Report Preparer's Contact Information
(if different from above)
Preparer's Organization Name: Woodard & Curran
Preparer's Contact Name: Haley Johnson
Phone Number:(858) 875-7407
Email Address:HJohnson@woodardcurran.com
Supplier's Water Shortage Contingency Plan
WSCP Title CMWD UWMP 2020 Chapter 8 Water Shortage Contingency Planning
WSCP Adoption Date 6/8/2021
Other Annual Assessment Related Activities (Optional)
Activity Timeline/ Outcomes / Links / Notes
Annual Assessment/ Shortage Report Title: 2022 Annual Water Shortage Assessment Report
Annual Assessment / Shortage Report Approval Date:expected 06/07/2022
Water Shortage Contingency Plan adopted 6/8/2021
2022 preliminary Annual Water Shortage Assessment
Report to be submitted to the state
expected 6/1/2022, following availability of submittal procedure
guidance from DWR
2022 Annual Water Shortage Assessment Report to be
submitted to the state
expected 6/30/2022, when 2022 Annual Water Shortage Assessment
finalized following Board approval
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2. DATA INPUTS
2.1 Current Year Unconstrained Demand
As required by the California Water Code (CWC Section 10632(a)(2)(B)(i)), CMWD has estimated the current year’s unconstrained demand for the purpose of determining currently needed water shortage response actions. In the current year, July 2021 – June 2022, CMWD implemented water conservation practices from Level 1 Drought Watch of its Drought Ordinance to achieve at least a 10% reduction in water demand.
Unconstrained demand in the current year, which is presented in Table 2, represents potable water sales, including water losses, between July 2021 and June 2022, with the addition of the hypothetical demand that would have existed were it not for the current year water use conservation practices. CMWD water loss reports between 2018 to 2020 were used to estimate water loss in 2021 and 2022. Historical average annual water loss as a percentage of annual potable water sales was used to approximate water loss on a monthly basis in the current year and the next year for the purposes of this report. Unconstrainted recycled water demand in the current year is simply recycled water sales between July 2021 and June 2022 because the Level 1 Drought Water conservation practices only apply to potable demand. Water sales in May and June of 2022 were not yet available as of the drafting of this report and were therefore estimated based on the recent historical average May and June water sales between 2019 and 2021. The hypothetical demand that would have existed were it not for current water conservation practices was estimated based on the savings CMWD estimated it would achieve from Level 1 Drought Watch (see 2020 CMWD UWMP Table 8.4).
2.2 Next Year Unconstrained Demand
CMWD assumes that demand in the next year (July 2022 – June 2023) will be representative of a single dry year as defined in Section 7 Supply Reliability Assessment of CMWD’s 2020 UWMP, consistent with the methodology used to evaluate water supply reliability, as described in CMWD’s WSCP (see Section 8.2.3 of the 2020 CMWD UWMP). Unconstrained next year demand, which is shown in Table 3, represents unconstrained demand in the current year multiplied by the expected demand increase during a dry year. Demand in a dry year is expected to be 107% of normal for both potable and recycled water. This factor is explained in greater detail in the 2020 CMWD UWMP Section 7.2 Reliability by Year Type and is based on regional demand modeling conducted by the San Diego County Water Authority, the regional wholesaler.
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Table 2: Unconstrained Current Year FY 21-22 Water Demands (DWR Table 2: Water Demand)
Use Type Start Year:2021 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total by Water
Demand Type
All Demands Potable Demand 1353.2 1433.5 1410.9 1295.1 1105.1 1131.1 859.8 899.9 987.8 1068.2 1071.4 1223.9 13840
Other Potable
Additional
hypothetical
demand w/o
conservation
172.4 182.6 179.7 165.0 140.8 144.1 109.5 114.6 125.8 136.1 136.5 155.9 1763
Losses Estimated water loss 55.7 59.0 58.1 53.3 45.5 46.6 35.4 37.0 40.7 44.0 44.1 50.4 570
1581 1675 1649 1513 1291 1322 1005 1052 1154 1248 1252 1430 16172
Other Nonpotable Recycled Water Tertiary 470.8 505.0 513.1 449.9 275.9 321.9 108.2 142.2 249.3 257.2 290.4 383.3 3967
471 505 513 450 276 322 108 142 249 257 290 383 3967
Table 2: Water Demands1
Projected Water Demands - Volume3
Total by Month (Non-Potable)
1Projections are based on best available data at time of submitting the report and actual demand volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Demand in the Table Instructions.
Notes: This table reflects current year demands.
Total by Month (Potable)
Additional
Description
(as needed)
Level of
Treatment
for Non-
Potable
Supplies
Drop-down
list
Drop-down list
May select each use multiple times
These are the only Use Types that will
be recognized by the WUEdata online
submittal tool
(Add additional rows as needed)
Demands Served by Potable Supplies
Demands Served by Non-Potable SuppliesJune 21, 2022Item #6 Page 12 of 22"E ~ ro i.. "'C lo.. o:::::s OU 3:..s
Carlsbad Municipal Water District 6 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
Table 3: Unconstrained Next Year FY 22-23 Estimated Water Demands (DWR Table 2: Water Demand)
Use Type Start Year:2022 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total by Water
Demand Type
All Demands Potable Demand 1447.9 1533.8 1509.6 1385.8 1182.4 1210.3 920.0 962.9 1057.0 1142.9 1146.4 1309.6 14809
Other Potable
Additional
hypothetical
demand w/o
conservation
184.4 195.4 192.3 176.5 150.6 154.2 117.2 122.6 134.6 145.6 146.0 166.8 1886
Losses Estimated water loss 59.6 63.1 62.1 57.0 48.7 49.8 37.9 39.6 43.5 47.0 47.2 53.9 609
1692 1792 1764 1619 1382 1414 1075 1125 1235 1336 1340 1530 17304
Other Nonpotable Recycled Water Tertiary 503.8 540.3 549.0 481.4 295.2 344.5 115.8 152.2 266.8 275.2 310.7 410.1 4245
504 540 549 481 295 344 116 152 267 275 311 410 4245
Table 2: Water Demands1
Projected Water Demands - Volume3
Total by Month (Non-Potable)
1Projections are based on best available data at time of submitting the report and actual demand volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Demand in the Table Instructions.
Notes: CMWD has been in Level 1 Drought Watch since 2017.
Total by Month (Potable)
Additional
Description
(as needed)
Level of
Treatment
for Non-
Potable
Supplies
Drop-down
list
Drop-down list
May select each use multiple times
These are the only Use Types that will
be recognized by the WUEdata online
submittal tool
(Add additional rows as needed)
Demands Served by Potable Supplies
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Carlsbad Municipal Water District 7 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
2.3 Current Year Available Supply
As required by the California Water Code (CWC Section 10632(a)(2)(B)(ii)), CMWD estimated the available supply in the current year and one dry year, presented in Table 4 and Table 5, respectively. Available supply includes local supplies, including recycled and desalinated water, and imported supplies purchased from the SDCWA. Note that current year available supply (Table 4) is less than current year unconstrained demand (Table 2) due to the Level 1 Drought Watch conservation practices implemented in CMWD’s service area between July 2021 and June 2022, and there was no shortage experienced in the Current Year.
2.4 Next Year Available Supply
CMWD has estimated available supply in the next year, which is assumed to be a single dry water year, as specified in the WSCP, Section 8.2.3 Planned Water Use for Current Year and Subsequent Dry Year: Data Inputs and Methodology. Available supply in the next year (Table 5), represents expected supply during a dry year. Available supply in a dry year is expected to be 100% of normal for desalinated seawater, 107% of normal for recycled water, and the rest would be supplied by purchases from the SDCWA. SDCWA’s 2020 UWMP indicates sufficient available supplies to meet member agency unconstrained demands in single and multiple dry year scenarios, even without member agencies implementing additional conservation measures from their WSCPs. As such, CMWD does not anticipate any issues accessing needed supplies to meet projected next year demands. These factors are explained in greater detail in UWMP Section 7.2 Reliability by Year Type.
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Table 4: Current Year Water FY 21-22 Supply (DWR Table 3: Water Supplies)
Water Supply Start Year:2021 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun
Total by
Water
Supply Type
Purchased or Imported Water SDCWA 1200.6 1284.1 1260.6 1140.1 942.2 969.3 686.9 728.6 820.1 903.8 907.1 1065.9 11909 --Desalinated Surfacewater Seawater 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 2500 --1409 1492 1469 1348 1151 1178 895 937 1028 1112 1115 1274 14409 0
Recycled Water 470.8 505.0 513.1 449.9 275.9 321.9 108.2 142.2 249.3 257.2 290.4 383.3 3967 Tertiary --
471 505 513 450 276 322 108 142 249 257 290 383 3967 0
Potable Supplies
Non-Potable Supplies
1Projections are based on best available data at time of submitting the report and actual supply volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Supplies in the Table Instructions.
Notes: CMWD did not experience hydrological and regulatory conditions, infrastructure capabilities, or constraints impacted water supplies in the current year.
Total by Month (Potable)
Total by Month (Non-Potable)
Table 3: Water Supplies1
Projected Water Supplies - Volume3
Water
Quality
Drop-down
List
Total Right
or Safe
Yield*
(optional)
Additional
Detail on
Water Supply
Drop-down List
May use each category multiple
times.These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
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Carlsbad Municipal Water District 9 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
Table 5: Next Year FY 22-23 Projected Water Supply (DWR Table 3: Water Supplies)
Water Supply Start Year:2022 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Total by Water
Supply Type
Purchased or Imported Water SDCWA 1483.6 1583.9 1555.7 1411.0 1173.4 1205.9 866.7 916.9 1026.7 1127.2 1131.2 1321.9 14804Desalinated Surfacewater Seawater 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 208.3 25001692 1792 1764 1619 1382 1414 1075 1125 1235 1336 1340 1530 17304 0
Recycled Water 503.8 540.3 549.0 481.4 295.2 344.5 115.8 152.2 266.8 275.2 310.7 410.1 4245 Tertiary
504 540 549 481 295 344 116 152 267 275 311 410 4245 0
Potable Supplies
Non-Potable Supplies
1Projections are based on best available data at time of submitting the report and actual supply volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When opting to provide other than monthly volumes (bi-monthly, quarterly, or annual), please see directions on entering data for Projected Water Supplies in the Table Instructions.
Notes: CMWD does not expect upcoming infrastructure changes, such as scheduled operation and maintenance, construction impacts, water quality impacts, or projects that may add capacity, that may affect
supply in the next year.
Total by Month (Potable)
Total by Month (Non-Potable)
Table 3: Water Supplies1
Projected Water Supplies - Volume3
Water
Quality
Drop-down
List
Total Right
or Safe
Yield*
(optional)
Additional
Detail on
Water Supply
Drop-down List
May use each category multiple
times.These are the only water
supply categories that will be
recognized by the WUEdata online
submittal tool
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Carlsbad Municipal Water District 10 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
2.5 Infrastructure Capabilities
The California Water Code (CWC Section 10632(a)(2)(B)(iii)) requires urban water suppliers to provide a description of the existing infrastructure capabilities and plausible constraints used to evaluate water supply reliability. CMWD’s existing infrastructure is capable of meeting expected potable and recycled water demands. As documented in Section 4.2 of CMWD’s 2020 UWMP, a relatively modest increase in demands is anticipated within its service area between 2020 and 2025, and CMWD’s conveyance system is adequately sized to meet potable demands. CWMD meets potable demand with desalinated seawater wheeled through SDCWA and purchased treated water from SDCWA; additional treatment and conveyance infrastructure would not be needed to meet the expected increase in potable demands. Although in the past, CMWD’s recycled water treatment facility, the Carlsbad Water Reclamation Facility (WRF), has produced on average around 4,000 AFY of tertiary treated water, it is capable of producing up to 7.0 MGD (equivalent to approximately 7,800 AFY) of tertiary treated water (see 2020 CMWD UWMP Section 6.7.2). CMWD also has an agreement with Vallecitos Water District to supplement recycled water purchases. The Carlsbad WRF receives secondary treated effluent from the Encina Water Pollution Control Facility (WPCF), which, in 2020 treated approximately 27,000 AF of wastewater. CMWD will only provide or purchase as much recycled water as needed to meet demands, up to its full treatment capacity; however, there is a sufficient supply of effluent from the Encina WPCF to produce more recycled water at the Carlsbad WRF if needed to meet higher demand.
CMWD does not have any upcoming infrastructure changes, such as scheduled operation and maintenance, construction impacts, water quality impacts, or projects that may affect supply in the next year.
2.6 Assessment Methodology
The methodology used to evaluate water supply reliability is described in CMWD’s WSCP Section 8.2 Annual Demand and Supply Reliability Assessment Procedures.
2.7 Description and Quantification of Each Water Supply Source
The California Water Code (CWC Section 10632(a)(2)(B)(v)) requires that each urban water supplier describe and quantify each of its water supply sources, to be used in combination with data on demand and infrastructure constraints to perform the annual water supply and demand assessment and to evaluate water supply reliability.
The description of each of CMWD’s water supply types can be found in Table 4 and Table 5 above, under the Water Supply Type, Additional Detail on Water Supply, and Water Quality columns.
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Carlsbad Municipal Water District 11 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
3. RELIABILITY ANALYSIS AND ACTIONS
The California Water Code (CWC Section 10632.1) requires that each urban water supplier assess its water supplies and demands on an annual basis, with information for anticipated shortage, triggered shortage response actions, compliance and enforcement actions, and communication actions consistent with the supplier’s water shortage contingency plan.
3.1 Supply and Demand Assessment
Table 6 and Table 7 below provide space for CMWD to comply with the requirements of the CWC. Table 6 presents unconstrainted demand for potable water compared to available potable supplies and presents the calculated surplus/shortage without demand reduction benefits of conservation actions from Level 1 Drought Watch. As shown in Table 6, CMWD expects to be able to produce and purchase enough supplies to meet demands.
By implementing Level 1 Drought Watch, CMWD expects to achieve a demand reduction benefit of 10.9%, which begins to approach the 20% conservation that would be required by a State Standard Shortage Response Level 2. CMWD intends to continue its Level 1 Drought Watch conservation actions over the next year. However, if there is a requirement under EO-N-7-22 to implement Level 2 actions, CMWD would do so. Table 6 presents the benefit from WSCP Level 2 Drought Watch demand reduction actions. Table 7 presents unconstrainted demand for recycled water compared to available recycled water supplies.
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Carlsbad Municipal Water District 12 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
Table 6: Potable Water Demand Supply Assessment (DWR Table 4(P): Potable Water Shortage Assessment)
Table 4(P): Potable Water Shortage Assessment1 Start Year:2022 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun3 Total
Anticipated Unconstrained Demand 1691.9 1792.3 1764.0 1619.3 1381.7 1414.3 1075.1 1125.2 1235.1 1335.5 1339.5 1530.2 17304.20
Anticipated Total Water Supply 1691.9 1792.3 1764.0 1619.3 1381.7 1414.3 1075.1 1125.2 1235.1 1335.5 1339.5 1530.2 17304.20
Surplus/Shortage w/o WSCP Action 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
% Surplus/Shortage w/o WSCP Action 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
State Standard Shortage Level 0 0 0 0 0 0 0 0 0 0 0 0 0
Benefit from WSCP: Supply Augmentation 0.0
Benefit from WSCP: Demand Reduction 399.3 423.0 416.3 382.2 326.1 333.8 253.7 265.5 291.5 315.2 316.1 361.1 4083.8
Revised Surplus/Shortage with WSCP 399.3 423.0 416.3 382.2 326.1 333.8 253.7 265.5 291.5 315.2 316.1 361.1 4083.8
% Revised Surplus/Shortage with WSCP 24% 24% 24% 24% 24% 24% 24% 24% 24% 24% 24% 24% 24%
Planned WSCP Actions
1Assessments are based on best available data at time of submitting the report and actual volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When optional monthly volumes aren't provided, verify Tables 2 and 3 use the same columns for data entry and are reflected properly in Table 4 and make sure to use those same columns to enter the
benefits from Planned WSCP Actions. Please see directions on the shortage balancing exercise in the Table Instructions. If a shortage is projected, the supplier is highly recommended to perform a
monthly analysis to more accurately identify the time of shortage.June 21, 2022Item #6 Page 19 of 22
Carlsbad Municipal Water District 13 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
Table 7: Recycled Water Demand Supply Assessment (DWR Table 4(NP): Non-Potable Water Shortage Assessment)
Table 4(NP): Non-Potable Water Shortage Assessment1 Start Year:2022 Volumetric Unit Used2:AF
Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun3 Total
Anticipated Unconstrained Demand: Non-Potable 503.8 540.3 549.0 481.4 295.2 344.5 115.8 152.2 266.8 135.3 310.7 410.1 4,104.98
Anticipated Total Water Supply: Non-Potable 503.8 540.3 549.0 481.4 295.2 344.5 115.8 152.2 266.8 135.3 310.7 410.1 4,105.0
Surplus/Shortage w/o WSCP Action: Non-Potable 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
% Surplus/Shortage w/o WSCP Action: Non-Potable 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Benefit from WSCP: Supply Augmentation 0.0
Benefit from WSCP: Demand Reduction 0.0
Revised Surplus/Shortage with WSCP 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
% Revised Surplus/Shortage with WSCP 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%
Planned WSCP Actions
1Assessments are based on best available data at time of submitting the report and actual volumes could be different due to many factors.
2Units of measure (AF, CCF, MG) must remain consistent.
3When optional monthly volumes aren't provided, verify Tables 2 and 3 use the same columns for data entry and are reflected properly in Table 4 and make sure to use those same columns to enter the
benefits from Planned WSCP Actions. Please see directions on the shortage balancing exercise in the Table Instructions. If a shortage is projected, the supplier is highly recommended to perform a
monthly analysis to more accurately identify the time of shortage.June 21, 2022Item #6 Page 20 of 22
Carlsbad Municipal Water District 14 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
3.2 Planned Shortage Response Actions
Table 8 below lists the demand reduction and supply augmentation actions from CMWD’s WSCP. These actions are consistent with Level 1 Drought Watch, CMWD’s current level of water use restrictions. CMWD will continue implementing shortage Level 1 actions over the next year, even though it does not anticipate a supply shortage. As documented in Table 6 and Table 7, above, no additional shortage response actions are anticipated to be necessary to meet projected demands should the Next Year be dry. However, CMWD will implement appropriate Level 2 actions from its WSCP as required by the California State Water Resources Control Board regulations promulgated per EO N-7-22.
Table 8: Water Conservation Actions (DWR Table 5: Planned Water Shortage Response Actions)
July 1,2022 to June 30,2023
Enter Amount
(Drop-down
List)
Select % or
Volume Unit
Start Month End Month
0 (No Shortage)Landscape - Limit landscape irrigation to specifi Yes 0.9 %July June
0 (No Shortage)CII - Other CII restriction or prohibition Yes 0.2 %July June
0 (No Shortage)
Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
Yes 0.9 %July June
0 (No Shortage)Expand Public Information Campaign Yes 4.7 %July June
0 (No Shortage)Provide Rebates for Landscape Irrigation
Efficiency Yes 4.2 %July June
0 (No Shortage)Landscape - Limit landscape irrigation to
specific days No 4.2 %July June
0 (No Shortage)Landscape - Other landscape restriction or
prohibition No 1.8 %July June
0 (No Shortage)
Other - Customers must repair leaks,
breaks, and malfunctions in a timely
manner
No 0.9 %July June
0 (No Shortage)
Water Features - Restrict water use for
decorative water features, such as
fountains
No 5.8 %July June
Table 5: Planned Water Shortage Response Actions
NOTES: Per EO N-77-22: Agency is implementing Level 1 Response Actions and locally appropriate Level 2 Response Actions throughout the year
even when there is no supply shortage.
Add additional rows as needed
How much is action going to
reduce the shortage gap?
When is shortage response
action anticipated to be
implemented?Is action
already being
implemented?
(Y/N)
ACTIONS: Demand Reduction, Supply
Augmentation, and Other Actions.
(Drop-down List)
These are the only categories that will be
accepted by the WUEdata online submittal
tool. Select those that apply.
Anticipated
Shortage
Level
Drop-down List of
State Standard
Levels (1 - 6) and
Level 0 (No
Shortage)
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Carlsbad Municipal Water District 15 Woodard & Curran, Inc. 2022 Water Shortage Assessment Report May 18, 2022
4. REFERENCES
California Department of Water Resources. 2022. Annual Water Supply and Demand Assessment Guidance. April.
California Department of Water Resources. 2022. Annual Water Supply and Demand Assessment Preliminary Report Submittal (Per EO 7-22) (workshop). April 28.
Carlsbad Municipal Water District. 2019. American Water Works Association Water Audit Report for Reporting Year 2018. August.
Carlsbad Municipal Water District. 2020. American Water Works Association Water Audit Report for Reporting Year 2019. August.
Carlsbad Municipal Water District. 2021. 2020 Urban Water Management Plan. June. Available online at: https://www.carlsbadca.gov/departments/utilities/water.
Carlsbad Municipal Water District. 2021. American Water Works Association Water Audit Report for Reporting Year 2020. August.
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