Recycled Water Are Included in the Budget Calculation and Must Also Meet Conservation Standards

Water Demand, Supply, Conveyance and Storage March 23, 2021 - Board Workshop

Judy Zavadil Irene Suroso Water Supply Planning

Water Supply, Storage, Public Hearing: Conveyance, Quality Demand and 2020 Urban Water and Conservation Water Supply Management Plan Policy Review Adoption

Mar 23 Apr 6 Apr 20 Jun 1 Jun 16

DSRSD 2021 Public Hearing: Alternative Water 2020 Urban Water Supply Study Management Plan Zone 7 Water Demand is Key Supply Evaluation

DSRSD Urban Water Management Plan

Zone 7 WATER Urban Water DEMANDS Management Plan

DSRSD Alternative Water Supply Study Zone7/DSRSD Contract Negotiation (2024) 18000 General Plan Buildout at 2035 16000 Projected Water Demand DSRSD Total Water Consumption

14000

12,619 12,644 12000 11,213 12,228 10,878 11,185 10000 10,003 10,014 8,895 9,175 8,477 8,291 8000 Total Water Use, AF Use, Water Total 7,053 6000 5,582

4,505 4000 3,150

2000

0 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

Total Water Use (Potable+Recycled) Projected Water Use (Potable + Recycled) Tri Valley Water Liaison Committee trivalleydrought.org 250 30000 Daily Gallons per Capita Water Use

200.4 200 24000

159.8 166.0 157.8 DWR 20% by 2020 Target = 169 gpcd 150 139.9 138.4 18000 132.9 130.0 127.2

110.1 107.6 107.9 99.9 99.6 97.0 96.4 97.4

95.7 Accounts Total 100 90.3 87.9 91.2 12000 84.7 83.0 84.6 83.6 75.3 Per Capita Water Use, gpcd Use, Water Capita Per 73.5 70.1 70.1 71.7 62.2 64.3

50 6000

0 0 2004 2006 2008 2010 2012 2014 2016 2018 2020 Potable Accounts System-wide Residential Indoor + Outdoor Aggregate residential indoor use Making Water + Conservation Aggregate residential outdoor use a California + Aggregate CII outdoor use Way of Life CII landscape areas with dedicated irrigation meters State AB 1668 + Aggregate water loss and SB 606 + Bonus incentives Up to 15% of potable reuse water = DSRSD Water Use Objective Residential Indoor Target, gallons per capita per day Residential Indoor Water Use - Based on Winter Months 75

70.1 70.4 70 69.1 66.6

59.8 60 58.7 59.0 59.1 56.8 53.6 54.7 54.5 55 52.9 52.6 51.6

Per Capita Water Use, gpcd CapitaWater Per 45

30 2004 2006 2008 2010 2012 2014 2016 2018 2020 Residential only 2025 Goal 2030 Goal Residential Outdoor CII Outdoor Landscape

Areas irrigated with recycled water are included in the budget calculation and must also meet conservation standards. System-Wide Water Losses

300 9.00% 7.9% 7.8% 7.7% 7.4% 7.6% 7.6% 8.00% 250 7.0% 7.00%

200 5.6% 5.7% 5.7% 6.00%

5.00% 150 4.00% Total in in MG Total 100 3.00%

2.00% 50 1.00%

0 0.00% 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Non-Revenue Water Water Losses 2019 - 2021 2022 2024 2027

Developing Adopt Suppliers Suppliers reach standards and rulemaking calculate objectives regulatory docs objectives

RULEMAKING REPORTING COMPLIANCE Tri Valley Water Liaison Committee trivalleydrought.org 18000 Integrated Approach to 16000 Water Supply Management DSRSD Total Water Consumption (Potable Water + Recycled Water) 14000

12000

10000

8000 Total Water Use, AF Use, Water Total

6000

4000

2000

Potable Water Use without Moratorium Recycled Water Use - Moratorium Additional Recycled Water Supply Needed TotalTri Valley Water Water Liaison Use Committee with trivalleydrought.org RW Moratorium Seasonal Recycled Water Use Monthly Water Consumption - Calendar Year 2020 1600

1400

490 383 487 422 1200 433

Potable Water 352 1000 Recycled Water 148 800 129 141 77 19 75 600

Total Water Use, AF Use, Water Total 1,098 1,034 1,050 1,047 959 903 400 783 726 723 684 580 625 200

0 January February March April May June July August September October November December Water Supply, Storage, and Conveyance »Tri-Valley’s Water Supplies »The State Water Project »Conveyance of Imported Water »Zone 7’s Storage System Tri-Valley Water Supply Sources of Supplies

» 80% of Supply is provided Zone 7 9% » 70% State Water Project 11%

» 10% local runoff 10% 70% » 11% natural groundwater recharge » 9% recycled water Provided by Zone 7

Retailer Recycled Water Ground Water Quotas (Retailers) Arroyo Valle (Zone 7) State Water Project (Zone 7) Tri Valley Water Liaison Committee trivalleydrought.org State Water Feather River Project (70%) Drainage

Lake Oroville

Tri Valley Water Liaison Committee trivalleydrought.org Water is stored behind the Oroville Dam

Tri Valley Water Liaison Committee trivalleydrought.org Photo courtesy of CADWRPhoto courtesy Feather River blends with the Sacramento River

Tri Valley Water Liaison Committee trivalleydrought.org Water flows into the Sacramento- San Joaquin Delta…

Tri Valley Water Liaison Committee trivalleydrought.org Water flows through the Delta South Bay Aqueduct

Water is pumped into the South Bay Aqueducts Challenges with Delta Conveyance

Tri Valley Water Liaison Committee trivalleydrought.org Reduced Reliability of Imported Supplies Sea Level Rise Reduced Reliability of Imported Supplies

Water Quality Degradation Reduced Reliability of Imported Supplies Seismic Risks Reduced Reliability of Imported Supplies

Ecosystem Considerations Zone 7 and Water Retailers

Cal Water DSRSD Livermore Pleasanton

Tri Valley Water Liaison Committee trivalleydrought.org Lake Del Valle, June 2013

Natural Groundwater Recharge (10%) Groundwater Basin Historical Levels

Livermore Key Well – Mocho Sub-Basin 500 LAND SURFACE ELEVATION 462’ 450

400 Spring Water Levels 350 Bottom of Operational Storage Reserve Storage 300 Estimated Bottom of Recent Alluvium Elevation 299’ Groundwater Elevation (in feet) (in Elevation Groundwater 250 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 Local Runoff - Lake Del Valle (10%)

Tri Valley Water Liaison Committee trivalleydrought.org Recycled Water (9%)

2020 DSRSD WWTP Influent and Produced Recycled Water 12.00

10.00

8.00

6.00

4.00

Millions of Gallons per Day per Gallons of Millions 2.00

0.00 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Recycled Water Produced Influent

Tri Valley Water Liaison Committee trivalleydrought.org Lake Oroville Zone 7 Storage

Sacramento

Local Groundwater Chain of Lakes: Basin (Main Basin) • Lake I • Cope Lake San Francisco

South Bay Aqueduct Lake Del Valle San Jose

San Luis Reservoir

Fresno

Cawelo Water District

Semitropic Water Storage District

Bakersfield Above-ground: Surface Water Reservoirs

OWNED BY DWR OWNED BY ZONE 7

Lake Del Valle San Luis Reservoir Lake I Cope Lake

7,500 ac ft 10,000-15,000 ac ft 10,800 (26,800 total) ac ft 4,500 ac ft Below-ground: Groundwater Aquifers

MANAGED BY ZONE 7 KERN COUNTY GROUNDWATER BANKS

Semitropic Water Livermore Valley Groundwater Basin Cawelo Water District Storage District 126,000 ac ft (+128,000 of emergency storage) 78,000 ac ft 120,000 ac ft 34

Tri Valley Water Liaison Committee trivalleydrought.org Zone 7 Storage 140,000 SURFACE WATER GROUNDWATER 120,000

100,000

80,000

60,000

40,000

20,000

- San Luis Lake Del Valle Lake I Cope Lake Livermore Semitropic Cawelo Reservoir Valley 35

Tri Valley Water Liaison Committee trivalleydrought.org Banking Water– Wet Years

» Semitropic or Cawelo farmers use Zone 7’s water instead of groundwater, or

» Zone 7 water is placed in spreading ponds or recharge basins

Tri Valley Water Liaison Committee trivalleydrought.org Credit: Kern County Water Agency Withdrawing Water from the Bank – Dry Years

» Do not pump water from south to Example of a water north. exchange » Water withdrawal from banking MWD’s water pumped programs is done through from the Delta and “exchanges”. delivered to Zone 7 » A similar approach is used for Zone 7’s groundwater in Kern San Luis Reservoir County pumped into the CA Aqueduct

MWD receives water from the CA Aqueduct

Tri Valley Water Liaison Committee trivalleydrought.org Groundwater Bank Account

Tri Valley Water Liaison Committee trivalleydrought.org Questions? Managing Supply & Demand March 23, 2021 - Board Workshop

Jan Lee

Tri Valley Water Liaison Committee trivalleydrought.org Annual Sustainability Report

Tri Valley Water Liaison Committee trivalleydrought.org Piecing the Puzzle Together

» Hydrology » SWP Allocation » Delta Restrictions » Operations » Supplemental Supplies » Multi-year Planning » Cost Piecing the Puzzle Decreasing SWP Allocations Together 120

100 » Hydrology » SWP Allocation 80 » Delta Restrictions 60

» Operations 40 » Supplemental Supplies 20 » Multi-year Planning » Cost 0

Final Allocation Long Term Reliability 4 Piecing the Puzzle Delta Smelt Together

» Hydrology » SWP Allocation » Delta Restrictions » Operations » Supplemental Supplies » Multi-year Planning » Cost

5 Piecing the Puzzle Mocho Demin Plant Together

» Hydrology » SWP Allocation » Delta Restrictions » Operations » Supplemental Supplies » Multi-year Planning » Cost

6 Yuba Accord Instream Flow Requirements Piecing the Puzzle 2500 Transfer Window Together

2000 » Hydrology

) Schedule 1

» SWP Allocation cfs Schedule 2 1500 » Delta Restrictions Gage ( Schedule 3 Schedule 4 » Operations Schedule 5 Schedule 6 » Supplemental Supplies 1000 » Multi-year Planning Flow Releases Marysfille at Releases Flow » Cost 500

7 0 1-Oct 1-Nov 1-Dec 1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep Piecing the Puzzle Together

» Hydrology » SWP Allocation » Delta Restrictions Mar Mar Mar » Operations 2013 2014 2015 » Supplemental Supplies » Multi-year Planning » Cost Lake Oroville $ Water Putting the Puzzle Transfers Together $$ to $$$$ Sacramento » Hydrology $ $0 Local Groundwater Chain of Lakes: » SWP Allocation Basin (Main Basin) • Lake I • Cope Lake » Delta Restrictions San Francisco South Bay Aqueduct Lake Del Valle $0 » Operations San Jose

» Supplemental Supplies San Luis Reservoir $0 » Multi-year Planning Fresno » Cost Cawelo Water District$$$$

Semitropic Water $$$$ Storage District

Bakersfield Zone 7 Supplies – Actuals for 2014 Kern County GW Banks 4,000 Local GW Storage 3,750 Water Transfers 3,500

3,250 Carryover

3,000 Local Runoff

2,750 State Water Project 2,500

2,250 Projected 2014 Supplies Remaining for 2015 FEET - 2,000 SWP Carryover:

ACRE 1,750 4,000 AF Excess Cawelo and 1,500 Semitropic: 5,200 AF ------1,250 Total: 9,200 AF 1,000

750 YUBA ACCORD AVAILABLE 80% of SWP allocation, and Semitropic and Cawelo 500 20% of SWP normally available 250 allocation available

0 Jan-14 Feb-14 Mar-14 Apr-14 May-14 Jun-14 Jul-14 Aug-14 Sep-14 Oct-14 Nov-14 Dec-14 Delivered Water Supply Supplies: 2014-2015, 2019-2020

50,000 Mandatory Rationing 45,000

40,000

35,000 Kern County GW Banks 30,000 Local GW Storage 25,000 Water Transfers Carryover 20,000 Local Runoff 15,000 State Water Project

10,000

5,000

- 2014 2015 2019 2020 SWP Allocation 5% 20% 75% 20% Planning for the Next Year 80,000

Delivered Water Supplies 70,000 Delivered to Storage Carryover 60,000

50,000

40,000

30,000

20,000

10,000

- 2014 2015 2019 2020 Managing Recycled Water Supplies and Demand

WWTP Average Dry Weather Flow Supplemental Recycled Water Supplies

Temporary CCCSD Supply

WWTP Influent Limit: ~10.3 mgd Key Takeaways

» Conservation is a way of life » Integrated approach to managing recycled water and potable water » 70% of Tri-Valley supply is imported through the Delta » Surface water and groundwater storage facilities are critical components of Zone 7’s water system » Multiple factors go into creating a water operations plan each year » There is no “normal” water year type » Best solutions will complement existing puzzle pieces Next Steps

Water Supply, Storage, Public Hearing: Conveyance, Quality Demand and 2020 Urban Water and Conservation Water Supply Management Plan Policy Review Adoption

Mar 23 Apr 6 Apr 20 Jun 1 Jun 16

DSRSD 2021 Public Hearing: Alternative Water 2020 Urban Water Supply Study Management Plan Questions?