“A multicounty agency authorized to plan for and
acquire supplemental water supplies, encourage
water conservation and use of recycled water on
a regional basis.”
[BAWSCA Act, AB2058 (Papan-2002)]
BAWSCA Service Area
Every drop counts. Use Water Wisely.
How Has Water Use in the BAWSCA
Region Changed Over Time?
Nicole Sandkulla
CEO/General Manager, BAWSCA
September 27, 2022
24% Less Water Used T oday in BAWSCA Region Compared to FY 1986/87 Despite a 32% Population Increase
0.00 0.20
0.40 0.60
0.80 1.00
1.20 1.40
1.60 1.80
2.00 0
50 100
150
200
250
300
Population (millions)
Million Gallons Per Day (mgd)
Water Demand Drought Year Service Area Population
Source: BAWSCA FY 2020/21 Annual Survey
Residential Per Capita Water Use Has Decreased by 37% in BAWSCA Region Since FY 1986/87
Peak: 186.5 gpcd
FY 2020-21
107.3 gpcdPeak: 114.9 gpcd
FY 2020-21
65.8 gpcd
0 20
40 60
80 100
120
140
160
180
200
Per Capita Consumption
Gross Per Capita (gpcd) Residential Per Capita (gpcd)
Dashed line indicates drought year
Average Residential Water Use in BAWSCA Region in FY 2012/13 was 71 GPCD
• No agencies using < 48 GPCD
• 9 agencies using 48-65 GPCD
• 12 agencies using > 75 GPCD
• 49 GPCD SF Retail Residential
Use (avg.)
Sources: BAWSCA FY 2020/21 Annual Survey and SFPUC 2020 UWMP Average Residential Water Use in BAWSCA Region in FY 2012/13 was 66 GPCD
• 9 agencies using < 48 GPCD
• 8 agencies using 48-65 GPCD
• 4 agencies using > 75 GPCD
• 42 GPCD SF Retail Residential
Use (avg.)
Sources: BAWSCA FY 2020/21 Annual Survey and SFPUC 2020 UWMP In FY 2012/13, 31% of Water Customers in the BAWSCA Region Used Less Than 70 Gal Per Day
0 40
80 120
160
200
240
280
320
0 10 20 30 40 50 60 70 80 90 100
Residential Per Capita Consumption Cumulative Percentage of Population FY 2012-13 70 R-GPCD
Source: BAWSCA FY 2012/13 Annual Survey
In FY 2020/21, 90% of Water Customers in the BAWSCA Region Use Less Than 70 Gal Per Day, Compared to 31% in FY 2012/13 0 40
80 120
160
200
240
280
320
0 10 20 30 40 50 60 70 80 90 100
Residential Per Capita Consumption Cumulative Percentage of Population FY 2012-13 FY 2020-21 70 R-GPCD
Sources: BAWSCA FY 2012/13 and FY 2020/21 Annual Surveys 2 3
4 5
6 7
8 9
10 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
BAWSCA T otal Potable Water Use
(Billion Gallons)
2013 2015 2021 2022
BAWSCA July 2022 T otal Potable Water Use
28% Less Than July 2013 and 14% Less Than July 2019
July 2022 Total Potable Water Use:
- 28% less than July 2013
- 14% less than July 2019
- 16% less than July 2020
- 11% less than July 2021
Source: SWRCB Monthly Reporting
BAWSCA Working with Its Member Agencies to Achieve
Necessary Water Savings
• Water customers are responding to the call for
increased water conservation
• July 2022 water use showed increased savings compared to prior months
• Overall water use (from all sources) down 14% in July compared to FY 2019/20 (base year)
• Cumulative savings not yet achieving overall RWS target reductions
• BAWSCA and its member agencies are committed to
responding to SFPUC’s call for water use reductions
• What further actions are needed at the water supplier level and regionally?
• BAWSCA will work with the its member agencies and
the SFPUC to identify next steps in anticipation of
another dry year