Water Use

Potable water use by the San Diego County Water Authority’s 24 member agencies has decreased more than 20 percent since 2007, but high temperatures in recent months have made it challenging to reduce water use compared to the same months a year earlier.

Water Use Totals

Per capita water use in the Water Authority’s service area has fallen from more than 200 gallons per person/day to less than 150 gpcd over the past decade, as shown in the chart to the right. In 2015 total regional use of potable water is projected to be about 21 percent less than it was in 1990, even with a population increase of approximately 30 percent over that period.

The table below details regional water use (excluding recycled water) by month and year. It shows that total potable water use for the Water Authority service area for the 12 months ended September 2016 was down 3.4 percent compared to the year-earlier period. Urban (Municipal and Industrial) potable use for the same period was down 3.3 percent. For September 2016, total potable water use was up 8.2 percent over the same month a year earlier.

Calendar Years 2007-2016 (acre-feet)

Date Total Water Use1 M&I Water Use (Adjusted)2
Jan-07 50,449.4 44,790.0
Feb-07 33,494.8 31,397.5
Mar-07 49,106.6 44,151.3
Apr-07 53,876.8 48,039.7
May-07 65,470.1 57,627.3
Jun-07 70,605.8 62,931.3
Jul-07 79,205.8 70,574.4
Aug-07 77,999.5 68,610.3
Sep-07 70,260.0 62,425.4
Oct-07 64,435.2 57,011.6
Nov-07 53,724.2 48,136.7
Dec-07 33,925.9 32,357.6
Jan-Dec 2007 702,554.1 628,053.1
     
Jan-08 31,850.4 31,261.3
Feb-08 28,412.2 28,099.4
Mar-08 45,399.2 43,502.6
Apr-08 56,454.6 52,726.6
May-08 59,862.0 56,505.6
Jun-08 64,986.9 60.986.7
Jul-08 70,053.1 65,328.1
Aug-08 69,044.6 64,498.8
Sep-08 69,921.8 58,435.2
Oct-08 63,030.8 58,277.2
Nov-08 49,346.1 45,854.1
Dec-08 32,480.9 31,265.1
Jan-Dec 2008 633,842.6 596,722.7
     
Jan-09 38,998.5 36,590.2
Feb-09 30,739.4 29,407.6
Mar-09 44,220.4 40,925.8
Apr-09 49,517.4 44,953.4
May-09 55,955.3 50,511.1
Jun-09 51,236.4 46,751.1
Jul-09 60,204.0 53,967.5
Aug-09 61,909.4 55,325.0
Sep-09 60,049.9 53,269.2
Oct-09 53,265.7 47,945.3
Nov-09 46,740.5 42,228.5
Dec-09 30,449.7 29,045.1
Jan-Dec 2009 583,286.6 530,919.8
     
Jan-10 31,491.1 30,195.1
Feb-10 23,521.9 23,277.7
Mar-10 34,205.6 33,180.0
Apr-10 35,132.2 33,241.6
May-10 49,777.1 46,081.2
Jun-10 54,121.6 49,662.9
Jul-10 57,653.9 51,874.6
Aug-10 59,971.5 53,724.3
Sep-10 55,661.0 49,556.2
Oct-10 38,954.5 35,687.0
Nov-10 36,448.8 33,947.6
Dec-10 30,088.8 29,304.4
Jan-Dec 2010 508,028.0 469,732.5
     
Jan-11 32,028.4 30,836.3
Feb-11 29,527.6 27,871.5
Mar-11 30,029.6 29,106.5
Apr-11 38,501.1 35,971.1
May-11 48,465.9 44,530.1
Jun-11 52,125.6 47,372.8
Jul-11 59,627.3 53,673.7
Aug-11 60,432.9 54,080.2
Sep-11 53,789.8 48,127.2
Oct-11 47,462.5 42,969.1
Nov-11 31,168.5 29,281.5
Dec-11 33,408.6 31,191.5
Jan-Dec 2011 516,567.8 475,011.5
     
Jan-12 36,484.6 33,213.9
Feb-12 32,468.4 29,642.2
Mar-12 33,932.6 31,481.8
Apr-12 35,044.0 32,629.8
May-12 48,672.0 44,366.6
Jun-12 54,986.9 49,320.3
Jul-12 59,792.7 53,509.1
Aug-12 62,646.3 55,582.9
Sep-12 58,065.1 51,689.8
Oct-12 50,980.3 45,606.7
Nov-12 42,130.3 38,026.2
Dec-12 29,648.4 27,874.4
Jan-Dec 2012 544,851.6 492,943.7
     
Jan-13 31,183.1 29,906.4
Feb-13 29,270.0 27,827.1
Mar-13 38,481.6 36,107.8
Apr-13 45,975.0 42,156.8
May-13 52,079.5 47,883.5
Jun-13 56,409.3 51,647.8
Jul-13 58,994.1 53,797.7
Aug-13 59,549.1 54,336.4
Sep-13 56,811.3 51,572.7
Oct-13 48,660.8 44,826.0
Nov-13 39,752.4 36,818.1
Dec-13 37,213.3 34,505.5
Jan-Dec 2013 554,379.5 511,385.8
     
Jan-14 43,617.6 39,733.6
Feb-14 35,104.9 32,220.4
Mar-14 36,716.0 34,582.8
Apr-14 44,734.6 41,042.4
May-14 57,103.6 51,670.6
Jun-14 56,084.9 51,212.2
Jul-14 59,210.7 54,084.2
Aug-14 55,495.8 50,359.4
Sep-14 54,262.5 48,961.4
Oct-14 52,199.6 47,208.6
Nov-14 40,417.2 37,156.0
Dec-14 26,144.5 25,217.3
Jan-Dec 2014 561,091.9 513,448.9
     
Jan-15 31,077.6 29,774.5
Feb-15 33,492.6 31,022.0
Mar-15 39,802.3 37,006.4
Apr-15 42,956.3 39,155.9
May-15 35,657.6 33,246.2
Jun-15 41,627.7 37,963.1
Jul-15 39,239.5 36,115.8
Aug-15 44,506.1 40,556.6
Sept-15 40,859.3 37,493.6
Oct-15 38,844.3 35,751.6
Nov-15 33,855.2 31,322.6
Dec-15 29,907.0 28,090.0
Jan-Dec 2015 451,855.5 417,498.3
     
Jan-16 25,221.6 24,548.3
Feb-16 30,905.5 29,006.4
Mar-16 31,605.7 29,682.2
Apr-16 34,972.5 32,454.9
May-16 38,285.4 35,412.2
Jun-16 43,913.0 40,015.3
Jul-16 49,604.0 44,618.1
Aug-16 50,667.9 46,142.3
Sep-16 44,215.0 40,518.3
2016 Year to Date 349,390.6 322,398.0


Footnotes:

1 Excludes reclaimed water.
2 In order to provide for a meaningful comparison, 2007 M&I water use was adjusted for 2009-2011 IAWP and SAWR opt-out volumes that convert to M&I water use.
Note: Tables reflect most current data.

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