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Water Impacts and Trends

Annual water use and cost since 2000-01.

Sources

Golden State Water Company
Pomona College receives its potable, treated water from Golden State Water Company. This water is used for domestic uses, cleaning, landscaping, and all other water uses on campus. The water Pomona receives from Golden State Water Company is approximately 50% from local sources (including from the two local wells that Pomona owns) and approximately 50% from the State Water Project, which brings water down through the Central Valley.

Pomona College Wells
Pomona's two wells (located at Foothill Boulevard and College Avenue and at the northwest corner of Athern Field, on campus) and all other local sources of water draw from the watershed fed by San Antonio Creek, which runs north from Claremont into the mountains. The College's two wells produce approximately 400 million gallons of water per year.

Rainfall
The Claremont area receives an average of 15 inches of rain per year, which means that the campus intercepts 53.7 million gallons of rainwater per year.

Water Use

Historic Annual Water Use
YearGallonsChangeCost
99-00 124,388,322 +0.6% Unknown
00-01 112,002,078 -10.0% $87,694
01-02 108,314,930 -3.3% $96,056
02-03 106,827,803 -1.4% $103,268
03-04 103,035,927 -3.6% $110,630
04-05 84,080,291 -18.4% $103,976
05-06 105,205,278 +25.1% $106,424
06-07 102,786,826 -2.3% $96,732
07-08 81,714,951 -20.5% $104,875
08-09 97,579,636 +19.4% $119,399
09-10 86,135,938 -11.7% $116,232
10-11 87,420,343 +1.5% $114,677
11-12 99,565,532 +13.9% $171,345
12-13 95,561,645 -4.0% $159,415

Stormwater

Almost half of the campus is covered in landscaping and 37 percent of the campus is covered in "hardscape," which includes permeable (e.g. gravel paths) and impermeable (e.g. asphalt) ground coverings.   Based on groundcover, the College produces an estimated 28 million gallons of stormwater runoff each year. This stormwater carries a variety of pollutants to the ocean.

Progress toward goals for 2020

The following table includes relevant objectives from the College's Sustainability Action Plan.

How we're doing - 2020 Goals
Data point08-0909-1010-1111-1212-132020 Objective
Change in 3-year average water use 12% increase 33% increase 24% increase 9% decrease 5% annual reduction
Total water use (gallons) 97,579,636 86,135,938 87,420,343 99,565,532 95,561,645 No goal set
Use of reclaimed/gray water No No No No No Yes
Impermeable surfaces (square-feet) 2,996,263 2,996,263 2,912,752 2,893,299 1,773,809 No net increase
Use of sustainable stormwater techniques Increase  Increase Increase Increase General increase
% of major buildings metered for water 0 0% 3% 3% 8% 100%
(by May 2011)
% of all buildings metered for water 0% 0% 0% 0% 2% 100%
(by May 2014)