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Table 20: Water to Watch: Hundreds of water systems have water supplies contaminated with nitrate at concentrations approaching

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Pouring It On: Table 20: Water to Watch: Hundreds of water systems have water supplies contaminated with nitrate at concentrations approaching

February 1, 1996
Rank System City State Population Served Highest Sample Date of Highest Sample Number of Samples Taken % over Int'l Standard
1 Waterloo Water Works Waterloo IA 66,467 9.9 8/10/94 113 25.7%
2 East Hempfield Water Authority Landisville PA 13,493 9.9 9/15/93 73 58.9%
3 Harford County Dpw Bel Air MD 63,000 9.9 7/26/93 20 10.0%
4 Westminster Westminster MD 22,766 9.9 2/18/93 18 77.8%
5 City Of Wasco Wasco CA 13,774 9.8 2/14/95 7 42.9%
6 Northern Il Wtr Corp-Pontiac Pontiac IL 11,200 9.8 3/26/95 63 50.8%
7 City Of Lancaster Authority Lancaster PA 108,000 9.8 2/8/94 18 38.9%
8 Cal. Water Service Co.-East L.A. San Jose CA 152,970 9.8 7/13/93 21 23.8%
9 Morro Bay City Water Dept Morro Bay CA 15,000 9.8 7/5/95 25 28.0%
10 City Of Manteca Manteca CA 44,500 9.8 3/5/93 24 41.7%
11 City Of Chino Hills Chino Hills CA 49,000 9.8 11/10/93 17 35.3%
12 Chippewa Falls Waterworks Chippewa Falls WI 12,989 9.7 8/30/93 1 100.0%
13 Hillcrest Wc - 1,2,3 & 4 Yuba City CA 10,062 9.6 7/25/95 6 33.3%
14 City Of Fresno Fresno CA 390,350 9.6 8/31/94 312 17.6%
15 Garden City, City Of Garden City KS 24,097 9.5 5/9/94 27 22.2%
16 Ottumwa Water Works Ottumwa IA 24,488 9.5 5/1/95 14 50.0%
17 Lca-Wlsa Central Division Wescosville PA 17,285 9.4 6/21/94 244 95.9%
18 Bucks Co Water And Sewer Auth Warrington PA 16,200 9.4 12/26/93 3 33.3%
19 La Crosse Waterworks La Crosse WI 51,000 9.4 12/15/93 1 100.0%
20 Decatur Decatur IL 83,885 9.4 6/6/95 134 43.3%
21 Cuc - Suburban Sacramento CA 32,000 9.3 2/16/95 69 14.5%
22 City Of Davis Davis CA 48,250 9.3 7/26/95 116 13.8%
23 City Of Bakersfield Bakersfield CA 57,740 9.3 10/3/94 62 8.1%
24 West San Bernardino Cwd Rialto CA 41,454 9.3 3/6/95 34 50.0%
25 Bloomington Bloomington IL 52,000 9.3 5/30/95 63 41.3%
26 City Of Downey Downey CA 91,000 9.2 2/17/93 53 3.8%
27 Northampton Bucks Co. Mun Auth Richboro PA 30,000 9.2 9/8/94 40 2.5%
28 Metropolitan Water Co Tucson AZ 36,250 9.2 12/23/93 109 6.4%
29 City Of Rialto Rialto CA 48,418 9.1 12/7/93 131 27.5%
30 Oxnard Wd Oxnard CA 146,571 9.1 6/22/95 23 17.4%
31 Del Este Modesto CA 11,851 9.1 5/12/93 8 37.5%
32 Chester Water Authority Chester PA 110,000 9.1 1/21/94 11 45.5%
33 City Of Anaheim Anaheim CA 286,680 9.0 8/9/95 136 22.8%
34 University of Pennsylvania University Park PA 37,000 8.9 7/13/94 45 37.8%
35 Il American Wtr Cmpny-Pekin Pekin IL 39,000 8.9 7/19/94 34 11.8%
36 San Jose Water Company San Jose CA 921,000 8.9 5/17/93 264 11.4%
37 City Of Ceres Ceres CA 28,988 8.9 2/2/95 8 50.0%
38 City Of Delano Delano CA 29,944 8.9 8/10/93 47 53.2%
39 Us Army Fort Irwin Fort Irwin CA 16,000 8.8 2/14/95 42 26.2%
40 Security W&SD Colorado Springs CO 10,007 8.8 4/3/95 80 93.8%

Source: State drinking water agency nitrate monitoring database. Compiled by Environmental Working Group.