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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

The Most Polluted Communities

12 water utilities reported detecting Total polychlorinated biphenyls (PCBs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by population

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1City of Lodi
Lodi, CA
53,9031 of 23< 0.01 ppb
(0 to 0.08 ppb)
2Bardstown Municipal Water Dept
Bardstown, KY
34,6501 of 70.02 ppb
(0 to 0.11 ppb)
3Paris Water Works
Paris, KY
15,1471 of 40.14 ppb
(0 to 0.56 ppb)
4Waterford Water Works
Waterford, NY
12,0002 of 51< 0.01 ppb
(0 to 0.02 ppb)
5Halfmoon Water District
Halfmoon, NY
11,7211 of 58< 0.01 ppb
(< .01 to 0.006985 ppb)
6Florida City
Florida City, FL
9,4451 of 30.03 ppb
(0 to 0.1 ppb)
7Banks Water Department
Banks, OR
1,7001 of 40.03 ppb
(0 to 0.1 ppb)
8Mcwa, Genesee West
Rochester, NY
8001 of 20.04 ppb
(0 to 0.07 ppb)
9Oh/Am Mansfield System 6
Marion, OH
4051 of 20.03 ppb
(0 to 0.05 ppb)
10Lombard Water Company
St Helens, OR
3051 of 30.07 ppb
(0 to 0.2 ppb)
11Muscatatuck Urban Training Center
Butlerville, IN
1141 of 60.04 ppb
(0 to 0.23 ppb)
12Rolling Acres S/D
Raleigh, NC
571 of 90.03 ppb
(0 to 0.31 ppb)