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National Drinking Water Database

1,1-Dichloroethane in California

1,1-Dichloroethane is used in industrial chemical synthesis, as a solvent for plastics, paint, varnish, and finish removers and as an insecticide/fumigant.

The Most Polluted Communities in California

14 water utilities reported detecting 1,1-Dichloroethane in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average 1,1-Dichloroethane level

RankSystem Population Served Positive test results of total reported tests Average Level
1Gswc-South San Gabriel
San Dimas, CA
15,59398 of 2380.24 ppb
(0 to 1.8 ppb)
2Gswc - Norwalk
Santa Fe Springs, CA
31,32032 of 480.24 ppb
(0 to 1.4 ppb)
3Pleasant Grove Mhp
Oroville, CA
3271 of 30.17 ppb
(0 to 0.5 ppb)
4Monterey Park-City, Water Dept.
Monterey Park, CA
57,000141 of 3140.14 ppb
(0 to 1.39 ppb)
5City of Lindsay
Lindsay, CA
11,1851 of 20.14 ppb
(0 to 0.27 ppb)
6Valley County Water Dist.
Baldwin Park, CA
55,00039 of 3290.05 ppb
(0 to 1.45 ppb)
7Northern Calif Youth Corr. Center
Stockton, CA
4,8346 of 400.04 ppb
(0 to 0.83 ppb)
8Cal-Water Service Co.-Chico
Chico, CA
118,1086 of 1150.02 ppb
(0 to 0.99 ppb)
9Cal/Am Water Company - San Marino
Rosemead, CA
46,1252 of 570.02 ppb
(0 to 0.6 ppb)
10City of Porterville
Porterville, CA
49,4961 of 150.02 ppb
(0 to 0.3 ppb)

Health Based Limits for 1,1-Dichloroethane

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.3 ppb

Violation Summary for 1,1-Dichloroethane in California

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in California since 2004

Violation TypeNumber of Violations
Failure to monitor regularly7