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EWG's Tap Water Database — 2021 UPDATE

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1,2-Dichloropropane

Golden State Water Company (GSWC) - Norwalk

1,2-Dichloropropane is a volatile carcinogenic solvent discharged from chemical factories and landfills. It also contaminates farmland due to its former use as a soil fumigant. Read More.

The insecticide and fumigant uses of 1,2-dichloropropane were discontinued in the 1980s, but it is still used as an industrial solvent. The California public health goal of 0.5 parts per billion, set to protect against cancer, is 10 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion. 1,2-Dichloropropane can also damage the nervous system, liver, kidneys, and digestive and respiratory systems.

Click here to read more about carcinogenic VOCs.

 

39

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND50ND
2015ND50ND
2016ND60ND
2017ND90ND
2018ND80ND
2019ND60ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for 1,2-dichloropropane was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for 1,2-dichloropropane, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-042706-010-1225ND
2014-02-042706-016-0900ND
2014-05-062706-016-1028ND
2014-08-062706-016-0940ND
2014-11-042706-016-1054ND
2015-02-022706-010-1023ND
2015-02-032706-016-1152ND
2015-05-072706-016-1358ND
2015-08-042706-016-0821ND
2015-11-042706-016-1304ND
2016-05-022706-028-1147ND
2016-05-022706-032-0751ND
2016-05-042706-016-0921ND
2016-05-042706-016-0910ND
2016-08-022706-016-1146ND
2016-11-082706-016-1303ND
2017-01-039590-016-1315ND
2017-01-189590-032-1354ND
2017-01-189590-028-1306ND
2017-02-099590-010-1025ND
2017-02-139590-016-0850ND
2017-02-279590-028-1013ND
2017-05-039590-016-0920ND
2017-08-019590-016-1029ND
2017-11-099590-016-1103ND
2018-02-089590-016-1401ND
2018-02-129590-010-1230ND
2018-03-079590-016-1407ND
2018-03-079590-028-1338ND
2018-03-079590-032-1304ND
2018-05-029590-016-1147ND
2018-09-129590-016-1156ND
2018-11-069590-016-1203ND
2019-02-119590-032-1330ND
2019-02-119590-016-1054ND
2019-02-129590-028-1333ND
2019-05-089590-016-1140ND
2019-08-069590-032-1220ND
2019-11-069590-032-1235ND