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EWG's Tap Water Database — 2021 UPDATE

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1,2,3-Trichloropropane

Town of Discovery Bay

1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND20ND
2014ND20ND
2015N/A00N/A
2016ND50ND
2017N/A00N/A
2018ND200ND
2019N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.0007 ppb

The EWG Health Guideline of 0.0007 ppb for 1,2,3-trichloropropane 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.

ppb = parts per billion

All test results

Date Lab ID Result
2013-10-28B3J2820-01ND
2013-10-28B3J2816-01ND
2014-04-17B4D1937-01ND
2014-04-17B4D1935-01ND
2016-06-165867-002-1030ND
2016-06-165867-006-1048ND
2016-06-165867-016-1220ND
2016-06-165867-007-1120ND
2016-06-165867-008-1245ND
2018-02-135867-002-1007ND
2018-02-135867-016-1013ND
2018-02-135867-008-0954ND
2018-02-135867-007-0920ND
2018-02-135867-006-0942ND
2018-04-135867-002-0950ND
2018-04-135867-008-1010ND
2018-04-135867-016-0900ND
2018-04-135867-007-1050ND
2018-04-135867-006-1140ND
2018-07-245867-006-0820ND
2018-07-245867-002-0740ND
2018-07-245867-016-0920ND
2018-07-245867-008-0754ND
2018-07-245867-007-0835ND
2018-10-105867-008-1340ND
2018-10-105867-016-1420ND
2018-10-105867-006-1310ND
2018-10-105867-002-1330ND
2018-10-105867-007-1242ND