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EWG's Tap Water Database — 2019 UPDATE

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1,3-Dichloropropene

San Francisco Regional Water System

1,3-Dichloropropene is a volatile cancer-causing chemical primarily used as a nematocide to fumigate agricultural soils. It exists in two different forms: cis-1,3-dichloropropene and trans-1,3-dichloropropene.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND30ND
2014ND10ND
2015ND20ND
2016ND30ND
2017ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for 1,3-dichloropropene 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
2012-06-139590-001-1045ND
2013-06-189553-016-0936ND
2013-06-189553-001-1110ND
2013-10-079553-015-1024ND
2014-06-179553-016-0904ND
2015-05-279553-001-1235ND
2015-06-189553-015-0915ND
2016-06-149553-015-1231ND
2016-06-149553-001-1105ND
2016-06-219553-016-1055ND
2017-06-199553-015-1100ND
2017-06-199553-016-0953ND
2017-06-199553-001-1025ND