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EWG's Tap Water Database — 2019 UPDATE

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1,2-Dibromo-3-chloropropane (DBCP)

City of Ripon

1,2-Dibromo-3-chloropropane is a pesticide fumigant banned in the 1970s after scientists discovered it caused sterility in men who worked with it. The chemical causes cancer in laboratory animals and may cause cancer in people. Read More.

This pesticide breaks down very slowly in the environment. It remains in groundwater and drinking water wells in the agricultural areas where it was sprayed in the past. Men exposed to this pesticide in the fields suffered from infertility and testicular damage, and tended to have fewer male babies.

 

19

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.0108 ppb41ND - 0.0430 ppb
2013ND40ND
2014ND30ND
20150.00867 ppb31ND - 0.0260 ppb
20160.00500 ppb31ND - 0.0150 ppb
20170.00800 ppb21ND - 0.0160 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.0017 ppb

The EWG Health Guideline of 0.0017 ppb for 1,2-dibromo-3-chloropropane 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) 0.2 ppb

The legal limit for 1,2-dibromo-3-chloropropane, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to 1,2-dibromo-3-chloropropane exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-03-073334-003-0817ND
2012-06-133334-022-1013ND
2012-06-133334-007-09270.0430 ppb
2012-07-183334-024-1040ND
2013-03-053334-003-0907ND
2013-06-103334-007-1052ND
2013-06-103334-022-1025ND
2013-06-263334-010-1425ND
2014-03-045810-003-0815ND
2014-06-055810-007-1350ND
2014-07-095810-020-0750ND
2015-03-045810-003-0845ND
2015-06-085810-007-09550.0260 ppb
2015-07-085810-024-0955ND
2016-06-155810-007-09450.0150 ppb
2016-06-155810-010-0820ND
2016-06-175810-022-0730ND
2017-06-145810-007-09000.0160 ppb
2017-06-145810-010-0930ND