Know Your Environment. Protect Your Health.

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

Gonzales County Water Supply Corporation

NOTE: Gonzales County Water Supply Corporation purchases water from City of Gonzales which is required to test for 1,2-dibromo-3-chloropropane (dbcp). Sample information shown below was taken by City of Gonzales.

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.

 

4

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND10ND
2020ND90ND
2021N/A00N/A
2022ND10ND
2023ND60ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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

NOTE: Gonzales County Water Supply Corporation purchases water from City of Gonzales which is required to test for 1,2-dibromo-3-chloropropane (dbcp). Sample information shown below was taken by City of Gonzales.

Date Lab ID Result
2019-03-05AE57184ND
2020-01-21AE94427ND
2022-03-11AF88953ND
2023-02-27AG30653ND