Know Your Environment. Protect Your Health.

Heptachlor

Bristol Water Department

Heptachlor is an insecticide used for termite control until 1988. It is linked to cancer, hormone disruption and neurotoxicity.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND50ND
2021ND20ND
2022ND10ND
2023ND50ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.008 ppb

The EWG Health Guideline of 0.008 ppb for heptachlor 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): 0.4 ppb

The legal limit for heptachlor, 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 due to heptachlor exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2018-07-09D8G0647-01SOCND
2019-03-27D9C2625-01SOCRND
2020-02-26D0B2110-01SOCND
2020-02-26D0B2110-02SOCND
2020-02-26D0B2110-03SOCND
2020-02-26D0B2110-04SOCND
2020-02-26D0B2111-01SOCRND
2021-02-25D1B2160-01SOCND
2021-02-25D1B2162-01SOCND
2022-02-03D2B0371-01SOCND
2023-02-23D3B2330-01SOCND
2023-03-06D3C0647-02SOCND
2023-03-15D3C1379-01SOCND
2023-03-15D3C1379-02SOCND
2023-03-22D3C2016-01SOCND