Know Your Environment. Protect Your Health.

Heptachlor

Patton Village West Water System

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
2018N/A00N/A
2019ND10ND
2020ND40ND
2021ND20ND
2022ND30ND
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
2019-12-02AE90867ND
2020-07-30AF21490ND
2020-07-30AF21491ND
2020-07-30AF21492ND
2020-12-11AF37557ND
2021-01-12AF38948ND
2021-05-07AF53087ND
2022-06-06AF99755ND
2022-08-10AG08681ND
2022-10-18AG17508ND
2023-01-10AG23856ND
2023-04-03AG35240ND
2023-05-10AG40108ND
2023-07-14AG48876ND
2023-10-26AG61348ND