Know Your Environment. Protect Your Health.

Heptachlor

Stanley Lake Municipal Utility District

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

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND10ND
2020ND30ND
2021ND40ND
2022ND30ND
2023ND30ND

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
2018-02-20AE14532ND
2018-02-20AE14546ND
2019-03-04AE57022ND
2020-08-11AF22975ND
2020-08-11AF22976ND
2020-11-20AF35551ND
2021-01-14AF39637ND
2021-01-14AF39638ND
2021-01-14AF39639ND
2021-04-14AF50216ND
2022-08-04AG07987ND
2022-08-04AG07989ND
2022-10-18AG17475ND
2023-01-25AG26347ND
2023-01-25AG26348ND
2023-04-10AG36142ND