Know Your Environment. Protect Your Health.

Heptachlor

Town of Hampstead

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

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019N/A00N/A
2020ND10ND
2021ND80ND
2022ND20ND
2023N/A00N/A

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
2018-10-02E19001152003ND
2018-10-02E19001152005ND
2018-10-02E19001152007ND
2018-10-02E19001152009ND
2018-10-02E19001152011ND
2018-10-02E19001152001ND
2020-07-29E21000293001ND
2021-01-31E21001849001ND
2021-04-08E22000815006ND
2021-06-03E21003569001ND
2021-06-03E21003570001ND
2021-09-08E22000815001ND
2021-09-08E22000815011ND
2021-09-08E22000815016ND
2021-09-08E22000815021ND
2022-05-25E2201063601ND
2022-08-03E2300023805ND