Know Your Environment. Protect Your Health.

Heptachlor

Tensas Water District Association

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

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND40ND
2020ND40ND
2021ND40ND
2022ND40ND
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
2018-07-3035407878001ND
2018-07-3035407878001ND
2019-01-1435442603003ND
2019-01-1435442603003ND
2019-07-3135486747001ND
2019-07-3135486747001ND
2020-01-0635523112001ND
2020-08-1235570539001ND
2020-09-0935577116001ND
2020-11-1035591783001ND
2021-01-1835605842001ND
2021-05-1335633523002ND
2021-09-1535664394001ND
2021-12-0335682177001ND
2022-01-1835692112003ND
2022-04-1135711946001ND
2022-08-1535741176003ND
2022-12-0735766643001ND
2023-01-1735773661001ND
2023-02-0635778177002ND
2023-04-1235794072001ND
2023-07-1835814093001ND
2023-11-0735841747001ND