Know Your Environment. Protect Your Health.

Heptachlor

Houma Water Treatment Service Area

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2018-08-2335413192001ND
2018-08-2335413192001ND
2019-02-1835449356001ND
2019-02-1835449356001ND
2019-08-2835494058001ND
2019-08-2835494058001ND
2020-01-2235526020001ND
2020-12-0335596462001ND
2021-03-1135619288001ND
2021-11-0435675777001ND
2022-03-0235701433001ND
2022-10-1235753132001ND
2023-04-1135791937001ND
2023-12-2135849973001ND