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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor

City of Pocatello

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

MORE ABOUT THIS CONTAMINANT

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018ND10ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2018-05-02SI80502301ND
2019-10-08SI91009201ND
2019-10-08SI91009208ND
2019-10-08SI91009207ND
2019-10-08SI91009206ND
2019-10-08SI91009205ND
2019-10-08SI91009204ND
2019-10-08SI91009203ND
2019-10-08SI91009202ND
2019-10-08SI91008801ND
2019-10-08SI91008808ND
2019-10-08SI91008807ND
2019-10-08SI91008806ND
2019-10-08SI91008805ND
2019-10-08SI91008804ND
2019-10-08SI91008803ND
2019-10-08SI91008802ND