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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor

Assumption Parish Waterworks District 1

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

MORE ABOUT THIS CONTAMINANT

 

24

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
2014ND80ND
2015ND20ND
2016ND40ND
2017ND40ND
2018ND20ND
2019ND40ND

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
2014-02-03AD88681ND
2014-02-03AD88681ND
2014-04-14AD90510ND
2014-04-14AD90510ND
2014-07-21AD93831ND
2014-07-21AD93831ND
2014-10-06AD98268ND
2014-10-06AD98268ND
2015-03-3135181766003ND
2015-03-3135181766003ND
2016-03-1535234393001ND
2016-03-1535234393001ND
2016-09-1935266189008ND
2016-09-1935266189008ND
2017-01-3135292293003ND
2017-01-3135292293003ND
2017-10-1635342351003ND
2017-10-1635342351003ND
2018-07-2335406285001ND
2018-07-2335406285001ND
2019-01-2935445085001ND
2019-01-2935445085001ND
2019-07-2435484850001ND
2019-07-2435484850001ND