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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Forrest City Waterworks

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
2014ND20ND
2015N/A00N/A
2016ND40ND
2017ND20ND

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
2013-08-2713241000306ND
2013-08-2713241000206ND
2013-11-0513310000906ND
2013-11-0513310000806ND
2014-04-2314114013806ND
2014-08-2714240000606ND
2016-07-0616189013506ND
2016-07-0616189013606ND
2016-11-1416321008901ND
2016-11-1416321008801ND
2017-04-0317096000206ND
2017-10-0317278005601ND