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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Greenville Water System

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
2012ND20ND
2013ND20ND
2014ND20ND
2015ND20ND
2016ND20ND
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
2012-01-03AD00645ND
2012-01-03AD00647ND
2013-01-10AD18209ND
2013-01-10AD18219ND
2014-01-27AD34958ND
2014-01-27AD34962ND
2015-02-03AD51025ND
2015-02-03AD51022ND
2016-01-27AD69775ND
2016-01-27AD69773ND
2017-10-30AE02705ND
2017-10-30AE02698ND