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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Farmington City Water System

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

 

19

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
2014ND40ND
2015N/A00N/A
2016ND110ND
2017N/A00N/A

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 Result
2013-11-05ND
2013-11-05ND
2013-11-06ND
2013-11-06ND
2014-03-18ND
2014-06-16ND
2014-09-17ND
2014-12-11ND
2016-01-22ND
2016-02-03ND
2016-02-10ND
2016-09-13ND
2016-09-13ND
2016-09-13ND
2016-09-13ND
2016-11-10ND
2016-11-10ND
2016-11-10ND
2016-11-10ND