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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Brigham City Water System

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

 

24

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
2013ND60ND
2014ND20ND
2015N/A00N/A
2016ND150ND
2017ND10ND

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
2013-05-29ND
2013-05-29ND
2013-05-29ND
2013-06-26ND
2013-07-17ND
2013-10-16ND
2014-01-23ND
2014-07-10ND
2016-05-04ND
2016-05-04ND
2016-05-18ND
2016-05-18ND
2016-06-09ND
2016-06-09ND
2016-06-09ND
2016-07-20ND
2016-07-20ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-08-17ND
2016-10-05ND
2017-02-23ND