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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Edina

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

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND100ND
2014ND50ND
2015N/A00N/A
2016ND140ND
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 Lab ID Result
2012-03-2712C0954-01ND
2013-02-2713B1315-01ND
2013-05-3013E2572-01ND
2013-05-3013E2572-02ND
2013-05-3013E2572-04ND
2013-07-2513G2163-01ND
2013-07-2513G2162-02ND
2013-07-2513G2159-02ND
2013-07-2513G2159-01ND
2013-12-1213L0421-01ND
2013-12-1213L0421-02ND
2014-08-2014H1841-02ND
2014-08-2014H1844-02ND
2014-08-2014H1844-03ND
2014-11-1914K0831-02ND
2014-11-1914K0831-01ND
2016-04-113428615ND
2016-04-113428663ND
2016-04-113428679ND
2016-04-113428700ND
2016-06-203475893ND
2016-06-213478339ND
2016-06-213475937ND
2016-06-213475908ND
2016-06-213475818ND
2016-07-213500709ND
2016-07-213500714ND
2016-07-213500792ND
2016-07-213500797ND
2016-07-263504268ND
2017-07-2617G1803-01ND