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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Garden City Water and Sewer System

Heptachlor epoxide is a breakdown product of heptachlor, a highly toxic and carcinogenic pesticide banned in the U.S. since the 1980s.

 

13

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
2013ND80ND
2014N/A00N/A
2015N/A00N/A
2016ND50ND
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.006 ppb

The EWG Health Guideline of 0.006 ppb for heptachlor epoxide 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) 0.2 ppb

The legal limit for heptachlor epoxide, 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.

ppb = parts per billion

All test results

Date Lab ID Result
2013-05-13S1320406ND
2013-05-13S1320403ND
2013-05-13S1320404ND
2013-05-13S1320401ND
2013-05-14S1320583ND
2013-05-14S1320586ND
2013-07-02S1328445ND
2013-07-02S1328446ND
2016-05-26S1622903ND
2016-05-26S1622947ND
2016-07-18S1631707ND
2016-07-18S1631708ND
2016-07-18S1631706ND