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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

City of Wichita Falls

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

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND20ND
2014ND30ND
2015ND40ND
2016ND10ND
2017ND10ND

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
2012-03-271203944002ND
2012-05-161205609003ND
2012-05-161205609004ND
2012-09-121209458001ND
2013-03-261303A43005ND
2013-03-261303A43006ND
2014-05-13Q1415816001ND
2014-08-14Q1436796020ND
2014-11-12AC71871ND
2015-02-09Q1505019004ND
2015-02-09Q1505019003ND
2015-05-11Q1517193001ND
2015-09-22Q1537019001ND
2016-02-01Q1604190001ND
2017-08-07Q1733093006ND