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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

City of Corpus Christi

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
2012ND10ND
2013ND40ND
2014ND10ND
2015ND10ND
2016ND10ND
2017ND50ND

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
2012-01-251201639003ND
2013-02-13AC10495ND
2013-06-24AC23018ND
2013-08-09AC27512ND
2013-12-20AC38193ND
2014-03-24AC48195ND
2015-02-17AC80789ND
2016-02-10AD23185ND
2017-01-18AD65522ND
2017-03-21AD76162ND
2017-05-16AD84515ND
2017-07-28AD91469ND
2017-11-14AE04820ND