Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Heptachlor epoxide

City of Corsicana

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

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

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
2012-01-041201067006ND
2012-01-041201067005ND
2013-01-171301464006ND
2013-01-171301464005ND
2014-05-15Q1416551012ND
2014-05-15Q1416551011ND
2015-01-28Q1503409002ND
2015-01-28Q1503409001ND
2016-02-02Q1604417002ND
2016-02-02Q1604417001ND
2017-01-17Q1702000005ND
2017-06-14Q1724758001ND