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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Doyon Utilities Jber - Richardson

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

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND160ND
2013N/A00N/A
2014N/A00N/A
2015ND120ND
2016ND10ND
2017ND40ND

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
2012-01-23PE*2581089ND
2012-01-23PE*2581103ND
2012-01-23PE*2581110ND
2012-01-23PE*2581113ND
2012-01-23PE*2581076ND
2012-04-23PE*2629745ND
2012-04-23PE*2629761ND
2012-04-23PE*2629782ND
2012-04-23PE*2629807ND
2012-07-24PE*2682052ND
2012-07-24PE*2682124ND
2012-07-24PE*2682077ND
2012-11-26PE*2745626ND
2012-11-26PE*2745640ND
2012-11-26PE*2745650ND
2012-11-26PE*2745660ND
2015-02-24PE*3195308ND
2015-02-24PE*3195672ND
2015-02-24PE*3195339ND
2015-06-23PE*3268442ND
2015-06-23PE*3268599ND
2015-06-23PE*3268614ND
2015-09-14PE*3322324ND
2015-09-14PE*3322335ND
2015-09-14PE*3322352ND
2015-12-07PE*3371143ND
2015-12-07PE*3371156ND
2015-12-07PE*3371166ND
2016-03-29PE*3422157ND
2017-03-06PE*3649762ND
2017-05-22PE*3698683ND
2017-08-28PE*3767824ND
2017-10-11PE*3797936ND