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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Smyrna Water Department

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)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.00547 ppb32ND - 0.00970 ppb
2014ND30ND
2015N/A00N/A
2016ND60ND
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
2013-11-2035117221005ND
2013-11-20351172210040.00670 ppb
2013-11-20351172210030.00970 ppb
2014-03-2435131615003ND
2014-03-2435131615002ND
2014-03-2435131615001ND
2016-11-302193089019ND
2016-11-302193089018ND
2016-11-302193089017ND
2016-11-302193089009ND
2016-11-302193089008ND
2016-11-302193089007ND