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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor epoxide

Florence Water Company

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
2012ND60ND
2013N/A00N/A
2014N/A00N/A
2015ND60ND
2016N/A00N/A
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
2012-02-23201202240031SND
2012-02-23201202240032SND
2012-02-23201202240033SND
2012-07-26201207270207SND
2012-07-26201207270208SND
2012-07-26201207270209SND
2015-03-03201503040112SND
2015-03-03201503040113SND
2015-03-03201503040114SND
2015-06-16201506160584SND
2015-06-16201506160585SND
2015-06-16201506160586SND