Know Your Environment. Protect Your Health.

Heptachlor epoxide

Valley Utilities Water Company Glendale

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019N/A00N/A
2020N/A00N/A
2021ND80ND
2022ND40ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-03-01201803010276SND
2018-03-01201803010277SND
2018-03-07201803070705SND
2018-03-07201803070704SND
2018-07-19201807190547SND
2018-07-19201807190548SND
2018-07-19201807190549SND
2018-07-19201807190550SND
2021-03-03202103040011SND
2021-03-03202103040012SND
2021-03-03202103040010SND
2021-03-11202103120008SND
2021-04-14202104150268SND
2021-04-14202104150269SND
2021-04-14202104150270SND
2021-04-14202104150271SND
2022-02-02202202030108SND
2022-04-27202204280128SND
2022-07-07380-7658-1ND
2022-10-05380-23186-1ND