Know Your Environment. Protect Your Health.

Heptachlor epoxide

Lakeway Harbor Subdivision

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

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
2022ND40ND
2023ND40ND

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
2018-02-14Q1806270008ND
2018-05-25Q1821195001ND
2018-08-29Q1834582002ND
2018-10-31Q1843764002ND
2019-03-20Q1911659007ND
2019-06-04Q1931262001ND
2019-09-04Q1962213001ND
2019-11-06Q1975669001ND
2020-03-18Q2012015003ND
2020-06-04Q2022351001ND
2020-09-11Q2036329001ND
2020-11-12Q2044754003ND
2021-03-10Q2106424001ND
2021-05-26Q2113682001ND
2021-08-16Q2121818001ND
2021-10-12Q2128285001ND
2022-01-10Q2200510001ND
2022-06-13Q2216381002ND
2022-08-25Q2225377001ND
2022-10-21Q2232016001ND
2023-01-12Q2301979004ND
2023-04-27Q2315894001ND
2023-07-27Q2330258001ND
2023-10-13Q2343890001ND