Know Your Environment. Protect Your Health.

Heptachlor epoxide

Quinlan North Subdivision

NOTE: Quinlan North Subdivision purchases water from Cash SUD which is required to test for heptachlor epoxide. Sample information shown below was taken by Cash SUD.

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

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND40ND
2021ND20ND
2022ND10ND
2023ND10ND

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

NOTE: Quinlan North Subdivision purchases water from Cash SUD which is required to test for heptachlor epoxide. Sample information shown below was taken by Cash SUD.

Date Lab ID Result
2018-02-12Q1805646006ND
2019-02-21Q1907745001ND
2020-02-04Q2004530001ND
2021-07-13Q2118249001ND
2022-07-26Q2221173003ND
2023-10-24Q2345749001ND