Know Your Environment. Protect Your Health.

Heptachlor

Concho Rural Water Pecan Creek

NOTE: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for heptachlor. Sample information shown below was taken by City of San Angelo.

Heptachlor is an insecticide used for termite control until 1988. It is linked to cancer, hormone disruption and neurotoxicity.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND30ND
2022ND10ND
2023ND10ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.008 ppb

The EWG Health Guideline of 0.008 ppb for heptachlor 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): 0.4 ppb

The legal limit for heptachlor, 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 due to heptachlor exposure.

ppb = parts per billion

All test results

NOTE: Concho Rural Water Pecan Creek purchases water from City of San Angelo which is required to test for heptachlor. Sample information shown below was taken by City of San Angelo.

Date Lab ID Result
2018-02-28Q1808687003ND
2019-05-07Q1920785004ND
2020-02-18Q2006105003ND
2021-04-27Q2110656001ND
2021-07-20Q2119111001ND
2021-11-22Q2132528001ND
2022-02-14Q2205298001ND
2022-05-02Q2213012001ND
2023-02-15Q2306325008ND