Know Your Environment. Protect Your Health.

Heptachlor epoxide

City Of Glen Rose

NOTE: City Of Glen Rose purchases water from Somervell County Water District - Wheele which is required to test for heptachlor epoxide. Sample information shown below was taken by Somervell County Water District - Wheele.

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
2018ND40ND
2019ND20ND
2020ND40ND
2021ND70ND
2022ND80ND
2023ND80ND

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: City Of Glen Rose purchases water from Somervell County Water District - Wheele which is required to test for heptachlor epoxide. Sample information shown below was taken by Somervell County Water District - Wheele.

Date Lab ID Result
2018-04-26Q1817130001ND
2019-02-13Q1906633003ND
2020-11-03Q2042995005ND
2021-06-01Q2114024001ND
2022-02-22Q2206240001ND
2023-10-11Q2343452003ND