Know Your Environment. Protect Your Health.

Heptachlor

Fort Bend County Municipal Utility District 46

NOTE: Fort Bend County Municipal Utility District 46 purchases water from City of Missouri City Mustang Bayou Wate which is required to test for heptachlor. Sample information shown below was taken by City of Missouri City Mustang Bayou Wate.

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
2018ND20ND
2019ND10ND
2020ND10ND
2021ND20ND
2022ND30ND
2023ND20ND

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: Fort Bend County Municipal Utility District 46 purchases water from City of Missouri City Mustang Bayou Wate which is required to test for heptachlor. Sample information shown below was taken by City of Missouri City Mustang Bayou Wate.

Date Lab ID Result
2018-05-01AE24659ND
2018-05-01AE24662ND
2019-04-18AE63046ND
2019-04-18AE63047ND
2020-08-31AF25893ND
2021-02-26AF44746ND
2021-05-12AF53674ND
2022-05-17AF97323ND
2022-05-17AF97324ND