Know Your Environment. Protect Your Health.

Heptachlor

City of Bowie

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

 

12

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
2021ND40ND
2022ND40ND
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

Date Lab ID Result
2018-06-05Q1822320001ND
2019-02-20Q1907486001ND
2020-03-18Q2011976001ND
2021-03-10Q2106369001ND
2021-05-12Q2112415001ND
2021-09-22Q2125955001ND
2021-11-29Q2132835001ND
2022-03-07Q2207648001ND
2022-05-11Q2214197003ND
2022-08-03Q2222249005ND
2022-10-11Q2230700003ND
2023-01-24Q2303291002ND