Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Cottonwood Hills Estates

Hexachlorocyclopentadiene was historically used for the manufacture of currently banned pesticides, such as endrin, dieldrin and chlordane. It’s still used for production of flame retardants, resins and plastics.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020N/A00N/A
2021ND50ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 2 ppb

The EWG Health Guideline of 2 ppb for hexachlorocyclopentadiene 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 harm to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL): 50 ppb

The legal limit for hexachlorocyclopentadiene, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-02-13Q1805887005ND
2018-02-13Q1805887006ND
2021-03-16Q2106819001ND
2021-06-16Q2115846001ND
2021-08-18Q2122395001ND
2021-09-13Q2124824001ND
2021-12-08Q2134355001ND
2022-03-22AF91417ND
2022-06-06Q2215733001ND
2022-09-19Q2227946001ND
2022-11-28Q2235276001ND
2023-02-21Q2307018003ND
2023-05-08Q2317259001ND
2023-09-07Q2338617001ND
2023-12-04Q2351276002ND