Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Newellton Water System

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.0295 ppb440.0230 ppb - 0.0360 ppb
2020ND20ND
2021ND20ND
20220.0135 ppb21ND - 0.0270 ppb
20230.0350 ppb220.0300 ppb - 0.0400 ppb

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
2018-07-3035407879001ND
2018-07-3035407879001ND
2019-01-14354426030020.0360 ppb
2019-01-14354426030020.0360 ppb
2019-07-31354867380010.0230 ppb
2019-07-31354867380010.0230 ppb
2020-01-0635523110001ND
2020-08-1235570543001ND
2021-01-1835605842002ND
2021-09-1535664395001ND
2022-01-18356921120020.0270 ppb
2022-08-1535741176002ND
2023-02-06357781770030.0400 ppb
2023-07-18358140940010.0300 ppb