Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Gretna Waterworks

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0480 ppb440.0440 ppb - 0.0520 ppb
20190.0370 ppb440.0180 ppb - 0.0560 ppb
2020ND20ND
20210.0290 ppb220.0260 ppb - 0.0320 ppb
2022ND20ND
20230.0320 ppb220.0310 ppb - 0.0330 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
2018-04-17353869540030.0440 ppb
2018-04-17353869540030.0440 ppb
2018-10-02354217660010.0520 ppb
2018-10-02354217660010.0520 ppb
2019-02-05354467300010.0180 ppb
2019-02-05354467300010.0180 ppb
2019-08-14354904130010.0560 ppb
2019-08-14354904130010.0560 ppb
2020-03-1835538511001ND
2020-10-2635587648001ND
2021-03-01356157310010.0320 ppb
2021-12-08356836660020.0260 ppb
2022-01-1335690761001ND
2022-08-0435737249001ND
2023-02-01357771800010.0330 ppb
2023-10-11358341600010.0310 ppb