Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Monroe 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20190.0335 ppb42ND - 0.0670 ppb
2020ND20ND
2021ND20ND
2022ND20ND
20230.0325 ppb220.0270 ppb - 0.0380 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
2018-01-1035367821001ND
2018-01-1035367821001ND
2018-07-3035407880001ND
2018-07-3035407880001ND
2019-01-14354426030010.0670 ppb
2019-01-14354426030010.0670 ppb
2019-07-3135486743001ND
2019-07-3135486743001ND
2020-01-0635523114001ND
2020-07-1635564002001ND
2021-02-0235608834002ND
2021-09-2335666240001ND
2022-01-1835692112001ND
2022-08-1535741176001ND
2023-02-06357781770010.0270 ppb
2023-07-18358140920010.0380 ppb