Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Meriden Water Division

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.

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019ND200ND
2020ND60ND
2021ND130ND
2022ND130ND
2023ND190ND

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
2018-07-26CA98736ND
2018-07-26CA98737ND
2018-07-26CA98738ND
2018-07-26CA98739ND
2018-07-26CA98735ND
2018-10-24CB81094ND
2018-10-24CB81095ND
2019-01-16CC30223ND
2019-01-16CC30225ND
2019-01-16CC30226ND
2019-03-06CC63089ND
2019-04-17CC96464ND
2019-04-25CD01541ND
2019-04-25CD01542ND
2019-04-29CD03411ND
2019-05-29CD22755ND
2019-06-19CD38006ND
2019-06-19CD38007ND
2019-06-19CD38013ND
2019-06-26CD42471ND
2019-06-26CD42472ND
2019-06-26CD42473ND
2019-07-03CD50737ND
2019-07-03CD50736ND
2019-07-31CD69100ND
2019-09-25CE17376ND
2019-12-16CE88625ND
2020-06-10CG10478ND
2020-06-17CG16089ND
2020-06-17CG16090ND
2020-06-17CG16091ND
2020-06-24CG20610ND
2020-06-24CG20609ND
2021-06-07CI45713ND
2021-06-07CI45714ND
2021-06-07CI45715ND
2021-06-07CI45716ND
2021-06-07CI45717ND
2021-06-07CI45718ND
2021-06-09CI51083ND
2021-06-09CI51086ND
2021-06-09CI51084ND
2021-06-09CI51085ND
2021-06-23CI60841ND
2021-06-23CI60842ND
2021-08-25CJ13495ND
2022-04-14CL08938ND
2022-04-20CL12764ND
2022-04-20CL12763ND
2022-04-20CL12759ND
2022-04-20CL12758ND
2022-04-20CL12757ND
2022-05-25CL38208ND
2022-06-01CL45774ND
2022-06-01CL45775ND
2022-06-01CL45776ND
2022-06-01CL45777ND
2022-06-01CL45778ND
2022-06-27CL64556ND
2023-01-30CN32209ND
2023-01-30CN32220ND
2023-01-30CN32216ND
2023-01-30CN32215ND
2023-01-30CN32211ND
2023-01-30CN32210ND
2023-02-08CN38286ND
2023-03-08CN55433ND
2023-03-13CN58725ND
2023-03-15CN60221ND
2023-03-15CN60222ND
2023-03-22CN65581ND
2023-04-05CN76398ND
2023-05-24CO13395ND
2023-05-24CO13394ND
2023-05-31CO16784ND
2023-05-31CO16785ND
2023-07-19CO54216ND
2023-10-04CP16968ND