Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Natchitoches 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
2019ND40ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-01-2235370029001ND
2018-01-2235370029001ND
2018-07-3135408508001ND
2018-07-3135408508001ND
2019-02-2535450970001ND
2019-02-2535450970001ND
2019-08-0735490086001ND
2019-08-0735490086001ND
2020-02-1735531798001ND
2020-09-1735578824001ND
2021-01-2035606276001ND
2021-08-1835657244006ND
2022-01-2635693462007ND
2022-08-0835738986005ND
2023-03-0635784946004ND
2023-08-2235823297001ND