Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Franklin Water Supply

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0295 ppb42ND - 0.0590 ppb
20190.0420 ppb220.0420 ppb
2020ND20ND
20210.0205 ppb21ND - 0.0410 ppb
20220.0353 ppb330.0300 ppb - 0.0460 ppb
20230.0175 ppb21ND - 0.0350 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
2018-05-0335390226001ND
2018-05-0335390226001ND
2018-07-09354030360010.0590 ppb
2018-07-09354030360010.0590 ppb
2019-01-15354426840010.0420 ppb
2019-01-15354426840010.0420 ppb
2020-01-0735522561001ND
2020-09-2835581275001ND
2021-02-11356116680010.0410 ppb
2021-11-3035680898001ND
2022-01-0635688910 0010.0300 ppb
2022-01-06356889100010.0300 ppb
2022-07-28357355040010.0460 ppb
2023-01-30357765090010.0350 ppb
2023-10-0935833396001ND