Know Your Environment. Protect Your Health.

Hexachlorocyclopentadiene

Walnut Grove Utilities

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.

 

85

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND130ND
2020ND70ND
2021ND130ND
2022ND240ND
2023ND230ND

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
2018-06-12680-153971-1ND
2018-06-13680-154051-1ND
2018-07-03680-154927-1ND
2018-07-10680-155198-1ND
2018-10-16680-159419-1ND
2019-02-26680-165155-1ND
2019-02-26680-165150-1ND
2019-03-05680-165488-1ND
2019-03-05680-165490-1ND
2019-03-12680-165969-1ND
2019-04-02680-167063-1ND
2019-04-02680-167058-1ND
2019-04-09680-167502-1ND
2019-04-09680-167500-1ND
2019-07-16680-171850-1ND
2019-07-16680-171849-1ND
2019-08-07680-172772-1ND
2019-08-07680-172766-1ND
2020-03-11481035ND
2020-03-12481037ND
2020-06-11488369ND
2020-09-02497133ND
2020-09-02497129ND
2020-11-17504183ND
2020-11-17504181ND
2021-03-181034634-01ND
2021-03-181034633-01ND
2021-04-221044869-01ND
2021-04-291052161-01ND
2021-05-061052823-01ND
2021-05-131054055-01ND
2021-09-24810-3700-1ND
2021-09-24810-3699-1ND
2021-09-24810-3698-1ND
2021-10-12810-5182-1ND
2021-12-28810-11025-1ND
2021-12-29810-11326-2ND
2021-12-29810-11220-1ND
2022-03-08810-17508-1AND
2022-03-08810-17505-1AND
2022-03-08810-17576-1AND
2022-03-08810-17573-1AND
2022-03-09FWC0111BND
2022-03-09810-18451-1AND
2022-03-09810-18448-1ND
2022-03-14FWC0176-01SND
2022-03-23810-18980-1SND
2022-05-16FWF0001-01BND
2022-05-16FWE0086ND
2022-05-16FWE0085-01ND
2022-05-16FWE0082-01AND
2022-07-11FWG0325ND
2022-07-11FWG0313ND
2022-07-11FWG0322ND
2022-09-21FWI0536-01ND
2022-09-28FWJ0040ND
2022-09-28FWJ0039ND
2022-10-26FWJ0180-01ND
2022-11-14FWJ0183-01ND
2022-11-15FWJ0189-01ND
2022-11-15FWJ0173-01ND
2022-12-14810-47844-1ND
2023-02-06FXB0073-01ND
2023-02-07FXB0069-01ND
2023-02-07FXB0060-01ND
2023-02-09FXB0076-01ND
2023-02-15FXB0432-01ND
2023-02-15FXB0430-01ND
2023-02-15FXB00446-01ND
2023-02-16FXB0071-01ND
2023-04-04FXC0540ND
2023-04-04FXC0511ND
2023-04-05FXC0556ND
2023-04-05FXC0562ND
2023-04-05FXC0551ND
2023-04-05FXC0547ND
2023-04-06FXC0505ND
2023-05-01FXD0496ND
2023-07-31FXF0578ND
2023-07-31FXF0567ND
2023-08-02FXF0582ND
2023-08-02FXF0571ND
2023-11-1468354201ND
2023-11-1468354401ND
2023-11-1468354301ND