Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Hexachlorocyclopentadiene

Great Oaks Water Company Inc.

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.

MORE ABOUT THIS CONTAMINANT

 

71

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015N/A00N/A
2016ND260ND
2017ND80ND
2018N/A00N/A
2019ND300ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-03-279590-013-1030ND
2014-05-159590-022-1450ND
2014-05-159590-021-1525ND
2014-05-159590-013-1115ND
2014-08-259590-022-1505ND
2014-08-259590-021-1545ND
2014-08-279590-013-1230ND
2016-05-249590-002-1140ND
2016-05-249590-013-0915ND
2016-05-249590-001-1055ND
2016-05-249590-008-1005ND
2016-05-259590-011-1015ND
2016-05-259590-009-0945ND
2016-05-259590-018-1140ND
2016-05-259590-015-1055ND
2016-05-259590-019-1300ND
2016-05-259590-025-1415ND
2016-05-259590-004-0850ND
2016-05-269590-023-1350ND
2016-08-229590-004-1230ND
2016-08-229590-009-1410ND
2016-08-229590-011-1325ND
2016-08-249590-018-1315ND
2016-08-249590-015-1450ND
2016-08-249590-023-1405ND
2016-08-249590-013-1230ND
2016-08-259590-019-1350ND
2016-08-259590-001-1205ND
2016-08-259590-002-1435ND
2016-08-259590-008-1255ND
2016-09-069590-007-1400ND
2016-09-289590-025-1400ND
2016-11-029590-025-1115ND
2017-03-089590-025-0930ND
2017-04-139590-006-1000ND
2017-04-139590-022-1050ND
2017-04-139590-021-1120ND
2017-08-309590-021-1510ND
2017-08-319590-025-1440ND
2017-08-319590-022-1515ND
2017-10-029590-010-1530ND
2019-05-219590-008-1415ND
2019-05-219590-002-0915ND
2019-05-219590-006-1100ND
2019-05-219590-007-1000ND
2019-05-219590-001-1500ND
2019-05-229590-010-1045ND
2019-05-229590-015-1310ND
2019-05-229590-009-1350ND
2019-05-229590-013-1510ND
2019-06-279590-004-0930ND
2019-06-279590-011-1000ND
2019-06-279590-018-1030ND
2019-06-279590-025-1100ND
2019-06-279590-023-1120ND
2019-08-209590-019-1000ND
2019-08-289590-002-1030ND
2019-08-289590-001-1420ND
2019-08-289590-007-1120ND
2019-08-289590-006-0920ND
2019-08-299590-004-1310ND
2019-08-299590-015-0850ND
2019-08-299590-008-1410ND
2019-08-299590-009-0745ND
2019-08-299590-018-1000ND
2019-09-059590-019-1145ND
2019-09-059590-025-1250ND
2019-09-059590-023-1400ND
2019-09-129590-011-1300ND
2019-09-129590-013-1430ND
2019-09-129590-010-1145ND