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EWG's Tap Water Database — 2021 UPDATE

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Hexachlorocyclopentadiene

City of Sherman

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND150ND
2016ND50ND
2017ND50ND
2018ND100ND
2019ND50ND

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
2014-04-22Q1412762002ND
2014-04-22Q1412762001ND
2014-08-20Q1438015028ND
2014-08-20Q1438015027ND
2015-03-17Q1509888002ND
2015-03-17Q1509888001ND
2015-04-23Q1515169035ND
2015-04-23Q1515169032ND
2015-04-23Q1515169033ND
2015-04-23Q1515169034ND
2015-04-23Q1515169036ND
2015-04-23Q1515169018ND
2015-04-23Q1515169019ND
2015-04-23Q1515169020ND
2015-07-22Q1528508004ND
2015-07-22Q1528508003ND
2015-09-09Q1535058001ND
2015-11-03Q1543355006ND
2015-11-03Q1543355001ND
2016-01-20Q1602479016ND
2016-01-20Q1602479015ND
2016-04-11Q1614214013ND
2016-04-11Q1614214005ND
2016-11-08Q1648503001ND
2017-01-12Q1701556003ND
2017-01-12Q1701556008ND
2017-10-10Q1751594033ND
2017-10-10Q1751594032ND
2017-11-14Q1758437003ND
2018-01-10Q1801240016ND
2018-01-10Q1801240013ND
2018-01-10Q1801240014ND
2018-01-10Q1801240015ND
2018-01-10Q1801240017ND
2018-01-10Q1801240018ND
2018-01-10Q1801240019ND
2018-07-05Q1826605003ND
2018-08-20Q1833198001ND
2018-11-29Q1848810002ND
2019-02-12Q1906434010ND
2019-02-12Q1906434009ND
2019-02-12Q1906434008ND
2019-05-07Q1922272013ND
2019-05-07Q1922272014ND