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EWG's Tap Water Database — 2021 UPDATE

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Dichlorodifluoromethane

Golden State Water Company - Cowan Heights

Dichlorodifluoromethane (Freon-12) is a refrigerant, solvent and aerosol propellant banned in 2000 under the Montreal Protocol because of its ozone-depleting properties. Freons can cause heart, nervous system and liver damage.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND20ND
2016ND20ND
2017ND20ND
2018ND20ND
2019ND40ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-194417-001-0940ND
2014-02-194417-004-0925ND
2015-02-024417-001-0830ND
2015-02-024417-004-0850ND
2016-01-194417-001-0835ND
2016-01-194417-004-0850ND
2017-01-104417-001-0925ND
2017-01-104417-004-0940ND
2018-01-084417-001-0930ND
2018-01-084417-004-0905ND
2019-03-254417-001-0855ND
2019-03-254417-004-0840ND
2019-04-174417-004-1000ND
2019-04-174417-004-1005ND