Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Trichlorofluoromethane

Halfway Water Supply Corporation

Trichlorofluoromethane (Freon 11) 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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND10ND
2016ND30ND
2017ND20ND
2018ND20ND
2019ND20ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1,300 ppb

The EWG Health Guideline of 1,300 ppb for trichlorofluoromethane 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 internal organs.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-04Q1403564001ND
2014-06-26Q1424208002ND
2014-09-03Q1441295002ND
2015-04-23Q1515199002ND
2016-03-17AD29325ND
2016-09-08Q1636368001ND
2016-09-08Q1636368003ND
2017-11-14Q1758338002ND
2017-11-14Q1758338008ND
2018-05-17Q1820244002ND
2018-05-17Q1820244004ND
2019-04-11Q1914703002ND
2019-04-11Q1914703004ND