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EWG's Tap Water Database — 2019 UPDATE

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Trichlorofluoromethane

Holliston Water Department

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND90ND
2015ND60ND
2016ND60ND
2017ND60ND

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 Result
2014-03-12ND
2014-06-12ND
2014-06-12ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2014-06-16ND
2014-09-09ND
2014-11-04ND
2015-05-05ND
2015-05-05ND
2015-05-12ND
2015-05-19ND
2015-05-19ND
2015-05-19ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-03ND
2016-05-24ND
2016-05-24ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND
2017-05-16ND