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EWG's Tap Water Database — 2021 UPDATE

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Chlorodifluoromethane

North Alamo Water Supply Company

Chlorodifluoromethane (Freon 22) 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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND220ND
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A

ppb = parts per billion

All test results

Date Lab ID Result
2013-03-181303647-018DND
2013-03-181303647-016DND
2013-03-181303647-010DND
2013-03-181303647-008DND
2013-03-181303647-012DND
2013-03-181303647-014DND
2013-06-17Q1302491005ND
2013-06-17Q1302491009ND
2013-06-17Q1302491001ND
2013-06-17Q1302491003ND
2013-06-17Q1302491007ND
2013-09-19Q1307746007ND
2013-09-19Q1307746009ND
2013-09-19Q1307746003ND
2013-09-19Q1307746001ND
2013-09-19Q1307746011ND
2013-09-19Q1307746005ND
2013-12-10Q1316886003ND
2013-12-10Q1316886009ND
2013-12-10Q1316886005ND
2013-12-10Q1316886001ND
2013-12-10Q1316886007ND