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EWG's Tap Water Database — 2021 UPDATE

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Chlorodifluoromethane

City of Houston

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.

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103

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND520ND
2014ND510ND
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
2013-07-091307298-001BND
2013-07-091307338-001BND
2013-07-091307282-001BND
2013-07-091307286-001BND
2013-07-091307329-001BND
2013-07-091307283-001BND
2013-07-091307285-001BND
2013-07-101307327-001BND
2013-07-101307334-001BND
2013-07-101307328-001BND
2013-07-101307335-001BND
2013-07-101307330-001BND
2013-07-101307310-001BND
2013-07-101307331-001BND
2013-07-101307341-001BND
2013-07-161307536-001BND
2013-07-161307541-001BND
2013-07-161307534-001BND
2013-07-161307549-001BND
2013-07-161307555-001BND
2013-07-161307542-001BND
2013-07-161307552-001BND
2013-07-171307589-001BND
2013-07-171307592-001BND
2013-07-171307593-001BND
2013-07-171307543-001BND
2013-07-171307588-001BND
2013-07-171307590-001BND
2013-07-171307547-001BND
2013-07-171307546-001BND
2013-07-171307591-001BND
2013-07-301307A06-001BND
2013-07-301307A04-001AND
2013-07-301307A03-001AND
2013-07-311307A07-001BND
2013-08-061308222-001AND
2013-08-061308216-001AND
2013-08-061308220-001AND
2013-08-061308219-001AND
2013-08-061308221-001AND
2013-08-061308217-001AND
2013-08-061308218-001AND
2013-10-151310526-001BND
2013-10-151310596-001BND
2013-10-151310536-001BND
2013-10-151310525-001BND
2013-10-151310535-001BND
2013-10-151310524-001BND
2013-10-151310595-001BND
2013-10-161310594-001BND
2013-10-161310597-001BND
2013-10-161310593-001BND
2014-01-211401595-001BND
2014-01-211401602-001BND
2014-01-211401750-001BND
2014-01-211401596-001BND
2014-01-211401592-001BND
2014-01-211401597-001BND
2014-01-211401598-001BND
2014-01-211401600-001BND
2014-01-211401594-001BND
2014-01-211401593-001BND
2014-01-211401601-001BND
2014-01-211401599-001BND
2014-01-211401693-001BND
2014-01-211401603-001BND
2014-01-211401641-001BND
2014-01-221401639-001BND
2014-01-221401637-001BND
2014-01-221401636-001BND
2014-01-221401638-001BND
2014-01-221401640-001BND
2014-02-051402322-001BND
2014-02-051402196-001BND
2014-02-051402190-001BND
2014-02-051402211-001BND
2014-02-051402198-001BND
2014-02-051402193-001BND
2014-02-051402184-001BND
2014-02-051402199-001BND
2014-02-051402197-001BND
2014-02-051402205-001BND
2014-02-051402201-001BND
2014-02-051402185-001BND
2014-02-051402202-001BND
2014-02-051402192-001BND
2014-02-051402194-001BND
2014-02-051402186-001BND
2014-02-051402191-001BND
2014-02-051402187-001BND
2014-02-051402195-001BND
2014-02-051402189-001BND
2014-02-051402188-001BND
2014-02-051402200-001BND
2014-04-151404648-001BND
2014-04-151404649-001BND
2014-04-151404643-001BND
2014-04-151404646-001BND
2014-04-151404642-001BND
2014-04-151404645-001BND
2014-04-151404644-001BND
2014-04-161404647-001BND
2014-04-211404865-001BND