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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

Los Angeles Department of Water and Power

Chloromethane is an industrial solvent, aerosol propellant and a refrigerant. It also forms as a byproduct of water disinfection. The EPA classifies chloromethane as possibly carcinogenic to humans.

 

38

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
2013ND290ND
2014ND90ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 2.69 ppb

The EWG Health Guideline of 2.69 ppb for chloromethane was defined by the Environmental Protection Agency as a benchmark for testing under the Unregulated Contaminant Monitoring Rule program. This health guideline protects against cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2013-04-09AW06664ND
2013-04-10AW06734ND
2013-04-10AW06672ND
2013-04-10AW06676ND
2013-04-10AW06730ND
2013-04-11AW06668ND
2013-04-11AW06680ND
2013-04-11AW06722ND
2013-04-11AW06726ND
2013-04-11AW06714ND
2013-04-11AW06718ND
2013-07-24AW14345ND
2013-07-24AW14349ND
2013-07-24AW14341ND
2013-07-24AW14353ND
2013-07-25AW14487ND
2013-07-25AW14483ND
2013-07-25AW14491ND
2013-07-25AW14479ND
2013-10-29AW21558ND
2013-10-29AW21554ND
2013-10-29AW21550ND
2013-10-29AW21562ND
2013-10-30AW21588ND
2013-10-30AW21580ND
2013-10-30AW21584ND
2013-10-30AW21576ND
2013-10-31AW21570ND
2013-10-31AW21566ND
2014-03-18AX05578ND
2014-03-18AX05572ND
2014-03-18AX05576ND
2014-03-19AX05666ND
2014-03-19AX05670ND
2014-03-19AX05662ND
2014-03-20AX05768ND
2014-03-20AX05772ND
2014-03-20AX05776ND