Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Loma Linda Power Plant

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.

MORE ABOUT THIS CONTAMINANT

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND30ND
2015ND30ND
2016ND30ND
2017ND30ND
2018ND90ND
2019ND80ND

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
2014-05-074790-002-0840ND
2014-07-214790-002-0718ND
2014-09-174790-002-0800ND
2015-06-254790-002-0917ND
2015-09-184790-002-0630ND
2015-11-114790-002-0735ND
2016-05-164790-002-0815ND
2016-07-274790-002-0700ND
2016-07-274790-003-0700ND
2017-09-135810-001-1300ND
2017-11-285810-002-0832ND
2017-11-285810-004-0810ND
2018-05-085810-002-0955ND
2018-05-085810-004-0915ND
2018-07-115810-002-0640ND
2018-07-115810-004-0625ND
2018-09-105810-004-0800ND
2018-09-105810-002-0820ND
2018-11-125810-002-0910ND
2018-11-125810-004-0840ND
2018-11-295810-004-1250ND
2019-05-145810-004-0740ND
2019-05-145810-002-0650ND
2019-07-155810-004-0840ND
2019-07-155810-002-0815ND
2019-09-105810-004-0620ND
2019-09-105810-002-0730ND
2019-11-125810-002-0735ND
2019-11-125810-004-0720ND