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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Santa Barbara Water Department

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND20ND
20140.0167 ppb151ND - 0.250 ppb
2015ND20ND
2016ND20ND
2017ND40ND

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
2012-07-189590-005-0923ND
2013-08-189590-031-1605ND
2013-10-079590-022-1215ND
2014-03-17201403180207AMND
2014-03-18201403190597AMND
2014-03-18201403190587AMND
2014-03-25201403260346AMND
2014-06-11201406120329AMND
2014-06-11201406120320AM0.250 ppb
2014-09-24201409250531AMND
2014-09-24201409250511AMND
2014-09-24201409250519AMND
2014-10-219590-042-0758ND
2014-10-219590-015-0843ND
2014-10-219590-035-0931ND
2014-10-229590-004-1014ND
2014-12-17201412180230AMND
2014-12-23201412240447AMND
2015-05-129590-055-0842ND
2015-11-109590-005-1050ND
2016-11-029590-053-1152ND
2016-11-029590-031-1120ND
2017-05-189590-058-1734ND
2017-11-079590-004-0955ND
2017-11-149590-042-0848ND
2017-11-149590-035-0930ND