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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Lemoore

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

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.610 ppb43ND - 1.40 ppb
20140.220 ppb51ND - 1.10 ppb
2015ND10ND
2016ND80ND
2017N/A00N/A
2018ND20ND
20190.0431 ppb131ND - 0.560 ppb

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
2013-10-21A3I1824-06A0.290 ppb
2013-10-21A3I1824-08AND
2013-10-21A3I1824-01A0.750 ppb
2013-10-21A3I1824-04A1.40 ppb
2014-04-09A4C1199-07AND
2014-04-09A4C1199-03AND
2014-04-09A4C1199-01AND
2014-07-235810-018-0935ND
2014-09-17A4I1060-01A1.10 ppb
2015-05-215810-020-1015ND
2016-04-185810-011-1020ND
2016-04-185810-010-1000ND
2016-04-185810-009-1355ND
2016-04-185810-008-1145ND
2016-05-025810-005-1045ND
2016-05-035810-006-0945ND
2016-08-235810-021-1115ND
2016-08-235810-022-1100ND
2018-02-065810-018-0740ND
2018-05-245810-020-1002ND
2019-05-145810-005-0935ND
2019-05-145810-011-1045ND
2019-05-145810-010-1015ND
2019-05-145810-009-0955ND
2019-10-195810-018-1105ND
2019-10-245810-018-0940ND
2019-11-125810-018-10000.560 ppb
2019-11-145810-018-1020ND
2019-11-205810-018-1245ND
2019-12-075810-018-0820ND
2019-12-135810-018-1300ND
2019-12-205810-021-1000ND
2019-12-205810-022-0930ND