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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Vacaville

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

 

57

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
2014ND250ND
2015ND30ND
2016ND50ND
2017ND110ND
2018N/A00N/A
2019ND10ND

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
2013-09-10A3H2159-08AND
2013-09-10A3H2184-04AND
2013-09-10A3H2184-01AND
2013-09-10A3H2159-01AND
2013-09-10A3H2184-06AND
2013-09-10A3H2159-04AND
2013-09-10A3H2159-06AND
2013-09-10A3H2184-08AND
2013-09-10A3H2184-10AND
2013-12-04A3K1582-01AND
2013-12-04A3K1577-04AND
2013-12-04A3K1577-01AND
2014-01-139590-027-0904ND
2014-01-215810-012-1233ND
2014-01-215810-010-1002ND
2014-01-215810-024-1255ND
2014-01-215810-009-1029ND
2014-01-215810-007-0931ND
2014-01-215810-006-1054ND
2014-01-215810-004-1142ND
2014-01-215810-030-1314ND
2014-01-215810-003-1117ND
2014-01-215810-001-1206ND
2014-03-12A4B2066-06AND
2014-03-12A4B2083-04AND
2014-03-12A4B2083-01AND
2014-03-12A4B2066-08AND
2014-03-12A4B2077-01AND
2014-03-12A4B2066-01AND
2014-04-079590-027-0823ND
2014-05-26A4E1241-04AND
2014-05-26A4E1241-01AND
2014-05-26A4E1247-01AND
2014-06-185810-011-1201ND
2014-06-185810-002-0740ND
2014-07-149590-027-0827ND
2014-10-069590-027-0852ND
2015-07-139590-027-0924ND
2015-08-045810-011-1053ND
2015-10-059590-027-0805ND
2016-01-139590-027-0750ND
2016-04-119590-027-0918ND
2016-07-129590-027-0924ND
2016-07-265810-011-1201ND
2016-10-129590-027-1116ND
2017-01-105810-024-1035ND
2017-01-245810-001-1000ND
2017-01-245810-009-0813ND
2017-01-245810-006-0840ND
2017-01-245810-003-0935ND
2017-01-245810-002-0903ND
2017-02-025810-012-1041ND
2017-02-025810-030-1111ND
2017-02-025810-010-1002ND
2017-03-235810-007-1146ND
2017-08-175810-011-1136ND
2019-08-275810-011-1034ND