Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chloromethane

Florin County Water District

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
20132.25 ppb41ND - 9.00 ppb
2014ND160ND
2015ND180ND
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
2012-05-305810-009-0956ND
2012-08-295810-003-0937ND
2013-04-155810-012-13259.00 ppb
2013-07-185810-007-0914ND
2013-12-125810-006-1427ND
2013-12-125810-007-0950ND
2014-04-305810-002-1017ND
2014-04-305810-003-0927ND
2014-04-305810-004-1054ND
2014-04-305810-006-1241ND
2014-04-305810-007-0841ND
2014-04-305810-009-1200ND
2014-05-21106918PND
2014-05-21106919PND
2014-05-21106915PND
2014-05-21106922PND
2014-05-21106920PND
2014-08-075810-010-1305ND
2014-11-19109649PND
2014-11-19109651PND
2014-11-19109647PND
2014-11-19109650PND
2015-02-115810-004-1115ND
2015-02-115810-007-0906ND
2015-02-115810-006-1402ND
2015-02-115810-010-1305ND
2015-02-115810-009-1216ND
2015-02-115810-012-0948ND
2015-05-06110958RND
2015-05-275810-004-1053ND
2015-05-275810-006-1258ND
2015-05-275810-003-1012ND
2015-05-275810-009-1159ND
2015-05-275810-012-0923ND
2015-09-235810-007-0932ND
2015-09-235810-009-1247ND
2015-09-235810-004-1147ND
2015-09-235810-012-1009ND
2015-09-235810-003-1044ND
2015-09-235810-006-1336ND