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EWG's Tap Water Database — 2019 UPDATE

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Chloromethane

City of Manteca

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.

 

55

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013ND300ND
2014ND70ND
2015ND50ND
2016ND40ND
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
2012-02-085810-040-1035ND
2012-02-085810-049-1130ND
2012-03-135810-013-1000ND
2012-06-125810-049-0717ND
2012-11-135810-044-1033ND
2013-03-135810-032-0640ND
2013-04-105810-012-0805ND
2013-05-14A3E1304-01AND
2013-05-22A3E1910-26AND
2013-05-22A3E1910-24AND
2013-05-22A3E1910-22AND
2013-05-22A3E1910-08AND
2013-05-22A3E1910-01AND
2013-05-22A3E1910-03AND
2013-05-22A3E1910-12AND
2013-05-22A3E1910-19AND
2013-05-22A3E1910-15AND
2013-05-22A3E1910-10AND
2013-05-22A3E1910-17AND
2013-06-055810-034-0825ND
2013-06-055810-038-0745ND
2013-08-145810-014-0810ND
2013-09-17A3I0394-01AND
2013-11-18A3J2218-15AND
2013-11-19A3J2218-17AND
2013-11-19A3J2218-13AND
2013-11-19A3J2218-21AND
2013-11-19A3J2218-05AND
2013-11-19A3J2218-19AND
2013-11-19A3J2218-01AND
2013-11-19A3J2230-01AND
2013-11-19A3J2218-07AND
2013-11-19A3J2218-09AND
2013-11-19A3J2218-03AND
2013-11-19A3J2218-11AND
2014-01-145810-042-1055ND
2014-01-145810-036-0906ND
2014-02-115810-030-0835ND
2014-04-23A4D1242-01AND
2014-06-105810-015-0720ND
2014-07-085810-016-0715ND
2014-07-085810-028-0803ND
2015-02-105810-040-0820ND
2015-06-095810-049-0650ND
2015-07-215810-034-0812ND
2015-11-305810-044-1005ND
2015-12-095810-013-0625ND
2016-03-085810-032-0540ND
2016-04-195810-012-0920ND
2016-06-145810-038-0645ND
2016-08-235810-014-0715ND
2017-04-045810-042-0535ND
2017-07-105810-028-0847ND
2017-07-105810-016-0800ND
2017-08-085810-015-0625ND