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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

SJWTX Triple Peak Plant

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

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND190ND
2014ND60ND
2015ND60ND
2016ND70ND
2017ND120ND
2018ND90ND
2019ND80ND

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
2013-06-18Q1302518009ND
2013-06-18Q1302518001ND
2013-06-18Q1302518003ND
2013-06-18Q1302518017ND
2013-06-18Q1302518011ND
2013-06-19Q1302518007ND
2013-06-19Q1302518005ND
2013-06-19Q1302518015ND
2013-06-19Q1302518013ND
2013-09-25Q1308037001ND
2013-12-16Q1318114009ND
2013-12-16Q1318114007ND
2013-12-16Q1318114001ND
2013-12-16Q1318114003ND
2013-12-16Q1318114015ND
2013-12-17Q1318114013ND
2013-12-17Q1318114011ND
2013-12-17Q1318114017ND
2013-12-17Q1318114005ND
2014-03-31AC48694ND
2014-04-17AC51098ND
2014-06-24AC57808ND
2014-06-24AC57804ND
2014-06-24AC57812ND
2014-07-24AC60887ND
2015-06-03AC94443ND
2015-06-03AC94413ND
2015-06-03AC94433ND
2015-06-03AC94415ND
2015-08-05AD02661ND
2015-11-03AD12401ND
2016-01-26AD20098ND
2016-01-26AD20094ND
2016-01-26AD20106ND
2016-04-22AD33995ND
2016-07-26AD45733ND
2016-07-26AD45721ND
2016-12-01AD59882ND
2017-02-01AD68121ND
2017-02-01AD68127ND
2017-05-03AD82811ND
2017-05-03AD82809ND
2017-05-31AD86169ND
2017-05-31AD86145ND
2017-05-31AD86143ND
2017-05-31AD86159ND
2017-06-26AD87809ND
2017-06-26AD87805ND
2017-07-27AD91116ND
2017-07-27AD91124ND
2018-04-23AE23473ND
2018-04-23AE23479ND
2018-06-20AE30798ND
2018-06-20AE30754ND
2018-06-20AE30750ND
2018-06-20AE30756ND
2018-07-24AE34343ND
2018-08-27AE38540ND
2018-11-06AE45441ND
2019-02-12AE54209ND
2019-02-12AE54211ND
2019-05-22AE67691ND
2019-05-22AE67685ND
2019-05-22AE67687ND
2019-05-22AE67689ND
2019-06-18AE71128ND
2019-07-01AE72854ND