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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

City of Kerrville

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

 

53

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND70ND
2014ND80ND
2015ND60ND
2016ND50ND
2017ND120ND
2018ND80ND
2019ND70ND

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
2013-08-2635106170009AMND
2013-08-2635106170001AMND
2013-08-2635106170005AMND
2013-08-2735106349001AMND
2013-08-2735106349005AMND
2013-08-2735106349009AMND
2013-11-1335115870001AMND
2014-02-1835127285001AMND
2014-02-1835127285009AMND
2014-02-1835127285005AMND
2014-02-1935127269009AMND
2014-02-1935127269001AMND
2014-02-1935127269005AMND
2014-05-2035139241001AMND
2014-07-16AC59841ND
2015-04-15AC88380ND
2015-07-20AD00201ND
2015-07-20AD00203ND
2015-08-14AD04432ND
2015-08-14AD04428ND
2015-08-14AD04430ND
2016-02-01AD21129ND
2016-04-18AD33348ND
2016-07-05AD42974ND
2016-07-05AD42962ND
2016-10-24AD54358ND
2017-04-06AD78768ND
2017-05-08AD83088ND
2017-05-08AD83086ND
2017-05-09AD83357ND
2017-05-09AD83359ND
2017-05-09AD83355ND
2017-07-05AD88337ND
2017-07-05AD88335ND
2017-07-05AD88333ND
2017-07-05AD88339ND
2017-10-09AD99820ND
2017-10-09AD99818ND
2018-01-08AE08108ND
2018-01-08AE08106ND
2018-03-22AE19623ND
2018-07-16AE33381ND
2018-10-01AE42259ND
2018-10-01AE42263ND
2018-10-01AE42265ND
2018-10-01AE42261ND
2019-01-14AE49587ND
2019-01-14AE49579ND
2019-04-08AE61438ND
2019-04-08AE61434ND
2019-07-15AE74443ND
2019-07-15AE74449ND
2019-10-03AE85692ND