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EWG's Tap Water Database — 2021 UPDATE

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Chloromethane

Aqua Water Supply Corporation

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

 

74

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
2015ND230ND
2016ND80ND
2017ND90ND
2018ND110ND
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
2014-02-05AC41499ND
2014-02-05AC41501ND
2014-08-13AC63409ND
2014-10-21Q1453268003ND
2014-10-21Q1453268001ND
2014-10-21Q1453268011ND
2014-10-21Q1453268009ND
2014-10-21Q1453268005ND
2014-10-21Q1453268007ND
2014-10-22Q1453576003ND
2014-10-22Q1453576007ND
2014-10-22Q1453576005ND
2014-10-22Q1453576009ND
2014-10-22Q1453576011ND
2014-10-22Q1453576001ND
2015-02-09AC79748ND
2015-02-09AC79752ND
2015-02-09AC79742ND
2015-02-09AC79744ND
2015-02-09AC79750ND
2015-02-09AC79746ND
2015-02-10AC79985ND
2015-02-10AC79977ND
2015-02-10AC79983ND
2015-02-10AC79981ND
2015-02-10AC79973ND
2015-04-13Q1513588001ND
2015-04-13Q1513588007ND
2015-04-13Q1513588005ND
2015-04-13Q1513588009ND
2015-04-13Q1513588003ND
2015-04-14Q1513703001ND
2015-04-14Q1513703007ND
2015-04-14Q1513703005ND
2015-04-14Q1513703013ND
2015-04-14Q1513703011ND
2015-04-14Q1513703009ND
2015-04-14Q1513703003ND
2016-01-26AD20122ND
2016-01-26AD20134ND
2016-01-26AD20116ND
2016-01-26AD20120ND
2016-01-26AD20118ND
2016-01-26AD20124ND
2016-01-26AD20130ND
2016-01-26AD20138ND
2017-01-11AD64332ND
2017-01-11AD64334ND
2017-01-11AD64322ND
2017-01-11AD64336ND
2017-01-12AD64778ND
2017-01-12AD64780ND
2017-01-12AD64786ND
2017-01-12AD64782ND
2017-01-12AD64776ND
2018-01-25AE10546ND
2018-01-25AE10604ND
2018-01-25AE10554ND
2018-01-25AE10550ND
2018-01-25AE10542ND
2018-01-25AE10548ND
2018-01-25AE10620ND
2018-01-25AE10544ND
2018-01-25AE10624ND
2018-01-25AE10552ND
2018-01-25AE10610ND
2019-05-15AE66526ND
2019-05-15AE66528ND
2019-05-15AE66520ND
2019-05-15AE66518ND
2019-05-15AE66522ND
2019-05-15AE66524ND
2019-05-15AE66530ND
2019-05-15AE66532ND