Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chloromethane

Hartland Waterworks

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

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
2015ND40ND
2016ND50ND
2017ND80ND
2018ND50ND
2019ND50ND

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
2014-01-222961267ND
2014-02-242979690ND
2014-02-262981929ND
2014-05-19106991PND
2014-05-19106987PND
2014-05-20106990PND
2014-05-20106989PND
2014-05-20106988PND
2014-08-123080630ND
2014-10-163124218ND
2014-11-18109720PND
2014-11-18109716PND
2014-11-19109719PND
2014-11-19109718PND
2014-11-20109717PND
2015-01-273177035ND
2015-02-043181045ND
2015-05-043235031ND
2015-10-133339902ND
2016-02-16905565ND
2016-02-18906004ND
2016-05-03919202ND
2016-08-10938579ND
2016-10-12953152ND
2017-02-07972670ND
2017-02-07972673ND
2017-02-13973355ND
2017-02-13973354ND
2017-02-13973351ND
2017-04-18983886ND
2017-08-081009628ND
2017-10-041022697ND
2018-02-081040247ND
2018-02-151041298ND
2018-04-241051768ND
2018-08-061071628ND
2018-11-281094669ND
2019-03-061108213ND
2019-03-061108219ND
2019-04-301118492ND
2019-08-141141177ND
2019-11-181161413ND