Know Your Environment. Protect Your Health.

Chloromethane

Midland-lonaconing

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

7

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND10ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
201925.2 ppb3319.0 ppb - 28.4 ppb
20207.61 ppb336.96 ppb - 8.78 ppb
20212.51 ppb331.27 ppb - 4.89 ppb
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2014-03-04105920PND
2014-03-05105919PND
2014-06-02107600PND
2014-06-02107599PND
2014-09-09109066PND
2014-09-09109065PND
2014-12-03110719PND
2014-12-03110718PND
2015-05-11111250RND
2019-07-02E2000003700819.0 ppb
2019-07-02E2000003700628.3 ppb
2019-07-02E2000003700428.4 ppb
2020-05-27E200036650068.78 ppb
2020-05-27E200036650047.08 ppb
2020-05-27E200036650016.96 ppb
2021-06-15E210037160044.89 ppb
2021-07-26E220002930041.27 ppb
2021-07-26E220002930011.36 ppb