Know Your Environment. Protect Your Health.

Chloromethane

Northwest Harris County Municipal Utility District 19

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-05-17AE26819ND
2018-05-17AE26823ND
2019-11-07AE88931ND
2019-11-07AE88937ND
2020-10-01AF29290ND
2020-10-01AF29300ND
2021-06-10AF57515ND
2021-06-10AF57537ND
2022-05-17AF97248ND
2022-05-17AF97250ND
2023-07-20AG49615ND
2023-07-20AG49637ND