Know Your Environment. Protect Your Health.

Chloromethane

Town of Oakland

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20196.23 ppb225.76 ppb - 6.69 ppb
20206.39 ppb223.42 ppb - 9.36 ppb
20217.59 ppb227.00 ppb - 8.18 ppb
20226.92 ppb226.05 ppb - 7.79 ppb
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
2019-07-16E200001910065.76 ppb
2019-07-16E200001910086.69 ppb
2020-06-02E200037230049.36 ppb
2020-06-23E200039280063.42 ppb
2021-06-08E210036260047.00 ppb
2021-06-08E210036260068.18 ppb
2022-06-09E22010770047.79 ppb
2022-06-09E22010770066.05 ppb