Know Your Environment. Protect Your Health.

Chloromethane

Lake Delton 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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND30ND
20200.104 ppb71ND - 0.730 ppb
2021ND10ND
2022N/A00N/A
2023ND50ND

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
2019-06-191129378ND
2019-07-221135927ND
2019-12-101164822ND
2020-04-20409868ND
2020-05-28424672ND
2020-05-28424675ND
2020-05-28424681ND
2020-06-02426799ND
2020-06-02426786ND
2020-06-024267890.730 ppb
2021-01-20526112ND
2023-03-201301274ND
2023-03-201301276ND
2023-04-191316618ND
2023-04-201316620ND
2023-04-201316622ND