Know Your Environment. Protect Your Health.

Chloromethane

North Peninsula

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)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND10ND
2014ND40ND
2015ND30ND
2016N/A00N/A
2017N/A00N/A
20180.433 ppb31ND - 1.30 ppb
2019ND10ND
2020N/A00N/A
20210.600 ppb21ND - 1.20 ppb
2022ND20ND
20230.550 ppb21ND - 1.10 ppb

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
2013-09-09201304728ND
2014-03-25201401150ND
2014-03-25201401152ND
2014-03-25201401148ND
2014-03-25201401154ND
2015-09-29201506099ND
2015-09-29201506100ND
2015-09-29201506098ND
2018-05-151.30 ppb
2018-05-21ND
2018-10-26ND
2019-06-11ND
2021-06-2241428051.20 ppb
2021-08-234169117ND
2022-11-144382867ND
2022-11-154382872ND
2023-08-2845147081.10 ppb
2023-08-284514710ND