Know Your Environment. Protect Your Health.

Chloromethane

Miller Grove Water Supply Corporation

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.255 ppb21ND - 0.510 ppb
20190.330 ppb21ND - 0.660 ppb
2020ND30ND
20210.335 ppb21ND - 0.670 ppb
2022ND20ND
20230.360 ppb21ND - 0.720 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
2018-04-12Q18151390020.510 ppb
2018-04-12Q1815139009ND
2019-05-13Q1923868005ND
2019-05-13Q19238680070.660 ppb
2020-05-26Q2020632001ND
2020-05-26Q2020632009ND
2020-07-21Q2028843003ND
2021-11-03Q2130890001ND
2021-11-03Q21308900030.670 ppb
2022-02-16Q2205791003ND
2022-02-16Q2205791005ND
2023-07-18Q2327997006ND
2023-07-18Q23279970080.720 ppb