Know Your Environment. Protect Your Health.

Chloromethane

Gafford Chapel 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
20180.295 ppb21ND - 0.590 ppb
20190.465 ppb21ND - 0.930 ppb
2020ND30ND
20210.435 ppb21ND - 0.870 ppb
20220.595 ppb21ND - 1.19 ppb
20231.11 ppb220.700 ppb - 1.51 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
2018-04-12Q1815138011ND
2018-04-12Q18151380140.590 ppb
2019-05-22Q19277890030.930 ppb
2019-05-22Q1927789005ND
2020-02-20Q2006545001ND
2020-03-30Q2012915001ND
2020-05-26Q2020631003ND
2021-10-14Q21288740130.870 ppb
2021-10-14Q2128874015ND
2022-07-27Q2221394001ND
2022-10-26Q22323370031.19 ppb
2023-07-18Q23279980051.51 ppb
2023-07-18Q23279980070.700 ppb