Know Your Environment. Protect Your Health.

Chloromethane

Norphlet 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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.14 ppb440.550 ppb - 1.65 ppb
20191.16 ppb331.05 ppb - 1.28 ppb
20202.84 ppb112.84 ppb
20212.19 ppb112.19 ppb
20220.860 ppb21ND - 1.72 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
2018-02-26180600022010.550 ppb
2018-04-30181230055010.930 ppb
2018-07-10181930065011.65 ppb
2018-10-29183050018011.42 ppb
2019-02-19190520044011.05 ppb
2019-02-19190520043011.16 ppb
2019-07-15191980025011.28 ppb
2020-07-20202040003012.84 ppb
2021-08-10212240071012.19 ppb
2022-01-2422027007101ND
2022-08-16O200995-VOC-11.72 ppb