Know Your Environment. Protect Your Health.

Chloromethane

City of Chico

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND30ND
2020ND40ND
2021ND30ND
2022ND30ND
2023ND30ND

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
2018-12-13Q1851676003ND
2018-12-13Q1851676006ND
2018-12-13Q1851676001ND
2019-01-08Q1900653001ND
2019-01-08Q1900653006ND
2019-01-08Q1900653010ND
2020-03-02Q2007727001ND
2020-06-01Q2021442001ND
2020-08-19Q2033209003ND
2020-08-19Q2033209001ND
2021-08-11Q2121372007ND
2021-08-11Q2121372009ND
2021-08-11Q2121372011ND
2022-09-08Q2226813001ND
2022-09-08Q2226813003ND
2022-09-08Q2226813005ND
2023-05-30Q2319948009ND
2023-05-30Q2319948011ND
2023-05-30Q2319948013ND