Know Your Environment. Protect Your Health.

Chloromethane

City of West Richland

NOTE: City of West Richland purchases water from City of Richland which is required to test for chloromethane. Sample information shown below was taken by City of Richland.

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.

 

48

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND40ND
2014ND70ND
2015ND30ND
2016N/A00N/A
2017N/A00N/A
2018ND30ND
2019ND10ND
2020N/A00N/A
2021ND110ND
2022ND40ND
2023ND50ND

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

NOTE: City of West Richland purchases water from City of Richland which is required to test for chloromethane. Sample information shown below was taken by City of Richland.

Date Lab ID Result
2014-06-03WA97-SE1-14-10122-24340ND
2014-06-03WA97-SE1-14-10122-24341ND
2014-06-03WA97-SE1-14-10122-24342ND
2014-06-03WA97-SE1-14-10122-24343ND
2014-09-09WA97-SE2-14-17859-40875ND
2014-09-09WA97-SE2-14-17859-40876ND
2014-12-02WA97-SE3-14-23659-53709ND
2014-12-02WA97-SE3-14-23659-53705ND
2014-12-02WA97-SE3-14-23659-53707ND
2015-01-13WA97-SE3-15-00789-1996ND
2015-02-24WA97-SE4-15-03525-8154ND
2015-03-10WA97-SE4-15-04495-10284ND
2018-07-05ND
2019-04-11ND
2019-05-09ND
2019-07-11ND
2019-08-08ND
2019-09-12ND
2019-09-18ND
2021-01-214070629ND
2021-02-124076883ND
2021-03-114087469ND
2021-05-184118748ND
2021-05-184118749ND
2021-07-084142812ND
2021-08-194169230ND
2021-09-094178932ND
2021-10-134194903ND
2021-11-174208636ND
2021-12-084216629ND
2022-01-124233604ND
2022-02-094241715ND
2022-03-094258463ND
2022-04-144272582ND
2022-05-114279794ND
2022-06-084296744ND
2022-07-134315945ND
2022-08-104330297ND
2022-09-144365601ND
2022-10-134361676ND
2022-10-134361675ND
2022-11-094381443ND
2022-12-144392465ND
2023-01-114399229ND
2023-03-084426940ND
2023-04-124443144ND
2023-05-104452809ND
2023-06-204482853ND