Know Your Environment. Protect Your Health.

Chloromethane

West Sound Utility District #1

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0356 ppb91ND - 0.320 ppb
20150.0356 ppb91ND - 0.320 ppb
2016N/A00N/A
2017N/A00N/A
2018ND30ND
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND90ND

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
2014-09-22201409240418AMND
2014-09-22201409240412AMND
2014-09-22201409240416AMND
2014-09-22201409240534AMND
2014-09-23201409250515AMND
2014-09-23201409250596AM0.320 ppb
2014-09-23201409250638AMND
2014-09-23201409250525AMND
2014-09-24201409260328AMND
2015-03-16201503180707AMND
2015-03-16201503180809AMND
2015-03-16201503180471AMND
2015-03-16201503180807AMND
2015-03-17201503190566AMND
2015-03-17201503190512AM0.320 ppb
2015-03-17201503190483AMND
2015-03-18201503200243AMND
2015-03-18201503200254AMND
2018-02-23ND
2018-07-06ND
2018-10-09ND
2023-05-174468291ND
2023-05-174468292ND
2023-05-174468290ND
2023-05-174468290ND
2023-05-174468282ND
2023-05-194468273ND
2023-05-194468272ND
2023-05-194468272ND
2023-05-194468272ND