Know Your Environment. Protect Your Health.

Chloromethane

Palmer Center Ugarc

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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.60 ppb53ND - 3.30 ppb
20191.84 ppb43ND - 2.60 ppb
20201.22 ppb94ND - 4.83 ppb
20212.79 ppb551.02 ppb - 4.50 ppb
20221.71 ppb42ND - 3.45 ppb
20232.74 ppb442.23 ppb - 3.46 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
2018-01-10UG180098POC1.78 ppb
2018-05-09PC180872ND
2018-08-0108011820POCND
2018-08-13EHS1800035918POC3.30 ppb
2018-10-09PC1823882.90 ppb
2019-01-07PC1900592.47 ppb
2019-04-24WD190998ND
2019-07-17071719032.60 ppb
2019-10-14101519072.30 ppb
2020-01-0601072016-POC1.90 ppb
2020-04-22042220182.42 ppb
2020-05-12051220051.86 ppb
2020-06-01060120044.83 ppb
2020-07-0107012020ND
2020-07-2007202003ND
2020-08-1108112028-2-DSND
2020-08-1108112028-1-RAWND
2020-10-0110012002-2ND
2021-01-0501052119-P4.50 ppb
2021-01-25EHS2100013303P3.60 ppb
2021-04-0504052105N1.85 ppb
2021-07-01070121032.98 ppb
2021-10-04100421131.02 ppb
2022-01-04010422113.45 ppb
2022-04-05040522123.40 ppb
2022-07-0507052229ND
2022-10-0410042216-2ND
2023-01-0301032324-12.62 ppb
2023-04-03040323052.63 ppb
2023-07-05PC2322452.23 ppb
2023-10-1855302953.46 ppb