Know Your Environment. Protect Your Health.

Chloromethane

Wee Wood Park

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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.450 ppb106ND - 1.20 ppb
20190.932 ppb54ND - 1.60 ppb
20201.24 ppb440.440 ppb - 3.00 ppb
20210.818 ppb54ND - 1.50 ppb
20220.638 ppb43ND - 1.000 ppb
20230.685 ppb43ND - 1.50 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
2018-02-22POCS 2018 WEE WOOD0.700 ppb
2018-02-27Q1 18 RAW POCS WEE WND
2018-02-27Q1 18 TRT POCS WEE W0.260 ppb
2018-03-29POCS 18 WEE WOOD RES0.900 ppb
2018-05-10Q2 18 RAW POCS WEE WND
2018-05-10Q2 18 TRT POCS WEE W1.20 ppb
2018-09-25Q3 18 TRT POCS WEE W0.340 ppb
2018-09-25Q3 18 RAW POCS WEE WND
2018-11-27Q4 18 RAW POCS WEE WND
2018-11-27Q4 18 TRT POCS WEE W1.10 ppb
2019-02-19Q1 19 RAW POCS WEE WND
2019-02-19Q1 19 TRT POCS WEE W1.50 ppb
2019-05-28Q2 19 TRT POCS WEE W1.20 ppb
2019-07-24Q3 19 POCS WEE WOOD1.60 ppb
2019-10-03Q4 19 POCS WEE WOOD0.360 ppb
2020-02-19Q1 20 POCS WEE WOOD3.00 ppb
2020-04-14Q2 20 POCS WEE WOOD0.440 ppb
2020-08-04Q3 20 POCS WEE WOOD0.780 ppb
2020-12-08Q4 20 POCS WEE WOOD0.740 ppb
2021-02-09Q1 21 POCS WEE WOOD1.40 ppb
2021-05-18Q2 21 POCS WEE WOOD0.510 ppb
2021-08-23POCS 21 WEE WOODND
2021-09-07Q3 21 POCS WEE WOOD0.680 ppb
2021-10-19Q4 21 POCS WEE WOOD1.50 ppb
2022-03-22Q1 22 POCS WEE WOOD1.000 ppb
2022-05-17Q2 22 POCS WEE WOOD1.000 ppb
2022-07-12Q3 22 POCS WEEWOODND
2022-11-01Q4 22 POCS WEEWOOD0.550 ppb
2023-02-14Q1 23 POCS WEEWOOD1.50 ppb
2023-04-04Q2 23 POCS WEEWOOD0.730 ppb
2023-07-11Q3 23 POCS WEEWOODND
2023-10-10Q4 23 POCS WEEWOOD0.510 ppb