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
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 0.450 ppb | 10 | 6 | ND - 1.20 ppb |
| 2019 | 0.932 ppb | 5 | 4 | ND - 1.60 ppb |
| 2020 | 1.24 ppb | 4 | 4 | 0.440 ppb - 3.00 ppb |
| 2021 | 0.818 ppb | 5 | 4 | ND - 1.50 ppb |
| 2022 | 0.638 ppb | 4 | 3 | ND - 1.000 ppb |
| 2023 | 0.685 ppb | 4 | 3 | ND - 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 |
|---|---|---|
| 2018-02-22 | POCS 2018 WEE WOOD | 0.700 ppb |
| 2018-02-27 | Q1 18 RAW POCS WEE W | ND |
| 2018-02-27 | Q1 18 TRT POCS WEE W | 0.260 ppb |
| 2018-03-29 | POCS 18 WEE WOOD RES | 0.900 ppb |
| 2018-05-10 | Q2 18 RAW POCS WEE W | ND |
| 2018-05-10 | Q2 18 TRT POCS WEE W | 1.20 ppb |
| 2018-09-25 | Q3 18 TRT POCS WEE W | 0.340 ppb |
| 2018-09-25 | Q3 18 RAW POCS WEE W | ND |
| 2018-11-27 | Q4 18 RAW POCS WEE W | ND |
| 2018-11-27 | Q4 18 TRT POCS WEE W | 1.10 ppb |
| 2019-02-19 | Q1 19 RAW POCS WEE W | ND |
| 2019-02-19 | Q1 19 TRT POCS WEE W | 1.50 ppb |
| 2019-05-28 | Q2 19 TRT POCS WEE W | 1.20 ppb |
| 2019-07-24 | Q3 19 POCS WEE WOOD | 1.60 ppb |
| 2019-10-03 | Q4 19 POCS WEE WOOD | 0.360 ppb |
| 2020-02-19 | Q1 20 POCS WEE WOOD | 3.00 ppb |
| 2020-04-14 | Q2 20 POCS WEE WOOD | 0.440 ppb |
| 2020-08-04 | Q3 20 POCS WEE WOOD | 0.780 ppb |
| 2020-12-08 | Q4 20 POCS WEE WOOD | 0.740 ppb |
| 2021-02-09 | Q1 21 POCS WEE WOOD | 1.40 ppb |
| 2021-05-18 | Q2 21 POCS WEE WOOD | 0.510 ppb |
| 2021-08-23 | POCS 21 WEE WOOD | ND |
| 2021-09-07 | Q3 21 POCS WEE WOOD | 0.680 ppb |
| 2021-10-19 | Q4 21 POCS WEE WOOD | 1.50 ppb |
| 2022-03-22 | Q1 22 POCS WEE WOOD | 1.000 ppb |
| 2022-05-17 | Q2 22 POCS WEE WOOD | 1.000 ppb |
| 2022-07-12 | Q3 22 POCS WEEWOOD | ND |
| 2022-11-01 | Q4 22 POCS WEEWOOD | 0.550 ppb |
| 2023-02-14 | Q1 23 POCS WEEWOOD | 1.50 ppb |
| 2023-04-04 | Q2 23 POCS WEEWOOD | 0.730 ppb |
| 2023-07-11 | Q3 23 POCS WEEWOOD | ND |
| 2023-10-10 | Q4 23 POCS WEEWOOD | 0.510 ppb |