Chloromethane
City of Hallettsville
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.
20
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 3 | 0 | ND |
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 |
|---|---|---|
| 2018-09-19 | AE40773 | ND |
| 2018-09-19 | AE40775 | ND |
| 2018-09-19 | AE40759 | ND |
| 2019-08-22 | AE80240 | ND |
| 2019-08-22 | AE80242 | ND |
| 2019-08-22 | AE80246 | ND |
| 2020-05-19 | AF11753 | ND |
| 2020-05-19 | AF11755 | ND |
| 2020-05-19 | AF11757 | ND |
| 2021-06-10 | AF57493 | ND |
| 2021-06-10 | AF57525 | ND |
| 2021-06-10 | AF57491 | ND |
| 2021-07-27 | AF63450 | ND |
| 2021-11-03 | AF75593 | ND |
| 2022-08-04 | AG07869 | ND |
| 2022-08-04 | AG07873 | ND |
| 2022-08-04 | AG07875 | ND |
| 2023-03-06 | Q2309810001 | ND |
| 2023-03-06 | Q2309810003 | ND |
| 2023-03-06 | Q2309810005 | ND |