1,1,1-Trichloroethane
Harris County Fresh Water Supply District 1a
NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Baytown Area Water Authority.
1,1,1-Trichloroethane is a solvent and a degreasing agent used for manufacturing metal products and as ingredient in cleaners and aerosols. Exposure to 1,1,1-trichloroethane can harm the nervous system, liver and circulatory system.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 200 ppb
The legal limit for 1,1,1-trichloroethane, established in 1987, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.
ppb = parts per billion
All test results
NOTE: Harris County Fresh Water Supply District 1a purchases water from Baytown Area Water Authority which is required to test for 1,1,1-trichloroethane. Sample information shown below was taken by Baytown Area Water Authority.
| Date | Lab ID | Result |
|---|---|---|
| 2018-08-03 | AE35860 | ND |
| 2019-09-06 | AE82509 | ND |
| 2020-07-14 | AF19344 | ND |
| 2021-08-09 | AF65379 | ND |
| 2021-10-20 | AF74188 | ND |
| 2022-01-12 | AF80002 | ND |
| 2022-04-04 | AF91855 | ND |
| 2022-07-05 | AG03267 | ND |
| 2022-07-05 | AG03269 | ND |
| 2023-01-12 | AG24428 | ND |
| 2023-07-11 | AG47888 | ND |