1,1,1-Trichloroethane
City of Daly City
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.
10
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 2 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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
| Date | Lab ID | Result |
|---|---|---|
| 2015-08-04 | 1610-010-1120 | ND |
| 2015-12-09 | 1610-013-0745 | ND |
| 2015-12-09 | 1610-013-1045 | ND |
| 2016-01-20 | 1610-004-1040 | ND |
| 2016-02-03 | 1610-010-1045 | ND |
| 2016-02-03 | 1610-011-0950 | ND |
| 2016-02-03 | 1610-013-0815 | ND |
| 2016-02-03 | 1610-018-1130 | ND |
| 2019-01-09 | 1610-010-0920 | ND |
| 2019-01-09 | 1610-018-0640 | ND |