1,1,1-Trichloroethane
Concord Water Department
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.
28
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 | ND | 4 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-10-31 | 137495.02 | ND |
| 2014-10-31 | 137495.03 | ND |
| 2014-10-31 | 137495.04 | ND |
| 2014-10-31 | 137495.01 | ND |
| 2015-08-07 | 146612.01 | ND |
| 2015-10-15 | 149110.01 | ND |
| 2015-10-15 | 149110.02 | ND |
| 2015-10-15 | 149110.03 | ND |
| 2015-10-15 | 149110.04 | ND |
| 2016-08-05 | 159131.01 | ND |
| 2016-10-07 | 161374.02 | ND |
| 2016-10-07 | 161374.03 | ND |
| 2016-10-07 | 161374.04 | ND |
| 2016-10-07 | 161374.05 | ND |
| 2017-11-13 | 175839.02 | ND |
| 2017-11-13 | 175839.05 | ND |
| 2017-11-13 | 175839.04 | ND |
| 2017-11-13 | 175839.03 | ND |
| 2018-07-02 | 183690.01 | ND |
| 2018-10-01 | 187223.01 | ND |
| 2018-10-01 | 187223.02 | ND |
| 2018-10-01 | 187223.03 | ND |
| 2018-10-01 | 187223.04 | ND |
| 2019-07-01 | 197248.01 | ND |
| 2019-10-03 | 201192.02 | ND |
| 2019-10-03 | 201192.03 | ND |
| 2019-10-03 | 201192.04 | ND |
| 2019-10-03 | 201192.05 | ND |