1,1,1-Trichloroethane
Chowan County Water System
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 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-10-22 | 8045-102214-E01V | ND |
| 2015-10-14 | ND | |
| 2016-10-05 | 8045-100516-E01V | ND |
| 2017-10-18 | 8045-101817-E01V | ND |
| 2018-09-19 | 8045-091918-E01V | ND |
| 2018-10-24 | 8045-102418-E01V | ND |
| 2019-01-16 | 8045-011619-E01V | ND |
| 2019-05-01 | 8045-050119-E01V | ND |
| 2019-07-10 | 8045-071019-E01V | ND |
| 2019-10-30 | 8045-103019-E01V | ND |