DCPA di-acid degradate
Key Ridge Water System
DCPA di-acid degradate is a residue of the herbicide dacthal, or DCPA, which is used for urban, household and agricultural applications. Dacthal is a possible human carcinogen whose use was limited by the EPA in 2005 due to concerns about water contamination.
7
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 |
|---|---|---|---|---|
| 2014 | 34.5 ppb | 2 | 2 | 31.8 ppb - 37.2 ppb |
| 2015 | 31.0 ppb | 2 | 2 | 29.2 ppb - 32.7 ppb |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 12.0 ppb | 1 | 1 | 12.0 ppb |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-09-04 | 83561 | 37.2 ppb |
| 2014-10-02 | 83696 | 31.8 ppb |
| 2015-03-26 | 84073 | 32.7 ppb |
| 2015-06-18 | 84277 | 29.2 ppb |
| 2016-09-29 | ND | |
| 2017-09-20 | ND | |
| 2019-12-10 | 12.0 ppb |