DCPA di-acid degradate
Quincy Water Department City Of
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.
27
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 | 25.5 ppb | 5 | 5 | 3.60 ppb - 40.4 ppb |
| 2015 | 20.2 ppb | 5 | 5 | 2.90 ppb - 35.8 ppb |
| 2016 | 11.6 ppb | 4 | 4 | 2.70 ppb - 15.4 ppb |
| 2017 | 18.5 ppb | 4 | 4 | 15.0 ppb - 26.2 ppb |
| 2018 | 27.9 ppb | 4 | 4 | 14.2 ppb - 44.3 ppb |
| 2019 | 22.6 ppb | 5 | 5 | 5.55 ppb - 38.2 ppb |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-05-29 | 83140 | 21.9 ppb |
| 2014-05-30 | 83138 | 22.8 ppb |
| 2014-05-30 | 83137 | 39.0 ppb |
| 2014-05-30 | 83139 | 40.4 ppb |
| 2014-05-30 | 83136 | 3.60 ppb |
| 2015-05-12 | 84179 | 20.8 ppb |
| 2015-05-12 | 84176 | 21.5 ppb |
| 2015-05-12 | 84178 | 35.8 ppb |
| 2015-05-12 | 84177 | 19.9 ppb |
| 2015-05-12 | 84180 | 2.90 ppb |
| 2016-05-16 | 15.4 ppb | |
| 2016-05-16 | 2.70 ppb | |
| 2016-05-16 | 14.1 ppb | |
| 2016-05-18 | 14.1 ppb | |
| 2017-05-23 | 15.0 ppb | |
| 2017-05-23 | 16.6 ppb | |
| 2017-05-23 | 26.2 ppb | |
| 2017-05-23 | 16.2 ppb | |
| 2018-05-09 | 25.5 ppb | |
| 2018-05-09 | 44.3 ppb | |
| 2018-05-21 | 14.2 ppb | |
| 2018-05-21 | 27.6 ppb | |
| 2019-05-21 | 23.0 ppb | |
| 2019-05-21 | 12.0 ppb | |
| 2019-05-21 | 38.2 ppb | |
| 2019-05-21 | 5.55 ppb | |
| 2019-06-17 | 34.3 ppb |