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.
21
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 |
|---|---|---|---|---|
| 2018 | 27.9 ppb | 4 | 4 | 14.2 ppb - 44.3 ppb |
| 2019 | 22.6 ppb | 5 | 5 | 5.55 ppb - 38.2 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 23.8 ppb | 4 | 4 | 8.94 ppb - 45.7 ppb |
| 2022 | 22.5 ppb | 4 | 4 | 7.71 ppb - 32.8 ppb |
| 2023 | 17.2 ppb | 4 | 4 | 4.66 ppb - 26.8 ppb |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-09 | 44.3 ppb | |
| 2018-05-09 | 25.5 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 | |
| 2021-03-04 | 4089331 | 8.94 ppb |
| 2021-07-09 | 4144644 | 45.7 ppb |
| 2021-07-09 | 4144641 | 18.4 ppb |
| 2021-07-09 | 4144645 | 22.1 ppb |
| 2022-08-16 | 4338184 | 32.8 ppb |
| 2022-08-16 | 4338186 | 32.0 ppb |
| 2022-08-24 | 4344917 | 7.71 ppb |
| 2022-08-24 | 4344920 | 17.3 ppb |
| 2023-03-09 | 4424687 | 26.8 ppb |
| 2023-03-09 | 4424685 | 11.6 ppb |
| 2023-03-09 | 4424686 | 4.66 ppb |
| 2023-03-09 | 4509785 | 25.9 ppb |