DCPA mono- and di-acid degradates
City of Sonoma
DCPA degradates are residues 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.
12
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 | 0.0240 ppb | 5 | 1 | ND - 0.120 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-03-17 | 9590-001-1050 | 0.120 ppb |
| 2014-03-17 | 9590-003-0920 | ND |
| 2014-03-17 | 9590-004-0950 | ND |
| 2014-03-17 | 9590-006-0830 | ND |
| 2014-09-03 | 9590-023-0910 | ND |
| 2016-03-29 | 9590-002-0735 | ND |
| 2017-04-04 | 9590-001-0900 | ND |
| 2017-04-04 | 9590-003-1000 | ND |
| 2017-04-04 | 9590-004-1125 | ND |
| 2017-04-04 | 9590-006-1040 | ND |
| 2018-10-23 | 9590-023-0945 | ND |
| 2019-09-04 | 9590-002-1208 | ND |