Dinoseb
Bonney Lake Water Department
NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for dinoseb. Sample information shown below was taken by City of Tacoma.
Dinoseb is a herbicide that causes birth defects and reproductive difficulties. It has been banned in the U.S. since 1986.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 7 ppb
The legal limit for dinoseb, established in 1992, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.
ppb = parts per billion
All test results
NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for dinoseb. Sample information shown below was taken by City of Tacoma.
| Date | Lab ID | Result |
|---|---|---|
| 2021-06-21 | 4149605 | ND |
| 2021-06-21 | 4149607 | ND |
| 2021-06-21 | 4149606 | ND |
| 2021-06-30 | 4142829 | ND |
| 2021-06-30 | 4142830 | ND |
| 2021-07-21 | 4157695 | ND |
| 2021-07-21 | 4157684 | ND |
| 2021-07-22 | 4157703 | ND |
| 2022-02-01 | 4258884 | ND |
| 2022-09-15 | 4369966 | ND |
| 2022-11-15 | 4383023 | ND |
| 2023-09-05 | 4543470 | ND |
| 2023-09-06 | 4543472 | ND |