Dieldrin
Holliston Water Department
Dieldrin is a highly toxic insecticide that was banned in the 1970s due to its persistence in the environment and toxicity to people and wildlife.
17
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 0 | ND |
ppb = parts per billion
All test results
| Date | Result |
|---|---|
| 2016-05-03 | ND |
| 2016-05-03 | ND |
| 2016-05-10 | ND |
| 2016-05-24 | ND |
| 2016-12-05 | ND |
| 2016-12-05 | ND |
| 2016-12-05 | ND |
| 2016-12-05 | ND |
| 2017-01-10 | ND |
| 2019-06-11 | ND |
| 2019-06-11 | ND |
| 2019-06-11 | ND |
| 2019-06-11 | ND |
| 2019-11-12 | ND |
| 2019-11-12 | ND |
| 2019-11-12 | ND |
| 2019-11-12 | ND |