4,4'-dde
City of Tacoma
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 |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 12 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-09-30 | 15916 | ND |
| 2015-09-30 | 15916 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-01 | 68505 | ND |
| 2015-12-08 | 68751 | ND |
| 2015-12-08 | 68751 | ND |