Chlorpyriphos
Issaquah Water System
Chlorpyrifos is an organophosphate pesticide that has been widely used, but in 2021, application on food crops was banned by the EPA. Exposure to chlorpyrifos during pregnancy and early life harms the developing brain, including reduced IQ, delayed development of motor and sensory functions, and social and behavioral dysfunction.
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 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 5 | 0 | ND |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2019-11-04 | 19-42188-81579 | ND |
| 2019-11-04 | 19-42188-81580 | ND |
| 2019-11-04 | 19-42188-81581 | ND |
| 2019-11-04 | 19-42188-81582 | ND |
| 2019-11-04 | 19-42188-81587 | ND |
| 2020-02-04 | 20-04403-8799 | ND |
| 2020-05-05 | 20-14434-27791 | ND |
| 2020-05-05 | 20-14434-27792 | ND |
| 2020-05-05 | 20-14434-27793 | ND |
| 2020-05-05 | 20-14434-27794 | ND |
| 2020-05-05 | 20-14434-27799 | ND |
| 2020-08-03 | 20-26280-49846 | ND |