Chlorpyriphos
City of Chesapeake - Western Branch System
NOTE: City of Chesapeake - Western Branch System purchases water from City of Portsmouth which is required to test for chlorpyriphos. Sample information shown below was taken by City of Portsmouth.
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.
Samples
Samples exceeding legal limit (MCL)
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 | ND | 4 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
All test results
NOTE: City of Chesapeake - Western Branch System purchases water from City of Portsmouth which is required to test for chlorpyriphos. Sample information shown below was taken by City of Portsmouth.
| Date | Lab ID | Result |
|---|---|---|
| 2018-05-03 | 3927581 | ND |
| 2018-08-06 | 4012841 | ND |
| 2018-11-13 | 4120768 | ND |
| 2019-02-19 | 4202776 | ND |