Diquat
East Cocalico Township
Diquat is a herbicide used on potato crops and aquatic weeds.
42
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 22 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 20 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 6 ppb
The EWG Health Guideline of 6 ppb for diquat was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cataracts.
EPA Maximum Contaminant
Level (MCL): 20 ppb
The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2020-05-01 | 22369333.00 | ND |
| 2020-05-01 | 22369477.00 | ND |
| 2020-05-01 | 22369448.00 | ND |
| 2020-05-01 | 22369420.00 | ND |
| 2020-05-01 | 22369391.00 | ND |
| 2020-05-01 | 22369362.00 | ND |
| 2020-05-01 | 22369304.00 | ND |
| 2020-05-01 | 22369275.00 | ND |
| 2020-05-01 | 22369246.00 | ND |
| 2020-05-01 | 22369217.00 | ND |
| 2020-05-01 | 22369188.00 | ND |
| 2020-07-31 | 22956384.00 | ND |
| 2020-07-31 | 22956325.00 | ND |
| 2020-07-31 | 22956181.00 | ND |
| 2020-07-31 | 22956297.00 | ND |
| 2020-07-31 | 22956355.00 | ND |
| 2020-07-31 | 22956268.00 | ND |
| 2020-07-31 | 22956152.00 | ND |
| 2020-07-31 | 22956239.00 | ND |
| 2020-07-31 | 22956123.00 | ND |
| 2020-07-31 | 22956209.00 | ND |
| 2020-07-31 | 22956413.00 | ND |
| 2023-05-30 | 29261559.00 | ND |
| 2023-05-30 | 29261564.00 | ND |
| 2023-05-30 | 29261565.00 | ND |
| 2023-05-30 | 29261563.00 | ND |
| 2023-05-30 | 29261558.00 | ND |
| 2023-05-30 | 29261562.00 | ND |
| 2023-05-30 | 29261567.00 | ND |
| 2023-05-30 | 29261566.00 | ND |
| 2023-05-30 | 29261561.00 | ND |
| 2023-05-30 | 29261560.00 | ND |
| 2023-09-13 | 29847316.00 | ND |
| 2023-09-13 | 29847321.00 | ND |
| 2023-09-13 | 29847317.00 | ND |
| 2023-09-13 | 29847315.00 | ND |
| 2023-09-13 | 29847320.00 | ND |
| 2023-09-13 | 29847318.00 | ND |
| 2023-09-13 | 29847314.00 | ND |
| 2023-09-13 | 29847319.00 | ND |
| 2023-09-13 | 29847322.00 | ND |
| 2023-09-13 | 29847313.00 | ND |