Dalapon
Georgetown, City of
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
15
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 | ND | 1 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | 1.73 ppb | 3 | 3 | 1.000 ppb - 3.00 ppb |
| 2022 | 0.900 ppb | 2 | 1 | ND - 1.80 ppb |
| 2023 | 1.93 ppb | 4 | 4 | 1.10 ppb - 3.30 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 200 ppb
The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-07 | AE07315 | ND |
| 2019-01-09 | AE23823 | ND |
| 2019-06-17 | AE32048 | ND |
| 2020-01-15 | AE42955 | ND |
| 2020-01-15 | AE42971 | ND |
| 2020-01-22 | AE43349 | ND |
| 2021-02-03 | AE60545 | 1.000 ppb |
| 2021-08-23 | AE70797 | 3.00 ppb |
| 2021-11-08 | AE74672 | 1.20 ppb |
| 2022-02-01 | AE78290 | ND |
| 2022-04-11 | AE81916 | 1.80 ppb |
| 2023-02-06 | AE96469 | 1.30 ppb |
| 2023-05-17 | AF02125 | 2.00 ppb |
| 2023-09-13 | AF08506 | 3.30 ppb |
| 2023-11-07 | AF11145 | 1.10 ppb |