Dalapon
Town of Quintana
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
26
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 | 4 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | 0.925 ppb | 4 | 2 | ND - 2.50 ppb |
| 2021 | 0.625 ppb | 4 | 2 | ND - 1.50 ppb |
| 2022 | 0.240 ppb | 5 | 1 | ND - 1.20 ppb |
| 2023 | 0.700 ppb | 4 | 1 | ND - 2.80 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 | AE12960 | ND |
| 2018-04-25 | AE23888 | ND |
| 2018-07-31 | AE35058 | ND |
| 2018-11-15 | AE46229 | ND |
| 2019-02-06 | AE53471 | ND |
| 2019-04-03 | AE61000 | ND |
| 2019-04-03 | AE61086 | ND |
| 2019-07-09 | AE73669 | ND |
| 2019-10-22 | AE87223 | ND |
| 2020-02-10 | AE97589 | 1.20 ppb |
| 2020-05-11 | AF10356 | ND |
| 2020-07-28 | AF21109 | 2.50 ppb |
| 2020-12-09 | AF37034 | ND |
| 2021-01-21 | AF40345 | 1.000 ppb |
| 2021-04-27 | AF51648 | 1.50 ppb |
| 2021-07-29 | AF64027 | ND |
| 2021-10-18 | AF73755 | ND |
| 2022-01-20 | AF80958 | ND |
| 2022-01-20 | AF81051 | ND |
| 2022-05-10 | AF96468 | ND |
| 2022-08-23 | AG10475 | ND |
| 2022-10-20 | AG17809 | 1.20 ppb |
| 2023-02-02 | AG27151 | ND |
| 2023-04-12 | AG36466 | 2.80 ppb |
| 2023-08-09 | AG52101 | ND |
| 2023-11-17 | AG64179 | ND |