Dalapon
The Woodlands Municipal Utility District 1
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
30
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 |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | 0.825 ppb | 4 | 3 | ND - 1.20 ppb |
| 2017 | 0.238 ppb | 8 | 1 | ND - 1.90 ppb |
| 2018 | ND | 8 | 0 | ND |
| 2019 | ND | 8 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
|---|---|---|
| 2014-06-30 | AC58476 | ND |
| 2015-05-20 | AC92777 | ND |
| 2016-09-29 | AD51971 | 1.000 ppb |
| 2016-11-30 | AD59571 | 1.10 ppb |
| 2016-11-30 | AD59570 | ND |
| 2016-11-30 | AD59569 | 1.20 ppb |
| 2017-01-25 | AD66728 | 1.90 ppb |
| 2017-01-25 | AD66746 | ND |
| 2017-04-19 | AD80121 | ND |
| 2017-04-19 | AD80122 | ND |
| 2017-07-19 | AD89897 | ND |
| 2017-07-19 | AD89896 | ND |
| 2017-11-02 | AE03412 | ND |
| 2017-11-02 | AE03410 | ND |
| 2018-02-08 | AE12970 | ND |
| 2018-02-08 | AE12965 | ND |
| 2018-05-30 | AE28031 | ND |
| 2018-05-30 | AE28030 | ND |
| 2018-09-13 | AE40007 | ND |
| 2018-09-13 | AE40009 | ND |
| 2018-11-20 | AE46646 | ND |
| 2018-11-20 | AE46631 | ND |
| 2019-02-06 | AE53133 | ND |
| 2019-02-06 | AE53138 | ND |
| 2019-05-24 | AE68116 | ND |
| 2019-05-24 | AE68113 | ND |
| 2019-09-16 | AE83594 | ND |
| 2019-09-16 | AE83586 | ND |
| 2019-11-26 | AE90572 | ND |
| 2019-11-26 | AE90570 | ND |