Dalapon
Wahpeton Water Supply
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
10
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 | 1.97 ppb | 3 | 3 | 1.40 ppb - 2.60 ppb |
| 2015 | 1.70 ppb | 2 | 2 | 1.20 ppb - 2.20 ppb |
| 2016 | 1.80 ppb | 1 | 1 | 1.80 ppb |
| 2017 | 2.40 ppb | 1 | 1 | 2.40 ppb |
| 2018 | 1.40 ppb | 1 | 1 | 1.40 ppb |
| 2019 | 1.000 ppb | 2 | 2 | 0.800 ppb - 1.20 ppb |
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 |
|---|---|---|
| 2014-02-10 | 2034458 | 1.90 ppb |
| 2014-05-12 | 2050510 | 1.40 ppb |
| 2014-07-15 | 2071041 | 2.60 ppb |
| 2015-01-20 | OE210622 | 1.20 ppb |
| 2015-09-28 | OE298824 | 2.20 ppb |
| 2016-12-06 | OE458760 | 1.80 ppb |
| 2017-09-19 | OE566889 | 2.40 ppb |
| 2018-09-10 | OE710574 | 1.40 ppb |
| 2019-08-13 | OE848653 | 1.20 ppb |
| 2019-08-13 | OE848655 | 0.800 ppb |