Dalapon
Natchitoches Water System
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
24
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 65.4 ppb | 4 | 4 | 61.7 ppb - 69.1 ppb |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | 1.10 ppb | 4 | 2 | ND - 2.20 ppb |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-04-14 | AD90602 | 69.1 ppb |
| 2014-04-14 | AD90602 | 69.1 ppb |
| 2014-05-07 | AD91347 | 61.7 ppb |
| 2014-05-07 | AD91347 | 61.7 ppb |
| 2015-03-09 | 35178883003 | ND |
| 2015-03-09 | 35178883003 | ND |
| 2015-10-12 | 35211703003 | ND |
| 2015-10-12 | 35211703003 | ND |
| 2016-04-12 | 35239164010 | ND |
| 2016-04-12 | 35239164010 | ND |
| 2016-11-21 | 35279123004 | ND |
| 2016-11-21 | 35279123004 | ND |
| 2017-04-10 | 35306447004 | ND |
| 2017-04-10 | 35306447004 | ND |
| 2017-10-23 | 35344156001 | 2.20 ppb |
| 2017-10-23 | 35344156001 | 2.20 ppb |
| 2018-01-22 | 35370029001 | ND |
| 2018-01-22 | 35370029001 | ND |
| 2018-07-31 | 35408508001 | ND |
| 2018-07-31 | 35408508001 | ND |
| 2019-02-25 | 35450970001 | ND |
| 2019-02-25 | 35450970001 | ND |
| 2019-08-07 | 35488971001 | ND |
| 2019-08-07 | 35488971001 | ND |