Dalapon
Assumption Parish Waterworks District 1
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 21.2 ppb | 8 | 6 | ND - 31.6 ppb |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | 0.950 ppb | 4 | 2 | ND - 1.90 ppb |
| 2018 | 1.000 ppb | 4 | 2 | ND - 2.00 ppb |
| 2019 | 1.05 ppb | 4 | 2 | ND - 2.10 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 |
|---|---|---|
| 2014-02-03 | AD88681 | 27.1 ppb |
| 2014-02-03 | AD88681 | 27.1 ppb |
| 2014-04-14 | AD90510 | 31.6 ppb |
| 2014-04-14 | AD90510 | 31.6 ppb |
| 2014-07-21 | AD93831 | 26.1 ppb |
| 2014-07-21 | AD93831 | 26.1 ppb |
| 2014-10-06 | AD98268 | ND |
| 2014-10-06 | AD98268 | ND |
| 2015-03-31 | 35181766003 | ND |
| 2015-03-31 | 35181766003 | ND |
| 2016-03-15 | 35234393001 | ND |
| 2016-03-15 | 35234393001 | ND |
| 2016-09-19 | 35266189008 | ND |
| 2016-09-19 | 35266189008 | ND |
| 2017-01-31 | 35292293003 | ND |
| 2017-01-31 | 35292293003 | ND |
| 2017-10-16 | 35342351003 | 1.90 ppb |
| 2017-10-16 | 35342351003 | 1.90 ppb |
| 2018-01-25 | 35370415008 | ND |
| 2018-01-25 | 35370415008 | ND |
| 2018-07-23 | 35406285001 | 2.00 ppb |
| 2018-07-23 | 35406285001 | 2.00 ppb |
| 2019-01-29 | 35445085001 | ND |
| 2019-01-29 | 35445085001 | ND |
| 2019-07-24 | 35484850001 | 2.10 ppb |
| 2019-07-24 | 35484850001 | 2.10 ppb |