Dalapon
Orange County Utilities Department (OCUD) - West
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
16
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 | 0.0834 ppb | 8 | 2 | ND - 0.350 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.275 ppb | 8 | 7 | ND - 1.000 ppb |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 | Result |
|---|---|
| 2014-01-14 | ND |
| 2014-01-15 | ND |
| 2014-01-15 | ND |
| 2014-06-16 | ND |
| 2014-06-17 | 0.350 ppb |
| 2014-06-17 | 0.317 ppb |
| 2014-08-29 | ND |
| 2014-11-17 | ND |
| 2017-03-14 | 0.103 ppb |
| 2017-03-15 | 0.381 ppb |
| 2017-03-15 | 1.000 ppb |
| 2017-03-15 | 0.210 ppb |
| 2017-06-14 | ND |
| 2017-06-15 | 0.126 ppb |
| 2017-06-15 | 0.216 ppb |
| 2017-06-15 | 0.161 ppb |