Dalapon
Clearwater Water System
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
31
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 | 0.598 ppb | 6 | 4 | ND - 1.20 ppb |
| 2015 | 0.260 ppb | 6 | 3 | ND - 0.630 ppb |
| 2016 | 0.0686 ppb | 7 | 1 | ND - 0.480 ppb |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 | Result |
|---|---|
| 2014-02-13 | ND |
| 2014-04-08 | 1.20 ppb |
| 2014-08-14 | 1.000 ppb |
| 2014-08-14 | ND |
| 2014-10-13 | 0.710 ppb |
| 2014-10-13 | 0.680 ppb |
| 2015-01-13 | ND |
| 2015-01-13 | ND |
| 2015-04-15 | 0.630 ppb |
| 2015-05-07 | 0.380 ppb |
| 2015-07-29 | ND |
| 2015-10-22 | 0.550 ppb |
| 2016-01-25 | ND |
| 2016-01-25 | ND |
| 2016-01-25 | ND |
| 2016-04-18 | ND |
| 2016-04-27 | ND |
| 2016-07-12 | 0.480 ppb |
| 2016-07-20 | ND |
| 2017-05-11 | ND |
| 2017-05-16 | ND |
| 2017-05-16 | ND |
| 2017-10-02 | ND |
| 2017-10-02 | ND |
| 2017-10-02 | ND |
| 2018-02-26 | ND |
| 2018-02-26 | ND |
| 2018-02-26 | ND |
| 2019-02-05 | ND |
| 2019-02-05 | ND |
| 2019-02-05 | ND |