Dalapon
St John Water District 1
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 |
|---|---|---|---|---|
| 2014 | 23.2 ppb | 2 | 2 | 23.2 ppb |
| 2015 | ND | 4 | 0 | ND |
| 2016 | 0.900 ppb | 4 | 2 | ND - 1.80 ppb |
| 2017 | ND | 4 | 0 | ND |
| 2018 | 0.767 ppb | 6 | 2 | ND - 2.30 ppb |
| 2019 | 2.05 ppb | 4 | 2 | ND - 4.10 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 |
|---|---|---|
| 2014-01-22 | AD88499 | 23.2 ppb |
| 2014-01-22 | AD88499 | 23.2 ppb |
| 2015-04-06 | 35182606003 | ND |
| 2015-04-06 | 35182606003 | ND |
| 2015-10-08 | 35211172003 | ND |
| 2015-10-08 | 35211172003 | ND |
| 2016-02-23 | 35231304005 | ND |
| 2016-02-23 | 35231304005 | ND |
| 2016-09-20 | 35266509007 | 1.80 ppb |
| 2016-09-20 | 35266509007 | 1.80 ppb |
| 2017-01-25 | 35291206002 | ND |
| 2017-01-25 | 35291206002 | ND |
| 2017-10-18 | 35343087005 | ND |
| 2017-10-18 | 35343087005 | ND |
| 2018-01-23 | 35370117004 | ND |
| 2018-01-23 | 35370117004 | ND |
| 2018-05-14 | 35392327001 | 2.30 ppb |
| 2018-05-14 | 35392327001 | 2.30 ppb |
| 2018-07-17 | 35405084001 | ND |
| 2018-07-17 | 35405084001 | ND |
| 2019-01-22 | 35444040001 | ND |
| 2019-01-22 | 35444040001 | ND |
| 2019-07-25 | 35485228001 | 4.10 ppb |
| 2019-07-25 | 35485228001 | 4.10 ppb |