Dalapon
St Charles Water District 1 East Bank
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 |
|---|---|---|---|---|
| 2014 | 23.2 ppb | 2 | 2 | 23.2 ppb |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | 1.70 ppb | 4 | 2 | ND - 3.40 ppb |
| 2019 | 1.55 ppb | 8 | 4 | ND - 3.20 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 | AD88495 | 23.2 ppb |
| 2014-01-22 | AD88495 | 23.2 ppb |
| 2015-04-06 | 35182606002 | ND |
| 2015-04-06 | 35182606002 | ND |
| 2015-10-08 | 35211172001 | ND |
| 2015-10-08 | 35211172001 | ND |
| 2016-03-01 | 35232149004 | ND |
| 2016-03-01 | 35232149004 | ND |
| 2016-09-20 | 35266509006 | ND |
| 2016-09-20 | 35266509006 | ND |
| 2017-01-25 | 35291206005 | ND |
| 2017-01-25 | 35291206005 | ND |
| 2017-10-18 | 35343087004 | ND |
| 2017-10-18 | 35343087004 | ND |
| 2018-01-23 | 35370117001 | ND |
| 2018-01-23 | 35370117001 | ND |
| 2018-07-17 | 35405500001 | 3.40 ppb |
| 2018-07-17 | 35405500001 | 3.40 ppb |
| 2019-01-22 | 35444038001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444037001 | ND |
| 2019-01-22 | 35444038001 | ND |
| 2019-07-25 | 35485229001 | 3.20 ppb |
| 2019-07-25 | 35485229002 | 3.00 ppb |
| 2019-07-25 | 35485229001 | 3.20 ppb |
| 2019-07-25 | 35485229002 | 3.00 ppb |