Alachlor (Lasso)
Roper Water System
NOTE: Roper Water System purchases water from Washington County Water System which is required to test for alachlor (lasso). Sample information shown below was taken by Washington County Water System.
Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 1 | 0 | ND |
| 2017 | ND | 1 | 0 | ND |
| 2018 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 2 ppb
The legal limit for alachlor, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
NOTE: Roper Water System purchases water from Washington County Water System which is required to test for alachlor (lasso). Sample information shown below was taken by Washington County Water System.
| Date | Lab ID | Result |
|---|---|---|
| 2015-05-12 | ND | |
| 2015-08-17 | ND | |
| 2017-07-25 | 8502-072517-021S | ND |
| 2018-06-19 | 8502-061918-021S | ND |
| 2019-04-16 | 8502-041619-021S | ND |