Alachlor (Lasso)
Western MWD (Arlington)
Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.
8
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 6 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 0 | ND |
| 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) 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
| Date | Lab ID | Result |
|---|---|---|
| 2015-01-06 | 4790-002-0950 | ND |
| 2015-01-06 | 4790-003-1020 | ND |
| 2015-01-06 | 4790-004-1050 | ND |
| 2015-01-07 | 4790-001-1030 | ND |
| 2015-01-07 | 4790-005-1100 | ND |
| 2015-02-18 | 4790-009-1400 | ND |
| 2018-02-26 | 4790-001-1340 | ND |
| 2018-02-26 | 4790-002-1405 | ND |