Alachlor (Lasso)
City of Chico
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 3 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 5 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2020-03-02 | Q2007727003 | ND |
| 2020-08-19 | Q2033209005 | ND |
| 2020-08-19 | Q2033209006 | ND |
| 2023-05-30 | Q2319948015 | ND |
| 2023-05-30 | Q2319948016 | ND |
| 2023-05-30 | Q2319948017 | ND |
| 2023-09-12 | Q2339076001 | ND |
| 2023-12-01 | AG65103 | ND |