Herbicide applications in Lassen County
84 published applications, 12,668 acres reported treated, 2021–2024.
View these applications on the mapHerbicide totals by yearOversight report card
What the colours mean
A pesticide subject to California restricted-material requirements, supported by a county permit or another official source.
Classified by the U.S. EPA for use by, or under the direct supervision of, a certified applicator.
On DPR’s official Groundwater Protection List, 3 CCR section 6800, effective July 1, 2026. DPR identifies these chemicals as having the potential to pollute groundwater. This current listing is shown alongside historical application records.
View the DPR sourceA sourced finding about soil mobility, aquatic toxicity, runoff or persistence.
A product label’s DANGER or WARNING signal word, protective equipment requirement, buffer or aquatic-use restriction.
Applied from a helicopter or aircraft. This describes the application method.
A groundwater listing is separate from restricted-material status and does not establish contamination or a violation at a particular site. An application with no flags has no recorded flag; that does not establish that it is harmless.
Lassen County Agricultural Commissioner
The current Lassen County Agricultural Commissioner has not been recorded here yet.
Inspection records have not been requested from this county yet.
| Year | Applications | Sites | Acres | Restricted / aerial | Inspected | Coverage | Violations found | Grade |
|---|---|---|---|---|---|---|---|---|
| 2024 | 17 | 17 | 4,222 | 0 | — | — | — | No grade |
| 2023 | 17 | 15 | 3,471 | 0 | — | — | — | No grade |
| 2022 | 21 | 20 | 2,346 | 3 | — | — | — | No grade |
| 2021 | 29 | 29 | 2,628 | 0 | — | — | — | No grade |
Records obtained from Lassen County
| Record type | Status | |
|---|---|---|
| Pesticide use reports | Not yet requested | |
| Notices of intent | Not yet requested | |
| Restricted materials permits | Not yet requested | |
| Inspection records | Not yet requested | |
| Enforcement actions | Not yet requested |
How the grade is worked out
What counts: Applications of California restricted materials, and aerial applications.
What counts as inspected: A priority application counts as inspected when the county recorded a use-monitoring inspection at the same site ID within a day of its dates.
Thresholds: A at 50% or more, B at 30% or more, C at 15% or more, D for anything above zero, F for none.
The grade is this publisher's editorial rating, not a regulatory finding. A county whose inspection records have not been obtained is not graded, because an absence of records is not evidence of an absence of inspections. Every figure comes from the county’s own reports; if the county disputes one, it can say so.