HTHerbicide Tracker California

Application map

Parcels associated with published applications. Click an outline for a summary and a link to the full record. Flagged applications are outlined in red.

What the colours mean
California Restricted Material

A pesticide that California law restricts. Using it requires a permit from the county agricultural commissioner. This is a matter of law.

Federal Restricted Use

Classified by the U.S. EPA as restricted use: it may only be applied by, or under the direct supervision of, a certified applicator. Also a matter of law.

Editorial Watchlist

A chemical the organisation publishing this tracker has chosen to highlight. This is an editorial judgement, not a legal restriction. A chemical can be watchlisted without being restricted, and restricted without being watchlisted.

Environmental concern

A sourced finding about the chemical’s behaviour in the environment — groundwater listing, soil mobility, aquatic toxicity, runoff or persistence.

Label hazard

Something the product’s own registered label requires: a DANGER or WARNING signal word, protective equipment, or a buffer or aquatic-use restriction.

Aerial

Applied from a helicopter or aircraft rather than from the ground. Shown because aerial application carries a different drift risk, not because it is a warning.

A red stripe down the left of a row means that application carries at least one red flag. An application with no flags is not thereby established as harmless — it means no flag has been recorded for the products reported on it.

Outlines are the properties associated with each application, not measurements of the area treated. An application is shown only once its parcels have been matched and an administrator has published it.