Rodenticide restrictions for commercial pest control are tightening in the states and still pending at the federal level. California now prohibits most uses of all seven anticoagulant rodenticides outside a list of exempt sites. South Carolina limits sales of second-generation anticoagulants to certified applicators. EPA’s 2022 proposals for 11 rodenticides were still proposals when we checked the record on September 22, 2026.
For a commercial PCO, the question on the route is narrower: how do you make each baiting decision, and how do you explain it later? Monitoring data helps with the explaining. It shows where and when activity happened at monitored points, which supports bait decisions and trap-based programs alike.
Quick answer: Rodent monitoring does not replace rodenticides, and it does not decide whether a product is legal at a site. It gives the operator a time-stamped record of activity by location. That record helps set a threshold before baiting, place bait where activity is confirmed, pull bait when activity stops, and show a customer or regulator why each step was taken.
In this article
- What rodenticide restrictions apply to commercial accounts in 2026?
- What does California’s rodenticide ban cover?
- Which other states restrict rodenticides?
- How does monitoring data support targeted baiting decisions?
- What should the record show for each rodenticide decision?
- What can’t monitoring tell you about rodenticide use?
- Frequently asked questions
This article summarizes public regulatory sources for working pest professionals. It is not legal advice. Rules change, so confirm what applies to a specific site with your state lead agency.
What rodenticide restrictions apply to commercial accounts in 2026?
The federal picture has three parts, and only one of them governs what is on the label today. Current labels trace back to EPA’s 2008 risk mitigation decision. The proposed interim decisions EPA issued in November 2022 would add more, and the Rodenticide Strategy EPA finalized in November 2024 covers endangered species in specific areas.
| Federal action | Status as of September 22, 2026 | What it means on a route |
|---|---|---|
| 2008 risk mitigation decision | In effect | Second-generation anticoagulants (SGARs) are out of consumer products. The label’s placement and bait station requirements apply. |
| Proposed interim decisions for 11 rodenticides (November 2022) | Proposed only. No interim decision had issued. | No label change yet. The proposals include restricted-use classification for all SGARs, strychnine, and zinc phosphide, plus carcass search and collection, cleanup of moved bait, and reporting of dead nontarget animals. |
| Rodenticide Strategy, final biological evaluation (November 22, 2024) | Final, but EPA says it “does not itself impose any requirements” | Endangered species measures apply only in mapped areas, through Bulletins Live! Two, label language, or registration terms. Check the bulletin for the county. |
EPA’s safety review page says the next step after the proposals “is issuing an interim decision.” South Carolina’s pesticide regulator reported in November 2025 that EPA planned an amended proposal and a final interim decision in 2026. Neither had appeared in the rodenticide dockets or the Federal Register when we checked. Until one does, the 2022 measures are a preview of where federal rules may go.
What does California’s rodenticide ban cover?
California built its restrictions in three laws. AB 1788 prohibited most uses of the four SGARs effective January 1, 2021. AB 1322 added diphacinone effective January 1, 2024. AB 2552, the Poison-Free Wildlife Act, added chlorophacinone and warfarin effective January 1, 2025, so all seven anticoagulants now fall under the prohibition.
The common summary calls this a residential ban. That undersells it. The Department of Pesticide Regulation’s December 2024 letter to county agricultural commissioners says the prohibition covers “most industrial and institutional uses” as well. For a commercial account list, the letter sorts sites roughly like this:
- Prohibited: restaurants without an attached brewery or winery, grocery stores, offices, schools, shopping malls, airports, ports and terminal buildings, construction sites, and sewers.
- Exempt where the product label allows the use: food storage warehouses, food manufacturing and processing plants, factories, breweries, wineries, medical waste generators such as hospitals and clinics, FDA-registered drug facilities, and agricultural production sites.
- Not exempt: distribution centers. DPR says anticoagulant use “in and around them is prohibited.”
We think that last line is the one most likely to catch a commercial operator out. A food distribution center and a food storage warehouse look identical from the parking lot, and the law treats them differently. AB 2552 also added a civil penalty of up to $25,000 per day for sale or use in violation.
Non-anticoagulants remain an option. UC IPM’s Pest Notes on rats lists bromethalin, cholecalciferol, and zinc phosphide as registered in California for rats and house mice.
More change may come. DPR’s June 29, 2026 update says its reevaluation of both anticoagulant classes aims to finish the scientific evaluation by the fourth quarter of 2026. If rulemaking or other mitigation is required, DPR targets the third quarter of 2028. Your County Agricultural Commissioner is the right place to confirm how a specific site is classified.
Which other states restrict rodenticides?
South Carolina restricted SGARs from February 1, 2025, and in November 2025 its regulator extended the restriction indefinitely. Selling them now takes a dealer license, sales go only to certified applicators, and trained technicians may apply them under a certified applicator’s supervision. Connecticut amended its pesticide statute in 2025 to require that all SGARs be classified for restricted use by January 1, 2026.
Bills have been introduced in several other states. A bill is not a law, and many never pass. Check your state lead agency’s current rules rather than a list of proposals.
How does monitoring data support targeted baiting decisions?
Integrated pest management puts an action threshold and monitoring ahead of control. The same logic applies to a single baiting decision: set the threshold, confirm activity, then choose the control. For the wider program, see how sensor data fits each part of an IPM program.
Nontoxic monitoring blocks in tamper-resistant stations are standard practice. What a manual check can’t tell you is when the feeding happened or whether it happened once or every night. The GTSensor 4.0 can be used with rodenticide bait stations and with monitor bait stations, with or without an active trap mechanism. Its motion sensor detects rodents passing below it in non-lethal stations, so visits are logged between service days.
Then comes placement. UC IPM advises putting bait where there are signs of activity and warns that rats may take several days to weeks to enter a new station. An activity history by station shows which stations rats actually use. The same history gives you a documented end point, and UC IPM says to remove uneaten bait at the end of a management effort.
| Decision | What the monitoring record shows | What the technician still confirms |
|---|---|---|
| Start baiting at a point | Repeated activity at a monitored station over a set period, measured against the account’s threshold | Signs on inspection, the site’s legal status, and that the label allows the placement |
| Choose which stations get bait | Which stations recorded activity and which stayed quiet | Conditions at unmonitored areas and nearby harborage |
| Keep baiting | Whether activity at baited points is continuing, falling, or moving | Bait consumption, station condition, and any bait moved from its placement |
| Pull bait | Activity at the point has stopped for a defined period, with the device reporting normally | No fresh signs on inspection; uneaten bait removed and the date recorded |
| Switch to trapping | Where activity persists at a site where baiting is restricted or not chosen | Trap type and placement, and the exclusion or sanitation work the site needs |
This cuts both ways. On some accounts the record will justify baiting sooner or more widely, because activity turns out heavier than the monthly log suggested. What you want is a decision you can defend, whatever the bait count ends up being.
What should the record show for each rodenticide decision?
Several rules already expect documentation. California’s public health exemption applies only when it is “documented that other rodent control alternatives, including nonchemical alternatives, are inadequate,” and the urgent need is declared by a state or local public health officer. EPA’s 2022 proposals would add carcass search and cleanup of moved bait. Labels set placement limits of their own.
A useful record for a baiting decision holds:
- The station ID, tied to the site map
- Activity events with dates and times
- The threshold the account uses to trigger action
- The technician’s inspection finding at that point
- Product and placement, if bait went in
- The date bait was pulled
- Any devices that were offline during the period
The GTO platform covers the activity side. Alerts carry the sensor location, timestamp, and detection type, and the platform keeps historical logs and supports scheduled activity reports. A missing check-in is a service exception, not proof that a location is quiet, which is why offline devices belong on the list above. A written technician response protocol keeps the human side consistent.
These records can support a customer or regulator review. They do not certify compliance, and they cannot make a prohibited use lawful.
What can’t monitoring tell you about rodenticide use?
Monitoring covers monitored points only. No alert does not prove no rodents, and activity away from sensored stations won’t show up at all.
It does not identify species, and species matters to the baiting plan. UC IPM notes that roof rats may not enter bait stations even on established runways. A sensor also can’t detect nontarget exposure or secondary poisoning, and it can’t tell you whether a site qualifies for an exemption. That is a question for the regulator.
Our FAQ covers what connected monitoring records can and cannot support. If you want to test the idea, pick one account where the baiting question is live and run a 90-day pilot: capture a baseline, then count how many bait decisions the record changes.
Frequently asked questions
Are rodenticides banned in California?
Not all of them. Most uses of all seven anticoagulants are prohibited outside listed exempt sites, and bromethalin, cholecalciferol, and zinc phosphide remain registered. Confirm how a specific site is classified with the County Agricultural Commissioner.
What rat bait is being banned?
In California, the anticoagulants now prohibited for most uses are brodifacoum, bromadiolone, difenacoum, difethialone, diphacinone, chlorophacinone, and warfarin. At the federal level, EPA has proposed restricted-use classification for all SGARs and some other products, but as of September 22, 2026 it had not issued a decision.
What are the different types of rodenticides?
EPA groups them in three classes. First-generation anticoagulants include chlorophacinone, diphacinone, and warfarin, and second-generation anticoagulants include brodifacoum, bromadiolone, difenacoum, and difethialone. Non-anticoagulants include bromethalin, cholecalciferol, and zinc phosphide.
Does rodent monitoring replace rodenticides?
No. Monitoring records activity at selected points and informs when and where to use bait, traps, or other controls. The control decision stays with the technician and the product label.
Can monitoring data show a public health need for rodenticide use in California?
It can document where and when activity occurred. Under California law, the exemption turns on a state or local public health officer declaring an urgent need, with documentation that other alternatives, including nonchemical ones, are inadequate. Activity records may inform that review. They don’t decide it.
If you are working through the baiting question on a commercial account, talk with Rook Pest about planning a pilot. We can help you define the monitoring scope, the baseline, and the reporting the account needs.