1.5 Minnesota Use Restrictions, Notification & Posting Requirements
Key Takeaways
- Minn. Stat. 18B.07, subd. 2(b) makes it a violation to direct a pesticide onto property beyond the boundaries of the target site or to apply a pesticide resulting in damage to adjacent property.
- A person may not apply a pesticide in a manner that exposes a worker in an immediately adjacent, open field, and may not treat a site where the application was not requested, ordered, contracted for, or permitted.
- Direct application of a pesticide to a human by overspray or target-site spray is prohibited except for products intended for use on humans, mosquito control operations, certain biological-agent treatments, and applications addressing a public health risk.
- Sites treated with pesticides through an irrigation system must be posted throughout the entire period of pesticide treatment (Minn. Stat. 18B.07, subd. 3).
- Turf warning signs under Minn. Stat. 18B.09 apply only in cities that enact a conforming ordinance; where required, signs extend at least 18 inches above the grass line, stay up to 48 hours, and carry the applicator's business name plus the keep-children-and-pets-off notice.
1.5 Minnesota Use Restrictions, Notification & Posting Requirements
Federal law tells you to follow the label. Minnesota adds a separate layer of use restrictions that apply even when the label is silent, and a set of notification and posting duties that vary by application method and by city. Minnesota Statutes 18B.07 — "Pesticide Use, Application, and Equipment Cleaning" — is the section most often quoted in MDA enforcement cases, and Core exam items are drawn straight from it.
The Baseline Duty
Subdivision 1 states the whole framework in one sentence: pesticides must be applied in accordance with the product label or labeling and in a manner that will not cause unreasonable adverse effects on the environment within the limits prescribed by Chapter 18B and FIFRA. Note the "and." Label compliance alone is not a complete defense in Minnesota.
Prohibited Uses (Subdivision 2)
A person may not use, store, handle, distribute, or dispose of a pesticide, rinsate, pesticide container, or application equipment in a manner that:
- is inconsistent with a label or labeling as defined by FIFRA;
- endangers humans or damages agricultural products, food, livestock, fish, or wildlife; or
- will cause unreasonable adverse effects on the environment.
Four additional prohibitions in subdivision 2 are the ones that generate complaints:
| Prohibition | What It Means in the Field |
|---|---|
| No off-target direction (subd. 2(b)) | You may not direct a pesticide onto property beyond the boundaries of the target site, and you may not apply a pesticide resulting in damage to adjacent property. Damage to adjacent property that is part of the state outdoor recreation system triggers enhanced monetary penalties under Minn. Stat. 18D.40. |
| No direct application to a person (subd. 2(c)) | You may not directly apply a pesticide on a human by overspray or target-site spray. The narrow exceptions are: the product is intended for use on humans; the application is a mosquito control operation; it is control of gypsy moth, forest tent caterpillar, or another pest designated by the commissioner using a biological agent; or the commissioner of health has determined a public health risk warrants it. |
| No exposure of adjacent workers (subd. 2(g)) | You may not apply a pesticide in a manner that exposes a worker in an immediately adjacent, open field. This is a Minnesota rule that sits alongside, not inside, the federal Worker Protection Standard. |
| No uninvited applications (subd. 2(h)) | Even if you follow the label perfectly, it violates Chapter 18B to apply a pesticide directly to a site where the application was not requested, ordered, contracted for, or permitted (outside the mosquito, biological-agent, and public-health exceptions). |
Notification for Mosquito and Public Health Applications
When a pesticide is applied directly on people under the mosquito-control exception, three conditions apply: no practicable and effective alternative exists, the pesticide is among the least toxic available for the target pest, and notification is provided at least 24 hours before application through direct notification, daily posting on the treating organization's website, and a broadcast email to those who requested notice. For control operations tied to human disease, notice may be given less than 24 hours in advance. "Direct notification" can include mailings, public meetings, posted placards, neighborhood newsletters, or other contact designed to reach as many residents as possible.
For biological-agent pest treatments and commissioner-of-health public health applications, notification is by direct notification plus publication in a newspaper of general circulation in the affected area.
Chemigation Posting (Subdivision 3)
Sites being treated with pesticides through irrigation systems must be posted throughout the period of pesticide treatment, in accordance with the labeling and the rules adopted under Chapter 18B. This is one of the very few unconditional posting requirements in Minnesota pesticide law — it does not depend on a city ordinance and it is not limited to turf.
Chemigation also pulls in subdivision 5: a person may not fill application equipment directly from a public water supply or from public waters unless the equipment or the water supply has a backflow prevention device that complies with the Minnesota Plumbing Code (Minnesota Rules Chapter 4714), and cross connections are prohibited. The exception is permitted aquatic pesticide applications to public waters.
Storage Safeguards and Equipment Cleaning (Subdivisions 4 and 7)
- No pesticide, rinsate, or unrinsed container may be stored or left on any site without safeguards adequate to prevent an incident, and none may be stored in an area with access to an open drain unless a safeguard is provided.
- A person may not clean application equipment in surface waters of the state.
- A person may not fill or clean application equipment adjacent to surface waters, ditches, or wells where, because of slope or other conditions, pesticide or contaminated material could reach surface water, groundwater, or a well.
Turf Warning Signs and City Ordinances (Minn. Stat. 18B.09)
This section is frequently misquoted as a statewide posting mandate. It is not. Subdivision 1 limits the section to statutory and home rule charter cities that enact ordinances as provided in the section, and a city ordinance may not be more restrictive than the statute authorizes.
Where a city has enacted the ordinance, all commercial or noncommercial applicators who apply pesticides to turf areas must post or affix warning signs, and the signs must meet exact specifications:
| Requirement | Specification |
|---|---|
| Height | Extend at least 18 inches above the top of the grass line |
| Duration | Remain in place up to 48 hours from the time of initial application |
| Durability | Made of rain-resistant material for at least 48 hours |
| Content | (1) The applicator's business name or entity, and (2) the statement "This area chemically treated. Keep children and pets off until ...(date of safe entry)..." or a commissioner-approved equivalent symbol |
| Placement — residential | Between two feet and five feet from the sidewalk or street |
| Placement — parks, golf courses, athletic fields, playgrounds | Immediately adjacent to the treated areas and at or near the entrances |
Subdivision 4, added in 2023, lets a city of the first class prohibit the use of a pollinator-lethal pesticide — defined as a pesticide bearing a pollinator protection box on the label, or a pollinator precautionary statement in the environmental hazards section. The MDA maintains that product list, and exceptions include pet care and personal care products, indoor pest control, Metropolitan Mosquito Control District applications, wood preservatives, noxious weed control, and agricultural pesticides on agriculturally zoned land.
The working takeaway: before a turf or landscape job in a Minnesota city, confirm the local ordinance. The state statute sets the ceiling on what a city may require, but the city decides whether the requirement applies at all.
Under Minnesota Statutes 18B.07, subd. 2, which action is a violation of state pesticide law even if the applicator followed every direction on the product label?
Which Minnesota posting requirement applies statewide without depending on a local ordinance?
A city has enacted a turf posting ordinance under Minnesota Statutes 18B.09. What must a warning sign on a treated residential lawn include and how must it be placed?
Under Minnesota Statutes 18B.07, subd. 2(c), when may a pesticide lawfully be applied directly on a human by overspray or target-site spray?