FAA Part 137 Drone Regulations for Agricultural Spraying: What Operators and Farmers Need to Know

The Regulatory Framework for Agricultural Drones

Agricultural drone spraying in the United States operates under a layered regulatory framework involving federal aviation rules, federal environmental regulations, and state-level licensing requirements. Understanding this framework is essential for both drone operators building compliant businesses and farmers evaluating whether their service providers meet legal requirements.

The regulatory landscape has evolved significantly as drone technology has moved from experimental to commercial scale. What was once a gray area is now a defined pathway with clear requirements, though navigating that pathway requires attention to multiple regulatory bodies simultaneously.

FAA Part 107 vs. Part 137: Understanding the Difference

Part 107 is the FAA’s standard rule for small unmanned aircraft systems. It covers basic drone operations including aerial photography, surveying, mapping, and inspection. Part 107 requires a Remote Pilot Certificate obtained by passing an aeronautical knowledge test. Most drone mapping and scouting operations fall under Part 107.

Part 137 is the FAA’s rule specifically governing agricultural aircraft operations, covering the dispensing of any substance (pesticides, fertilizers, seeds, or biological agents) from an aircraft for agricultural purposes. Part 137 has existed since the early days of manned crop dusting and now applies equally to drone-based application operations.

The critical distinction: if you are spraying anything from a drone, you need Part 137 authorization in addition to Part 107. Simply holding a Part 107 certificate is not sufficient for spray operations. Operating without Part 137 authorization exposes operators to FAA enforcement action and exposes farmers to potential liability for hiring non-compliant applicators.

Part 137 certification requires demonstrating knowledge of agricultural aircraft operations, safe handling of agricultural chemicals, and operational procedures specific to aerial application. The process involves application to the FAA Flight Standards District Office, documentation of operating procedures, and in some cases, practical demonstration of competency.

State-Level Requirements

Federal certification is only the starting point. Most states impose additional requirements for agricultural drone operations:

Pesticide applicator licensing is required in virtually every state for anyone applying restricted-use pesticides or operating as a commercial pesticide applicator. This typically requires passing state-administered exams covering pesticide safety, application technology, environmental protection, and specific crop or pest categories.

State-specific drone regulations vary significantly. Some states have adopted drone-specific agricultural exemptions that streamline operations within their borders. Others apply traditional aerial applicator regulations to drones without modification, which can create impractical requirements designed for manned aircraft.

Arizona has established a relatively progressive regulatory framework for agricultural drones, with clear pathways for state pesticide applicator certification and coordination between the Arizona Department of Agriculture and FAA requirements.

Idaho requires commercial pesticide applicator licensing through the Idaho State Department of Agriculture, with specific categories covering aerial application. The state has been proactive in adapting regulations to accommodate drone technology.

Iowa operates under the Iowa Department of Agriculture and Land Stewardship for pesticide licensing, with commercial applicator certification required for any for-hire spray operations including drones.

EPA Considerations

The Environmental Protection Agency regulates pesticide use through the Federal Insecticide, Fungicide, and Rodenticide Act. Key considerations for drone applicators include:

Label compliance is federal law. Every pesticide product has a label that specifies permitted application methods, rates, buffer zones, and restrictions. Drone applicators must verify that the products they apply have label language permitting aerial application. Products labeled only for ground application cannot legally be applied from a drone.

Drift management requirements apply to all aerial applications including drones. While drones inherently produce less drift than manned aircraft due to lower flight altitude and more precise application, operators must still follow label-specified buffer zones, wind speed limitations, and drift reduction practices.

Record keeping requirements mandate documentation of every application including date, location, product, rate, weather conditions, and applicator information. Digital flight logs from drone platforms provide this documentation automatically, often exceeding the detail level of manual records from conventional applicators.

What a Fully Compliant Operation Looks Like

A legitimate agricultural drone application service maintains:

1. FAA Part 107 Remote Pilot Certificates for all pilots
2. FAA Part 137 Agricultural Aircraft Operator Certificate for the operation
3. State commercial pesticide applicator licenses for every state of operation
4. Appropriate liability insurance covering both aviation and pesticide application risks
5. Written standard operating procedures covering safety, application quality, and emergency response
6. Complete application records with GPS flight logs, weather data, and product documentation
7. Current equipment calibration records demonstrating accurate flow rate and application rate delivery

Why Compliance Matters for Farmers

Farmers hiring drone application services share responsibility for ensuring that the work is performed legally. Using an unlicensed or non-compliant applicator can expose farm operations to regulatory penalties, insurance claim denials, and liability for any off-target drift damage.

Before engaging any drone spray service, ask to see their Part 137 certificate, state applicator licenses, and proof of insurance. Legitimate operators will provide this documentation readily. It is a basic qualification for doing business.

Looking Ahead

The regulatory environment for agricultural drones continues to evolve. Expected developments include streamlined Part 137 pathways specifically designed for drone operations, expanded beyond-visual-line-of-sight authorizations that increase operational efficiency, and harmonized state-level frameworks that reduce the compliance burden for multi-state operations.

Operators and farmers who build compliant operations today will be well-positioned as the regulatory environment matures and the industry scales. Those cutting corners on compliance are building businesses on foundations that cannot support long-term growth.