What Triggers an NMS in Ontario?
Not every farm change requires a Nutrient Management Strategy. Here's what specifically triggers the requirement.
Construction Triggers
Building a new livestock barn, expanding an existing barn, or constructing new nutrient storage all trigger NMS requirements.
Livestock Triggers
Increasing the number of livestock on your farm, adding new livestock types, or any change that increases nutrient generation above 5 nutrient units.
Storage Triggers
Constructing, expanding, or modifying manure or nutrient storage facilities.
Not Sure?
If you're planning any changes to your farm operation, it's worth confirming whether you need an NMS. A quick consultation can save you months of delays.
Need Help?
We're here to answer your questions and help you get the plans you need.
NMS Service →
Free Consultation →
Frequently Asked Questions
Do I need an NMS to build a barn in Ontario? In most cases, yes — if you are increasing livestock or nutrient storage capacity, you will likely need a Nutrient Management Strategy (NMS) before construction can begin.
What are nutrient units? A nutrient unit is a measurement used under Ontario's Nutrient Management Act to determine the regulatory requirements for your farm. It's based on the type and number of livestock you have.
When do I need both an NMS and an NMP? Typically when your farm operation exceeds 300 nutrient units, you'll need both a Nutrient Management Strategy (NMS) for storage and expansion, and a Nutrient Management Plan (NMP) for land application of nutrients.
How long does approval take? Approval timelines vary depending on the complexity of your operation. Most plans take several weeks from farm visit to final approval. Starting early is critical — delays can cost you a full growing season.