Agricultural Stormwater Exemption

The Agricultural Stormwater Exemption provides protection against discharge if manure or effluent (manure water) is applied to crop fields or pastures and rain and snow runoff from the fields/pasture flows into a water of the State.

Large size CAFOs are required to have a Nutrient Management Plan (NMP) to qualify for the Agricultural Stormwater Exemption. The nutrient management planning must follow essential NMP requirements in the federal rule.

Permitted CAFOs with a NMP qualify for the Agricultural Stormwater Exemption through the permit required NMP. Small and Medium AFOs automatically qualify for the Agricultural Stormwater Exemption and do not require a NMP for coverage.