Soil pollution
Manure from ILOs is spread on surrounding land, often times at capacities in excess of that which the land can absorb. Overloading soil with manure can lead to nutrient build-up in the soil, and leads to run off and water contamination of surrounding waterways. Some provincial governments require large livestock operations to file an annual nutrient management plan, however, these are not fail safe systems and nutrient over loading continues to be a major environmental risk in Canada.
Alberta Manure (Water) Pollution Hoists Red Flag (phosphorus pollution)