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Phosphorus Fertilizer Prohibition

April 30, 2019 03:03 PM

To protect water quality by reducing phosphorus runoff, Winnetka bans the use of phosphorus-containing fertilizers. State law already prohibits the application of phosphorus-containing fertilizers by commercial applicators.  The Village’s ordinance complements the state law, and allows exceptions for the Park District and residents when phosphorus doesn’t naturally occur at high enough levels or is otherwise low; and for newly sodded or seeded lawns.

While phosphorus is an essential nutrient for healthy plant growth, it is already present in efficient levels in our local soils. The application of excess phosphorus degrades water quality by causing excessive growth of algae and other aquatic plants, depleting dissolved oxygen and reducing biodiversity. Phosphorus-free and organic fertilizers are an effective alternative that can be found at most hardware stores. 

If you have any questions, please contact the Public Works Department at 847-716-3568.

Click here to see a green gardening guide by the Solid Waste Agency of Northern Cook County.


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