What is the total phosphorus (TP) limit for a site?

The total phosphorus (TP) limit for a site is set at 0.41 lbs/ac/yr, which is crucial for maintaining water quality in Virginia. The limit is established as part of the state's efforts to control nutrient pollution, particularly in watersheds that may experience eutrophication due to excess phosphorus. By adhering to this limit, sites can help minimize the amount of phosphorus that enters water bodies, thus protecting aquatic ecosystems and ensuring compliance with state regulatory requirements. This TP limit is based on scientific research and modeling to determine an effective threshold that balances development and environmental protection, making it a key aspect of stormwater management practices.