Biosolids are nutrient-rich organic materials produced from the treatment of sewage sludge. After wastewater is processed at a wastewater treatment plant, the remaining solids are treated to reduce pathogens and odors, making them safe for use. These treated biosolids can be used as a soil amendment in agriculture and landscaping, helping to improve soil quality and promote plant growth. They contain essential nutrients like nitrogen and phosphorus, which are beneficial for crops and gardens, contributing to sustainable land management practices.