Biosolids; requiring disclosure of use of biosolids for agricultural products and land application; requiring reporting. Effective date.

SB 620 requires businesses selling agricultural products (like compost, fertilizer, or soil amendments) to clearly label if they contain biosolids from wastewater treatment. It also mandates visible signage on properties where biosolids are applied, disclosure to buyers when selling/leasing such land, and annual public mapping by the Department of Environmental Quality showing application sites, dates, and landowner details. Agritourism businesses must receive 60-day written notice if biosolids are applied within four miles. The law applies to all businesses using biosolids in Oklahoma and takes effect November 1, 2025.