Wastewater Treatment System Infrastructure Sustainability Act; enact.

SB 2312, the Wastewater Treatment System Infrastructure Sustainability Act, requires Mississippi's Department of Environmental Quality (MDEQ) to create a statewide letter grading system (A-F) for community wastewater systems serving 15+ connections. The grades will be based on compliance with permits and water quality standards, financial health, infrastructure condition, and customer satisfaction. MDEQ must publish annual scores and grades online by 2028, and each wastewater system must notify customers of their grade within 30 days of publication. This law directly affects all municipal wastewater systems in Mississippi, aiming to improve transparency, public health protection, and infrastructure sustainability.