A bill for an act relating to the discharge of toxic pollutants associated with coal ash into water sources.

HF 2237 prohibits coal-fired power plants and coal ash landfills in Iowa from discharging toxic pollutants (like mercury, arsenic, and cadmium) from specific wastewater streams into water sources. It directly affects existing coal power facilities operating before July 1, 2026, requiring them to comply by December 31, 2029, and new facilities must comply before starting operations. The bill mandates that facilities stop discharging flue gas desulfurization wastewater, bottom ash transport water, and combustion residual leachate into waterways. The Iowa Department of Natural Resources must create rules to implement these requirements. The law aims to prevent avoidable water pollution linked to coal ash, protecting drinking water and public health.