Sewage Sludge - Per- and Polyfluoroalkyl Substances - Regulation
HB 925 establishes a new regulatory framework for sewage sludge and products containing sewage sludge that are intended for land application in Maryland, with a focus on per- and polyfluoroalkyl substances (PFAS). Beginning October 1, 2028, the bill prohibits applying sewage sludge to agricultural or marginal land if the material contains 50 parts per billion or more of regulated PFAS (PFOA, PFOS, or a mixture of the two). For materials containing 25 to under 50 parts per billion, the bill allows only temporary, more restrictive land application while source tracking and mitigation measures are developed and implemented.
The bill requires sewage sludge generators to monitor PFAS levels using specified sampling and laboratory methods, and to conduct source tracking studies and develop mitigation plans when PFAS levels reach 25 parts per billion or more. Those plans must identify major PFAS sources, include actions to reduce concentrations below 25 parts per billion, and may involve industrial pretreatment, point-of-entry treatment, or system-wide treatment solutions. The Department of the Environment is given authority to review, approve, deny, or modify mitigation plans, provide technical assistance, and establish monitoring protocols and additional requirements for blended or commingled sludge.
HB 925 also expands the role of pretreatment authorities and local jurisdictions by authorizing them to set pretreatment standards, local limits, and rates or fees for industrial users that discharge PFAS at levels requiring mitigation. If a publicly owned treatment works lacks an industrial pretreatment program and its sludge exceeds the 25 parts per billion threshold, the Department must work with the utility to develop discharge permits and local limits for industrial users. The bill also permits limited blending or commingling of sludge from multiple sources for a defined period to reduce PFAS concentrations, subject to monitoring and notification requirements.
The overall sentiment reflected in the bill text is precautionary and regulatory, aimed at reducing PFAS exposure while preserving a path for continued sludge management under controlled conditions. Because there are no committee transcripts or recorded votes provided, there is no direct evidence of debate or opposition in the available materials. The structure of the bill suggests a balance between environmental/public health protection and operational flexibility for wastewater treatment systems and sludge generators.
The main points of potential contention are likely to be the cost and feasibility of compliance, the burden of monitoring and source tracking, and the effect of the land-application restrictions on agricultural users, wastewater utilities, and industrial dischargers. The bill also gives the Department significant discretion over technical standards, mitigation plan approval, and additional monitoring, which could raise concerns among regulated entities about implementation timelines, laboratory capacity, and the practical ability to reduce PFAS to the required levels.
The bill amends Maryland Environment Article provisions governing sewage sludge and adds a new section specifically regulating PFAS in sewage sludge used for land application. It creates enforceable concentration thresholds, monitoring requirements, mitigation obligations, and temporary management rules that directly affect sewage sludge generators, land applicators, publicly owned treatment works, industrial users, and local pretreatment authorities. It also authorizes the Department of the Environment to adopt implementing regulations, establish monitoring protocols, and oversee compliance, while preserving and clarifying local authority to impose stricter pretreatment limits and fees.
The bill appears to have been received as a public-health and environmental protection measure focused on PFAS contamination in sewage sludge, with an emphasis on reducing contamination at the source rather than relying only on disposal restrictions. In the absence of recorded committee testimony or vote details, the available context suggests a generally supportive or at least policy-driven consensus around addressing PFAS risks, paired with recognition that utilities and generators need phased implementation and technical assistance. The bill’s staged effective dates and temporary allowances indicate an effort to moderate operational disruption.
Likely areas of contention include the compliance costs for wastewater treatment plants and sludge generators, the feasibility of monthly or quarterly PFAS testing, and the burden of source tracking and mitigation planning for systems receiving industrial discharges. Agricultural interests and land applicators may be concerned about the restrictions on sludge application and the notice, setback, and rate limits imposed on lower-level PFAS materials. Industrial users may object to expanded pretreatment standards, local limits, and fees, while local jurisdictions and utilities may be concerned about the administrative and technical demands of implementing the new requirements.