Maine's PRO Selection: What to Expect by March 2026
Maine holds a unique distinction in the EPR landscape: it was the first state in the nation to enact a packaging EPR law when Governor Janet Mills signed LD 1541 on July 12, 2021. Yet more than four years later, Maine's program remains in the rulemaking and organizational phase, with the selection of a Stewardship Organization (SO) — Maine's equivalent of a PRO — anticipated by early 2026. Understanding why Maine's timeline has stretched and what the SO selection means for producers is essential for any company preparing for the May 31, 2026 registration and reporting deadline.
Maine's Distinctive Model
Unlike Oregon, Colorado, and the other EPR states that adopted PRO-administered collection and recycling programs, Maine designed a municipal cost-reimbursement model. Under LD 1541, producers do not directly manage packaging collection or recycling infrastructure. Instead, they fund existing municipal recycling programs through fees paid to the Stewardship Organization, which then distributes those funds to municipalities based on the volume and type of packaging they process. This approach preserves municipal control over recycling operations while shifting the financial burden from taxpayers to producers — a politically significant distinction in a state with strong local government traditions.
The 2025 Amendment: Narrowing Scope
A critical development in 2025 was Maine's legislative amendment narrowing the scope of LD 1541 to consumer packaging only, explicitly excluding B2B and industrial packaging. This change materially reduces the universe of obligated producers and covered materials. Companies whose packaging is exclusively business-to-business — shipping containers, industrial wrapping, pallet packaging — may fall outside Maine's program entirely. However, producers should carefully analyze their packaging portfolio against the amended definitions, as consumer-facing packaging that passes through B2B distribution channels may still be covered.
The SO Selection Process
Maine's approach to selecting a Stewardship Organization has been deliberate. Rulemaking began in late 2023 and has continued through 2025. As of early 2026, CAA — the Circular Action Alliance, which serves as the approved PRO in California, Colorado, Oregon, Minnesota, and Maryland — has publicly indicated its intent to respond to Maine's RFP for the SO role. If selected, CAA would extend its position as the dominant PRO/SO across six of the seven EPR states, further consolidating the organizational infrastructure that producers use for multi-state compliance. Venable noted in its October 2025 analysis that Maine expects PRO/SO selection by approximately March 2026, though the exact timeline remains subject to regulatory process.
What Producers Should Do Now
Regardless of which organization is ultimately selected as Maine's SO, the compliance obligations are fixed by statute. Producers must register and submit estimated 2025 packaging data by May 31, 2026. The first EPR fee is expected in September 2026. Venable's guidance emphasizes a three-step compliance process applicable across all EPR states: first, determine whether your products are covered under the specific state's definitions; second, assess whether your company meets the producer definition (brand owner, importer, distributor, or retailer, depending on the tiered approach); and third, register with the appropriate PRO or SO. For Maine specifically, the narrow consumer-packaging scope under the 2025 amendment makes the first step — coverage determination — particularly important.
The Broader Significance
Maine's SO selection has implications beyond the state's borders. If CAA is selected, it will reinforce the trend toward a single national PRO infrastructure, which offers producers the operational efficiency of a single compliance relationship across most EPR states but raises the competition and governance concerns flagged by Mayer Brown regarding antitrust implications of PRO coordination. If a different organization is selected, it could introduce fragmentation that complicates multi-state compliance but may also provide competitive pressure on fees and services. Either outcome shapes the strategic environment for producers, investors, and waste management operators for years to come.
Timeline Summary
Maine's path from first-to-enact to still-implementing illustrates the complexity of building EPR programs from scratch. The state charted its own course with the municipal cost-reimbursement model, spent years on rulemaking, narrowed its scope through legislative amendment, and is now finalizing the organizational structure that will collect and distribute producer fees. For producers, the practical implication is clear: the May 31, 2026 deadline is firm, and preparation should begin now regardless of which SO is ultimately selected.
Sources: Proskauer (Oct 2025); Venable (Oct 2025); H2 Compliance (Dec 2025); CAA website
Constellation Insights, a division of Trash Club Ventures, provides strategic regulatory intelligence for brands, investors, and operators navigating the circular economy.
