The inaugural meeting to launch a regional climate collaborative for the 36 communities of the Sudbury, Assabet, and Concord River watersheds was held in Concord on March 25 with roughly 50 participants. The Massachusetts Municipal Vulnerability Preparedness (MVP) 2025 program awarded the Town of Concord $450,000 to empower communities to proactively address climate risks and enhance their infrastructure and natural resources against extreme weather events.
Climate change and water flow, or lack thereof, does not recognize municipal boundaries, and the SuAsCo Climate Collaborative proposes to establish a formal framework to align local governments, nonprofits and state agencies around shared climate risks, including flooding and drought, while improving access to data, funding and technical resources.
Massachusetts has two to three dozen watershed-specific nonprofits, but they operate largely independently by basin, with no formal statewide coordination structure. The Concord-led proposal for a SuAsCo Collaborative is part of a growing effort to build a regional layer across existing organizations. Current regional climate collaboratives exist for the Charles, Mystic, Neponset, PIE [Parker, Ipswich and Essex] Rivers and Blackstone watersheds.
The watershed serves as a critical resource for regional drinking water, wildlife habitat, recreation, economic interests, and community development. There are approximately 732,000 residents living in the watershed who are represented by four Regional Planning Agencies.
The initiative outlines three primary goals: forming a structured regional partnership, conducting a vulnerability assessment of critical infrastructure, and developing data-driven priorities to guide future climate investments so individual municipalities do not have to address increasingly complex climate threats on their own.
Flooding and drought are identified as the most significant risks across the watershed. Historic precipitation patterns once brought smaller amounts of rain and snow roughly every three days. Today, more precipitation falls in intense bursts- winter Nor’easters, summer thunderstorms, and hurricanes- followed by longer dry periods. Aging and undersized stormwater systems struggle to manage increased rainfall. Roughly 15% of the land in the SuAsCo rivers watershed is covered by impervious surfaces such as roads, rooftops, and parking lots which contributes to stormwater runoff and water pollution issues.
Many communities rely on local groundwater and surface water rather than the MWRA system, increasing vulnerability during drought conditions. Municipalities draw down surface and groundwater sources, pumping drinking water from wells, rivers, and aquifers that initiates a change in traditional flow patterns — water tables can run dry or begin drawing from sources with contaminated plumes.
On the work horizon
Planned work includes climate modeling, infrastructure risk analysis, and developing shared policy and data collection and management approaches. The project does not include construction but is intended to produce planning tools and partnerships that guide future investments.
Working with nature-based solutions includes restoring wetlands and floodplains to handle increasing storm energy and expanding green infrastructure such as rain gardens and bioswales. Roughly 70% of the 162 dams in the SuAsCo watershed are over a century old and now require extensive upkeep while presenting obstacles to river restoration and fish passage. The watershed preserves essential ecosystems that provide an environment where native plants and animals can thrive.
The plan also emphasizes environmental justice. More than 200 environmental justice census block groups are located within the watershed, with higher concentrations in cities such as Framingham, Marlborough and Natick. The proposal calls for targeted outreach, community meetings and translation services to ensure participation in planning and decision-making.
Project leaders include the members from the Metropolitan Area Planning Council (MAPC), the non-profit Organization for the Assabet, Sudbury and Concord Rivers (OARS), the state Municipal Vulnerability Preparedness program and Concord. The collaborative expects to operate over a two-year period, with OARS serving as lead coordinator with municipalities participating through a 10-person steering committee. The first year would focus heavily on stakeholder engagement and organizing people and data sources, working with municipal leaders, community organizations and residents, before advancing to technical analysis and implementation planning.
Long-term sustainability would depend on continued municipal participation and the development of shared governance and funding structures. The goal of the organizers is to create a model for regional climate coordination that can be replicated in other parts of Massachusetts.
For more information on the watershed see tinyurl.com/SuAsCoWatershed
The Municipal Vulnerability Preparedness (MVP) program is a component of ResilientMass, the statewide climate adaptation plan. Wayland used a 2018 Municipal Vulnerability Preparedness (MVP) planning grant for around $20,000 to complete its MVP Community Resilience Building planning process in April 2019. This work established the town’s baseline climate risk assessment, priority action list and produced a MVP report that was required for eligibility for future funding.
The town received a share of FY2020 MVP Action Grant for ~$140,000 dollars in implementation funding to focus on flood vulnerability and stormwater assessment, culvert and drainage infrastructure evaluation, and identification of priority flood mitigation projects. A second FY2021 MVP Action Grant for ~$50,000 covered continued analysis, prioritization of mitigation projects and integration with capital planning discussions.
Wayland secured a $44,000 grant in 2024 under the Accelerating Climate Resilience For Elders program from the MAPC. The funding was earmarked for Wayland to spearhead a collaborative effort to address the escalating impacts of extreme heat caused by climate change.
Wayland has participated in the SuAsCo regional coordination discussion effort, by pre-grant collaboration and a letter of support from the town manager.
The 34.4 mile Assabet and 33 mile Sudbury River flow north until their confluence at Egg Rock, just west outside of Concord center and converge to form the 16.3 mile Concord River which continues north to Lowell where it merges with the Merrimack River and heads out to the Atlantic Ocean at Newburyport.
The SuAsCO watershed covers 399 square miles, flows through all three units of the Great Meadows National Wildlife Refuge, contains 83.7 miles of rivers, streams, and ponds, and 29 miles of federally designated Wild & Scenic rivers (Sudbury: 16.6mi, Assabet: 4.4mi, Concord: 8mi).
Not to be overlooked, Wayland is a two-watershed town. A small area of the southeastern corner of town flows into Charles River Watershed.