Report by Egreenews Staff
Air that thins lives. Water that carries toxins. Power grids that falter under heat and age. Across North America, these are not abstractions. They are measurable realities that municipal, state, and federal governments have attempted to address through an expanding architecture of green finance: targeted loans, loan guarantees, green bonds, and direct grants routed through government-owned banks, treasuries, and specialized agencies.
This report examines the past decade of green finance policies and green initiatives focused on air quality, water quality, and green energy generation in 25 cities and territories spanning the United States, Canada, and Mexico. It asks a single organizing question: when government finance agencies intervene, what changes on the ground?
The question matters because the sums involved are no longer marginal. Between 2022 and early 2025, the U.S. Environmental Protection Agency announced nearly $83 billion in environmental program obligations and awarded close to $69 billion. The Canada Infrastructure Bank committed over $1.2 billion to building retrofits alone. Mexico’s development banks became among the earliest in Latin America to issue sovereign green bonds. These are consequential public investments.
The 25 locations span radically different fiscal capacities, environmental challenges, and governance models. Comparing a wealthy coastal city like San Francisco with an inland industrial hub like Monterrey, or a territorial island like Guam with a Canadian prairie capital like Winnipeg, reveals patterns that single-city case studies miss. The data show that green finance flows most readily to jurisdictions that already possess strong credit ratings, dedicated climate staff, and pre-existing project pipelines. Jurisdictions without those assets remain caught between federal ambition and local capacity.
The Architecture of Green Finance — Who Channels the Money
Federal green finance in North America moves through three distinct institutional architectures. Understanding the plumbing matters because the choice of conduit shapes which projects get funded, how quickly, and at what cost.
In the United States, the dominant mechanism is the combination of EPA State Revolving Funds, Department of Energy loan guarantees, and the newer Greenhouse Gas Reduction Fund. The DOE’s Loan Programs Office, reactivated after a near-decade dormancy, closed a $504.4 million loan guarantee in 2022 for a clean hydrogen storage project in Utah — the first such guarantee since 2014. By December 2024, the office had issued a conditional commitment for up to $2.5 billion to finance over 1,650 megawatts of renewable generation and storage in Wisconsin.
In Canada, the Canada Infrastructure Bank, capitalized by the federal government, operates with a mandate to attract private capital alongside public dollars. Its $10-billion Growth Plan, announced in 2020, allocated $2.5 billion for clean power, $2 billion for large-scale building retrofits, and $1.5 billion for zero-emission buses. The CIB had, by mid-2025, reached financial close on 108 investments supporting 89 projects under construction.
Mexico’s architecture relies on development banks — Nacional Financiera and Banobras — that act as intermediaries for international climate funds. NAFIN issued Mexico’s first green bond in 2015 and became accredited by the Green Climate Fund in 2021. Banobras, accredited in 2024, channels GCF resources into water infrastructure, sustainable mobility, and solid waste. The North American Development Bank, a binational institution headquartered in San Antonio, operates across the U.S.-Mexico border region and had provided $3.3 billion in loans and grants financing 288 projects by the end of 2021.
What distinguishes these architectures is not just their scale but their risk tolerance. The CIB and NADBank are explicitly designed to finance projects that commercial lenders avoid. As the NADBank’s sustainable financing framework states, the bank “prioritizes enhancing access and affordability for communities without existing basic water and waste services”. This gap-filling function is central to understanding where green finance reaches — and where it does not.
Air Quality — Finance-Linked Gains and Persistent Gaps
Mexico City offers the most documented case of air quality improvement linked to sustained policy and investment. Between 2018 and 2022, days with good air quality rose from 99 to 120. Epidemiological analysis by SEDEMA, the city’s environment secretariat, found that air quality improvements since the early 1990s have been associated with an average increase of 3.2 years in life expectancy at birth. These gains correlate with Mexico’s ProAire program, which coordinates emissions reductions across the metropolitan zone, supported in part by development bank financing for cleaner transport and energy.
Monterrey tells a more mixed story. The ProAire del Estado de Nuevo León 2016-2025 documented that in 2014, the metropolitan area averaged 115 days with poor air quality by PM10 standards across ten monitoring stations. By 2025, state authorities reported a 40% reduction in PM2.5 particles and a 50% reduction in PM10 compared to 2024, though local legislators have challenged the transparency of how green tax revenues are spent. A November 2025 legislative statement asserted that “the so-called green tax implemented in Nuevo León has proven to be merely revenue-collecting, without being reflected in concrete air quality improvement actions”.
In the United States, the EPA’s Climate Pollution Reduction Grants program selected 25 applications totaling over $4.3 billion for implementation. These grants fund projects projected to reduce greenhouse gas emissions by an estimated 148 million metric tons of CO2 equivalent by 2030 and 971 million by 2050, with co-benefits explicitly including air quality improvements and cleaner water.
San Francisco achieved a 41% reduction in greenhouse gas emissions below 1990 levels by 2019, exceeding its target of 25%. The city’s air quality and heat mapping initiative, released in 2024, found that tree canopy — a buffer against both heat and air pollution — is unevenly distributed due to “historic racial inequities in infrastructure investment”. This finding underscores a pattern: citywide averages can mask significant intra-urban disparities that green finance has not yet rectified.
Water Quality — The Infrastructure Financing Gap
Water infrastructure is capital-intensive, long-lived, and largely invisible until it fails. Green finance for water quality has flowed predominantly through state revolving funds in the U.S. and through development bank lending in Mexico and the border region.
The Illinois EPA’s Water Pollution Control Loan Program executed 34 new loans totaling approximately $484 million during the 2025 fiscal year, while also supporting green infrastructure projects through its Green Infrastructure Grant Opportunities program, with awards capped at $2.5 million per project. Illinois EPA’s base SRF interest rates as of mid-2025 stood at 2.16%, with hardship rates as low as 1.00%.
Oklahoma provides a striking data point often overlooked in national discussions. The Oklahoma Conservation Commission reported in 2016 that voluntary conservation had resulted in 55 streams being removed from the state’s impaired water bodies list, draining over 3.9 million acres — “1.5 million more acres than any other state”. The program, funded by EPA and supported by USDA technical assistance, demonstrates that voluntary, incentive-based models can achieve measurable water quality outcomes.
In Alabama, the Birmingham Water Works Board secured SRF and Bipartisan Infrastructure Law funding to replace lead service lines throughout its drinking water distribution system, a project designed to bring the system into compliance with EPA and state regulations.
Mexico’s water infrastructure challenges are concentrated in the border region, where NADBank has directed significant resources. As of December 2023, 9% of NADBank’s green bond proceeds were allocated to water-related projects, including wastewater treatment and water service improvements. The bank reported financing four sustainable water and wastewater projects that collectively benefit approximately 826,790 people with 2,381 liters per second of wastewater treatment capacity. In Puebla, a new wastewater treatment plant funded with 69.45 million pesos, 85% from state government, will provide treated water for agricultural reuse, benefiting over 32,000 residents.
The City of Phoenix secured $179 million in federal funding from the Bureau of Reclamation for its North Gateway Advanced Water Purification Facility, which — together with another facility — will supply 14,000 acre-feet of potable water, enough for an estimated 40,000 families. Phoenix also received $15.3 million in EPA CPRG implementation funding for projects spanning energy efficiency, renewable energy, and heat resiliency.
Honolulu has been a consistent issuer of green bonds for wastewater infrastructure, selling its first taxable green bonds in 2016, and in September 2025 planning to raise approximately $223 million through a green bond issuance for environmentally focused wastewater projects, backed by AA and AA+ ratings from Fitch and S&P.
“The 2025B Series Bonds, once again designated as ‘Green Bonds,’ underscore ENV’s commitment to sustainable development through innovation that prioritizes environmental stewardship.” — Roger Babcock, Director, Honolulu Department of Environmental Services
Green Energy Generation — Public Banks and the Renewable Transition
Green energy generation has been the primary destination for green finance across all three countries, though the mechanisms differ sharply.
In Canada, the Clean Energy Improvement Program model — a Property Assessed Clean Energy variant — has been adopted by Edmonton and Calgary. Edmonton’s CEIP offers financing of up to $50,000 for residential retrofits and up to $1 million for commercial projects, with a current fixed interest rate of 3.16%. The program, launched with $20 million in initial financing, is projected to support approximately 300 residential and 16 commercial projects. Calgary passed its CEIP bylaw in December 2021, enabling the city to offer financing covering up to 100% of project costs, with repayment collected through property tax bills.
The CIB’s clean power investments include a $50 million partnership with Creative Energy to finance deep decarbonization of buildings through district energy systems. At Thompson Rivers University in Kamloops, the first project under this partnership will reduce heating system emissions by 95%, advancing the campus toward its 2030 zero-carbon goal.
The U.S. Department of Energy’s loan guarantee activity spans both established and emerging technologies. A $584.5 million loan guarantee to Convergent Energy and Power subsidiaries will finance solar PV and battery storage projects across Puerto Rico, described as part of a commitment to “rebuilding and modernizing Puerto Rico’s electric grid”. The Tribal Energy Finance Program has begun issuing conditional commitments for solar-plus-storage and microgrid projects on tribal lands.
Los Angeles provides a benchmark for the scale of investment required. The LA100 study, conducted by the Los Angeles Department of Water and Power in partnership with the National Renewable Energy Laboratory, found that achieving 100% clean energy would require an investment of $57 to $87 billion. The study concluded that “reliable, 100% renewable energy is achievable”.
Puerto Rico’s energy transformation is unfolding under uniquely challenging conditions. Act 17 of 2019 set a target of 100% renewable electricity by 2050, and the Financial Oversight and Management Board has supported large-scale solar contracts. More than 120,000 rooftops now have solar panels. The EPA awarded $156.1 million to Puerto Rico’s Office of Management and Budget through the Solar for All program for solar and storage installations benefiting low-income households.
In the U.S. Virgin Islands, Governor Albert Bryan signed legislation in November 2025 approving major Coastal Zone Management permits for utility-scale solar and battery storage projects on St. Thomas. The governor described the measures as moving “the Virgin Islands toward an energy system that is more reliable and affordable”. The territory also received approximately $32 million in FY2024 Bipartisan Infrastructure Law funding for drinking water and clean water initiatives.
Guam, with a legislated target of 50% renewable electricity by 2035 and 100% by 2045, received $1.6 million in Energy Efficiency and Conservation Block Grant funding in 2024, plus $62.4 million through the Solar for All program. The U.S. Department of the Interior awarded Guam an additional $2.2 million in 2021 for energy projects including a 100-kilowatt solar PV system at Guam Community College and energy retrofits at the University of Guam.
Institutional Capacity vs. On-the-Ground Reality
The distance between a federal grant announcement and a functioning solar array or wastewater treatment plant can be measured in years — and in some cases, it is never closed.
The Illinois EPA’s 2025 annual report on its Water Pollution Control Loan Program identified a structural constraint: “significant ramp up in staff would be required to meet additional funding obligations and that would still not be enough to meet the true requirements for water infrastructure around the state”. This is not a funding shortage. It is a capacity shortage.
Mexico’s Banobras acknowledged a similar gap in its GCF accreditation documentation, noting that it intends to use GCF funds to build subnational implementation capacity, developing projects at the state and municipal level where technical expertise is thinnest.
At the federal level, the U.S. EPA’s Greenhouse Gas Reduction Fund illustrates how political reversals can interrupt capital flows. The $27 billion program, created under the Inflation Reduction Act, saw $20 billion in grant agreements terminated by the EPA in March 2025, triggering litigation. The Coalition for Green Capital had, before the termination, placed nearly $2.7 billion in financial partnership vehicles.
The data on what actually gets built, versus what is announced, is incomplete. A peer-reviewed study published in Management Science found that environmental regulatory uncertainty raises municipal bond yields, increasing the cost of public capital for precisely the kinds of long-lived infrastructure projects green finance seeks to support. The study’s findings — based on U.S. municipal bond market data — suggest that policy volatility itself functions as a tax on green infrastructure investment.
In Canada, research published in the International Journal of Water Resources Development examined sustainable finance and water governance in Ontario municipalities. The study documented that while green bonds and the Canada Infrastructure Bank have expanded financing options, municipal uptake depends heavily on the presence of dedicated sustainability staff and prior experience with complex financial instruments.
The Periphery and the Center: San Juan and Toronto
Comparing San Juan, Puerto Rico, with Toronto, Ontario, reveals the starkest gradient in green finance capacity within this report’s geographic scope.
Toronto has issued $630 million in green bonds, financing subway extensions, cycling networks, social housing energy retrofits, and flood protection. The city’s 2021 capital budget identified 439 projects through a climate lens, with $611.3 million spent on projects with greenhouse gas reduction or climate resilience components. Toronto’s ten-year capital plan for climate-related projects totals $4.8 billion. The city’s credit rating and institutional depth allow it to access capital markets directly.
San Juan operates under the oversight of a federal Financial Oversight and Management Board, created in response to Puerto Rico’s debt crisis. The board has supported the renewable energy transition, but the fiscal constraints are fundamental. Act 10 of 2024, which restricts the Energy Bureau’s ability to modify net metering policies, was passed without public hearings and was described by the Oversight Board’s executive director as an “abrupt departure from its policy of de-politicizing the energy sector”.
“The energy system has only just begun to recover from decades of political mismanagement that left the people of Puerto Rico with a failing electric system.” — Robert F. Mujica Jr., Executive Director, Financial Oversight and Management Board for Puerto Rico
Puerto Rico’s Solar for All allocation of $156.1 million represents a significant federal investment, but it is a grant, not a revolving fund. It does not build lasting institutional financing capacity. Toronto’s green bond program, by contrast, is self-sustaining: proceeds repay, new bonds are issued, and the city’s balance sheet supports ongoing market access.
The gap is not merely one of wealth. It is a gap in institutional architecture. Toronto’s Atmospheric Fund, a city agency created in 1991, provides dedicated financing and expertise for emissions reduction and air quality improvement. San Juan’s Green Energy Trust, created more recently, is working to establish similar capacity but operates under far tighter fiscal constraints.
Evidence Gaps and Next Steps
The past decade of green finance in North America demonstrates that government finance agencies can mobilize significant capital for air quality, water quality, and green energy generation. The North American Development Bank has financed 310 projects benefiting more than 19 million border residents. The Canada Infrastructure Bank has catalyzed over 100 investments. Mexico’s development banks have pioneered green bond issuance in Latin America. The U.S. EPA has obligated tens of billions of dollars across multiple programs.
The limits of this architecture are equally clear. The data show that financing flows most readily to jurisdictions with strong credit ratings, dedicated climate staff, and mature project pipelines. Communities without those assets — smaller municipalities, territories, and historically underserved neighborhoods — rely disproportionately on grants rather than revolving loan funds, making their progress contingent on political cycles.
Several evidence gaps deserve attention from legislators and their staff. Data on the actual air and water quality outcomes attributable to specific green finance instruments remain sparse. Most reporting tracks dollars obligated or projects financed, not ambient environmental improvements linked to those investments. The NADBank’s shift in 2024 from anticipated to actual project impacts — measuring operational and environmental performance — offers a model that other institutions might study.
A second gap concerns the interaction between federal green finance and local zoning, permitting, and procurement rules. A project that is fully financed can still be delayed for years by local regulatory processes. The available data do not systematically capture these bottlenecks.
A third gap is cross-border. While NADBank operates in both the U.S. and Mexico, and the CIB operates across Canadian provinces, there is no trilateral mechanism for comparing green finance effectiveness, sharing underwriting standards, or co-financing projects that affect shared airsheds and watersheds.
3 Questions for Further Research
- What is the measurable lag time between green finance disbursement and statistically detectable improvements in ambient air and water quality in specific metropolitan areas?
- How do local zoning codes, permitting timelines, and procurement regulations affect the velocity of green finance deployment compared across U.S., Canadian, and Mexican municipalities?
- To what extent do Property Assessed Clean Energy programs in Alberta and U.S. jurisdictions actually serve low-income households, and what participation data exist disaggregated by income quintile?
Key Takeaways
- Federal green finance in North America has mobilized over $100 billion across EPA, DOE, CIB, and Mexican development bank programs between 2016 and 2025, but the distribution of these funds is heavily skewed toward jurisdictions with pre-existing institutional capacity.
- Air quality improvements in Mexico City — from 99 to 120 good air days between 2018 and 2022 — correlate with sustained policy and investment, while Monterrey’s green tax revenues have been challenged as insufficiently linked to measurable outcomes.
- Water infrastructure financing through state revolving funds and development bank lending addresses critical needs, but multiple state agencies report that staffing constraints limit their ability to deploy available capital.
- The gap between a green bond-issuing city like Toronto ($630 million issued) and a grant-dependent territory like the U.S. Virgin Islands ($32 million in BIL water funding) reflects fundamental differences in institutional architecture, not just wealth.
Evidence suggests that policymakers may consider requiring standardized reporting of actual environmental outcomes — not just dollars disbursed or projects financed — as a condition of continued federal green finance support, modeled on the NADBank’s transition from anticipated to measured project impacts.
