Biogas is no longer a niche environmental strategy but is increasingly viewed as a dispatchable renewable energy resource with applications across electricity generation, transportation fuel, and industrial heat. Current output is sufficient to power an estimated 5.2 million U.S. homes each year, while also generating digestate used as fertilizer in agricultural markets.
The sector’s commercial proposition continues to center on three aligned outcomes: waste management, energy production, and carbon reduction. Capturing methane that would otherwise be emitted enables projects to achieve carbon intensity scores significantly below conventional fossil fuels, particularly in transportation markets. That positioning has strengthened biogas’ role in state and federal decarbonization strategies.
Landfill gas systems remain the primary source of captured biogas in the U.S. Although fewer in number than agricultural or wastewater installations, landfill projects account for roughly 72% of total national capture volume. In 2025, 20 new landfill facilities came online, bringing the total to 599 nationwide.
Investment in landfill projects reached approximately $912 million, representing about 43% of total sector capital deployed during the year. Production capacity from these sites increased 8% to 559 billion cubic feet annually. Electricity generation continues to be the dominant end use for landfill gas, though a growing share of new developments are configured to upgrade output into renewable natural gas (RNG).
Agricultural systems recorded faster percentage growth. Forty farm-based digesters began operating in 2025, supported by roughly $835 million in investment. Methane capture from agricultural sources rose 11% year over year to 99 billion cubic feet. Many new farm projects are designed primarily for RNG production, reflecting sustained demand in low-carbon transportation fuel markets.
Beyond fuel production, on-farm digesters address manure management challenges and create additional revenue streams through energy sales and nutrient recovery. For livestock operators, that dual function is increasingly central to project economics.
Of the 70 projects commissioned in 2025, 68 were built to upgrade biogas into RNG. The total number of RNG-producing facilities reached 659, with production increasing 24% year over year to 225.6 million MMBtu. That volume equates to enough energy to fuel roughly 8.2 million vehicles.
Federal and state incentive structures, combined with transportation sector decarbonization goals, continue to support RNG deployment. The ability to integrate into existing natural gas infrastructure has also reduced market barriers relative to emerging alternative fuels.
Even as RNG expands, electricity generation remains the sector’s largest application by project count. Approximately three-quarters of all U.S. biogas facilities produce power, and about 55% of total captured biogas is directed to electricity markets. For utilities and corporate energy buyers, biogas-fired generation offers firm, dispatchable renewable capacity that complements intermittent wind and solar resources.
Food waste projects represent a smaller but accelerating segment. Investment in this category more than doubled in 2025 to $325 million, increasing capture volumes by 18% to 28 billion cubic feet annually. Municipal organics diversion policies are contributing to this momentum.
Wastewater treatment plants remain the largest category by number of sites, with 1,232 facilities nationwide. While growth in this segment is comparatively steady, it reflects a long-standing role for anaerobic digestion within municipal infrastructure.
Despite recent expansion, significant untapped potential remains. The U.S. generates more than 120 million dry tons of animal manure annually, along with 12 million dry tons of wastewater biosolids and over 24 million dry tons of inedible food waste sent to landfills. Hundreds of landfills continue to flare methane rather than convert it to energy.
The American Biogas Council estimates that more than 17,000 additional systems could be developed across the country, potentially supplying up to 25 gigawatts of firm renewable electricity. Associated economic impacts could include approximately 900,000 short-term construction roles and 45,000 permanent operational positions.
In 2025, seven states—Texas, California, Illinois, Idaho, Washington, Wisconsin, and Florida—each attracted more than $100 million in biogas investment, linking methane capture infrastructure to regional energy and waste management strategies.
