Ameresco Ox Mountain Biomass Power Plant, California, United States

Ameresco Ox Mountain is a biomass power plant located in California, United States, with a capacity of 11.4 MW. The facility is owned by AMERESCO Ox Mountain Energy LLC and operates using waste as its primary fuel source. As a biomass plant, it contributes to renewable energy generation in the region. The plant operates under the regulatory framework of the US Environmental Protection Agency (EPA), including the Clean Air Act (CAA) and associated standards such as the National Ambient Air Quality Standards (NAAQS). Biomass power plants in the US are subject to emission limits for pollutants like SOx, NOx, and particulate matter, and may participate in renewable energy certificate programs. This facility plays a role in the local energy grid by providing a modest but steady supply of electricity from waste-derived fuel. Its operation supports waste management and renewable energy goals, reducing reliance on fossil fuels and contributing to the state's renewable portfolio standards.

The plant's use of waste as fuel reduces landfill methane emissions and provides a renewable energy source. However, biomass combustion emits CO2, SOx, and NOx, though at lower net carbon impact compared to fossil fuels. Located in California, the facility must comply with stringent state air quality regulations, including the California Air Resources Board (CARB) standards. Its modest capacity of 11.4 MW limits its environmental footprint relative to larger power plants.