Power plants in Rhode Island emit a combined 4.4M metric tons of CO₂ per year. The table below ranks the top emitters — predominantly coal and natural gas plants. Emission rates vary widely even within the same fuel type: efficient combined-cycle gas plants produce roughly 900 lb CO₂/MWh, while older coal plants can exceed 2,200 lb/MWh.
Emissions data comes from the EPA eGRID program. Zero-emission sources (nuclear, solar, wind, hydro) are excluded from this ranking. For methodology details, see the methodology page.
| # | Plant | State | Fuel | CO₂ (tons/yr) |
|---|---|---|---|---|
| 1 | Rhode Island State Energy Center | Rhode Island | Natural Gas | 1.5M |
| 2 | Manchester Street | Rhode Island | Natural Gas | 895.9k |
| 3 | Tiverton Power Plant | Rhode Island | Natural Gas | 694.4k |
| 4 | Ocean State Power | Rhode Island | Natural Gas | 642.2k |
| 5 | Ocean State Power Ii | Rhode Island | Natural Gas | 539.1k |
| 6 | Toray Plastic America's Chp Plant | Rhode Island | Natural Gas | 89.0k |
| 7 | Rhode Island Hospital | Rhode Island | Natural Gas | 5.7k |
| 8 | Central Power Plant | Rhode Island | Natural Gas | 4.5k |
| 9 | Block Island | Rhode Island | Oil | 51 |
PowerPlantsNearMe.com. (2026). Most Polluting Power Plants in Rhode Island. Derived from EIA Form 860, EIA Form 923, and EPA eGRID. Retrieved from https://powerplantsnearme.com/most-polluting-power-plants/rhode-island
Click the citation to select it for copying. For bulk data, see the data downloads page.