EPA GHGRP · state profile · WI
Wisconsin - GHG emissions
According to the EPA's Greenhouse Gas Reporting Program (GHGRP), corporate greenhouse-gas emissions reported across Wisconsin, by company and facility.
- among states
- #20
- Total CO₂e - Large emitter
- 43.9M MT
- Facilities
- 161
- Companies
- 80
- Avg / facility - High intensity
- 273K MT
Data updated May 2026
Wisconsin reports 43.9M MT CO₂e from 161 EPA GHGRP facilities and 80 parent companies (#20 of 54 U.S. states by aggregated facility CO₂e), led by WEC Energy Group at 10.0M MT (~23% of the state total).
- #20 of 54 states
- WEC Energy Group 22.7% of state
- 1.7% of U.S. GHGRP total
- Avg 273K MT per facility · May 2026
In-state concentration desk
WEC Energy Group accounts for 22.7% of reported Wisconsin CO₂e (10.0M MT of 43.9M MT). The top three in-state reporters hold 47.4% (WEC Energy Group; WPPI ENERGY; DAIRYLAND POWER COOPERATIVE). Shares use EPA GHGRP facilities sited in WI only, not each parent's company-wide total.
- Wisconsin is 1.7% of the 2.57B MT U.S. GHGRP facility rollup across 54 jurisdictions.
- Leading EPA sector by CO₂e: Power Plants at 81.9% (36.0M MT across 45 facilities) - orthogonal to the facility-count sector mix below.
- Trails Iowa by 387K MT on the same state ranking.
- Leads Mississippi by 1.5M MT on the same state ranking.
Wisconsin vs all states by reported GHGRP CO₂e
Where this state's aggregated facility Scope 1 sits among every state and territory in the EPA GHGRP file (readout in million MT)
44 20th of 54 higher than 34 of 54 states
States and territories, banded by total reported facility CO₂e (MT)
Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA Greenhouse Gas Reporting Program · May 2026
Facility mix · EPA sector count
How 161 Wisconsin facilities split by EPA sector
Exclusive in-state facility counts by EPA industry_sector, orthogonal to the leading-parent CO₂e share lens above. Source: EPA GHGRP facility reports in Wisconsin.
Facility mix · Scope 1 size bands
How 161 Wisconsin facilities split by latest reported Scope 1
Exclusive in-state facility counts by latest reported Scope 1 size band, orthogonal to the EPA sector mix above. Source: EPA GHGRP facility reports in Wisconsin.
Largest corporate emitters in Wisconsin
Wisconsin - top corporate emitters (MT CO₂e)
Company footprint
Which companies combine scale and emissions?
Each point is a leading Wisconsin reporter. The crosshairs mark the median among the companies shown, so the chart distinguishes a larger facility footprint from a higher emissions total.
This is a comparison of the leading 12 reporters displayed above, not a measure of production, population, or total company-wide emissions outside Wisconsin.
Read the chart values
- WEC Energy Group 15 sites · 10.0M MT
- WPPI ENERGY 2 sites · 5.9M MT
- DAIRYLAND POWER COOPERATIVE 4 sites · 5.0M MT
- INTEGRYS ENERGY GROUP 1 sites · 4.6M MT
- MGE ENERGY 3 sites · 3.1M MT
- ALLIANT ENERGY 10 sites · 2.8M MT
- GRAYMONT 9 sites · 1.0M MT
- AHLSTROM-MUNKSJO NORTH AMERICA SPECIALTY SOLUTIONS 4 sites · 586K MT
- KOCH INDUSTRIES 59 sites · 478K MT
- ND PAPER 4 sites · 321K MT
- APPLETON PROPERTY VENTURES 1 sites · 288K MT
- DOMTAR 7 sites · 268K MT
State insight: Wisconsin
Wisconsin (WI) reports 43.9M MT CO₂e from 161 EPA GHGRP facilities operated by 80 companies (#20 of 54 states by aggregated facility CO₂e). Per-facility average is about 273K MT. Power Plants leads the in-state CO₂e mix at 81.9%.
Top in-state reporters: WEC Energy Group, WPPI ENERGY, DAIRYLAND POWER COOPERATIVE (together 47.4% of the WI total). These are Scope 1 facility reports only - not a full state inventory or company-wide footprint. See methodology.
Top companies in Wisconsin
Top facilities in Wisconsin
Nationwide states with similar CO₂e or facility scale
Two EPA GHGRP-derived peer sets for Wisconsin: nearest states by aggregated facility CO₂e and by reporting-facility inventory. These are cross-state neighborhoods, not the in-state company list above.
Similar reported CO₂e
Nearest states by aggregated facility CO₂e (43.9M MT here).
Similar facility inventory
Nearest states by GHGRP reporting facility count (161 here).
State totals aggregate EPA Greenhouse Gas Reporting Program (GHGRP) facility reports sited in Wisconsin (WI). Figures reflect facility self-reporting, not a full state inventory. See our methodology. Retrieved and formatted by PlainCarbon
Related reading: Understanding corporate carbon reporting · All states · Methodology
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Greenhouse Gas Reporting Program (GHGRP). Consult a qualified professional before making decisions based on this data.