EPA greenhouse gas reporting and emission rates

The U.S. Environmental Protection Agency (EPA) has a mandatory national greenhouse gas (GHG) reporting program. Because we have regulated natural gas companies, we are required to report GHG emissions. Some of our largest customers also are required to report. The EPA website includes resources to understand the rule and an online tool to see if it applies to your company.

Electric utility energy mix and emission rates

This electric energy mix and emission rate information is provided for retail electric customers of We Energies, a regulated utility of WEC Energy Group (WEC) operating in the state of Wisconsin. The emission rates are supplied for customers to estimate their environmental footprint from electric energy supplied by We Energies, such as Scope 2 (indirect) greenhouse gas emissions.

Emission rates are calculated using total emissions and megawatt-hours from generation by owned and jointly-owned facilities, and from long-term power purchase agreements (PPAs). The emission rates apply to retail electric utility customers of We Energies, except for customers of Energy for Tomorrow®, the We Energies Green-e Certified renewable energy program that is offered to all retail electric customers.

Emissions from electric generation facilities are calculated in accordance with the U.S. Environmental Protection Agency mandatory Greenhouse Gas Reporting Program regulations under 40 CFR Part 98. The energy resource mix represents net generation from We Energies-owned facilities, as well as generation acquired through long-term power purchase agreements.

WEC and We Energies reserve the right to use all or some of the environmental attributes associated with generation from renewable energy sources in future years to comply with renewable energy standards or other regulatory requirements, or to sell to third parties the environmental attributes such as renewable energy credits, offsets, allowances and the avoided emissions of greenhouse gases. All information is provided on a voluntary basis, could be subject to change, and has not received independent third party verification. Neither WEC nor We Energies makes any assurances regarding the use of this information by external parties for marketing or other sustainability claims.

We Energies energy mix and emissions1

  2018 2019 2020
Emission rates: Owned generation + long-term PPAs (lbs/megawatt-hour)
Carbon dioxide (CO2) 1,292 1,087 1,000
Methane (CH4) 0.022 0.020 0.019
Nitrous oxide (N2O) 0.025 0.020 0.018
Carbon dioxide equivalent (CO2e) 1,300 1,093 1,006
Sulfur dioxide (SO2) 0.33 0.09 0.04
Nitrogen oxides (NOx) 0.52 0.32 0.26
Energy resource mix: Owned generation + long-term PPAs
Energy from owned generation + long-term PPAs (megawatt-hours) 32,330,208 30,779,721 29,618,067
Coal 46.4% 36.7% 32.0%
Natural gas 22.1% 30.0% 33.1%
Nuclear - long-term PPA 27.7% 29.2% 30.3%
Renewable energy 3.8% 4.1% 4.6%
Hydroelectric 1.3% 1.4% 1.8%
Biomass/wood waste 0.3% 0.3% 0.2%
Wind 2.2% 2.4% 2.6%
Solar 0.0% 0.0% 0.0%
CO2-equivalent emission rate: Owned generation + net purchases/sales to meet customer load (lbs CO2e/megawatt-hour)
Owned generation + net purchases/sales to meet customer load (megawatt-hours) 28,077,663 25,981,436 24,818,330
Carbon dioxide equivalent (CO2e2) (lbs/megawatt-hour3) 1,294 1,100 1,010

1 Table includes data for all long-term power purchases that were not included in previously available emissions data.

2 Global warming potentials for calculating CO2-equivalents: CO2 = 1; CH4 = 25; N2O = 298

3 Regional average CO2 emissions in pounds per megawatt-hour, used to estimate CO2 from market energy purchases for CO2-equivalent emission rates, are provided by the Michigan Public Service Commission.

Information about our natural gas delivery

If your company is required to report, you may need information about natural gas you purchased from us. The amount of natural gas consumed can be found on your We Energies bill or in the My Account section of our website. As a service to customers, we provide the heating value of your natural gas below*.

Wisconsin Electric Gas Operations: higher heating value (HHV) – (MMBtu/Mscf)

  2015 2016 2017 2018 2019 2020 2021
Jan 1.047 1.053 1.048 1.046 1.052 1.048 1.048
Feb 1.048 1.052 1.045 1.040 1.044 1.054 1.057
Mar 1.044 1.048 1.043 1.046 1.051 1.050 1.054
Apr 1.045 1.046 1.045 1.042 1.052 1.056 1.054
May 1.047 1.048 1.047 1.040 1.052 1.053 1.058
Jun 1.049 1.046 1.045 1.054 1.058 1.046 1.057
Jul 1.049 1.045 1.047 1.055 1.061 1.051 1.056
Aug 1.051 1.050 1.047 1.044 1.060 1.056 1.055
Sep 1.052 1.048 1.048 1.049 1.062 1.058 1.054
Oct 1.054 1.049 1.049 1.054 1.058 1.061 1.057
Nov 1.053 1.043 1.048 1.052 1.054 1.056 1.055
Dec 1.054 1.048 1.047 1.051 1.051 1.052  

Wisconsin Gas LLC: higher heating value (HHV) – (MMBtu/Mscf)

  2015 2016 2017 2018 2019 2020 2021
Jan 1.044 1.050 1.040 1.044 1.048 1.051 1.048
Feb 1.045 1.050 1.039 1.041 1.046 1.053 1.054
Mar 1.046 1.049 1.038 1.046 1.050 1.052 1.052
Apr 1.050 1.051 1.039 1.043 1.053 1.060 1.053
May 1.052 1.046 1.040 1.041 1.053 1.054 1.055
Jun 1.052 1.044 1.037 1.052 1.059 1.050 1.055
Jul 1.048 1.035 1.036 1.050 1.054 1.050 1.05
Aug 1.046 1.038 1.035 1.048 1.056 1.056 1.056
Sep 1.046 1.035 1.035 1.054 1.059 1.062 1.057
Oct 1.055 1.041 1.040 1.056 1.057 1.059 1.058
Nov 1.052 1.039 1.047 1.053 1.055 1.052 1.053
Dec 1.050 1.040 1.044 1.049 1.052 1.048  

Standard temperature: 60°F
Standard pressure: 14.7 psia
Measurement standard: GPA 2172-09

* Data on this page represent an average heating value for the system and may differ from data that meets state or local regulatory requirements and is used for billing purposes. Accordingly, the data is provided solely for informational purposes and not for billing purposes. We make no claim or representation that the data provided is accurate and make no warranties express or implied, including but not limited to, fitness for a particular purpose, including EPA compliance. No party should rely on such data, including, but not limited to, for billing purposes.