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SUSTAINABILITY ACCOUNTING STANDARDS BOARD (SASB) INDEX

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SASB Index For Consumers Energy – Electric Utilities and Power Generation

We have provided a Sustainability Accounting Standards Board (SASB) Index to identify where we make disclosures and provide information in the Electric Utilities & Power Generation industry section within the infrastructure sector.

Greenhouse Gas Emissions & Energy Resource Planning Air Quality Water Management Coal Ash Management Energy Affordability Workforce Health & Safety End-Use Efficiency & Demand Nuclear Safety & Emergency Management Grid Resiliency Activity Metrics

Greenhouse Gas Emissions & Energy Resource Planning

Greenhouse Gas Emissions & Energy Resource Planning
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Greenhouse Gas Emissions & Energy Resource Planning

IF-EU-110a.1

(1) Gross global Scope 1 emissions, percentage covered under (2) emissions-limiting regulations, and (3) emissions-reporting regulations

2024 CDP Report (RY 2023)

IF-EU-110a.2

Greenhouse gas (GHG) emissions associated with power deliveries

2024 CDP Report (RY 2023)

IF-EU-110a.3

Discussion of long-term and short-term strategy or plan to manage Scope 1 emissions, emissions reduction targets, and an analysis of performance against those targets

2024 CDP Report (RY 2023)
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Air Quality

Air Quality
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Air Quality

IF-EU-120a.1

Air emissions of the following pollutants: (1) NOx (excluding N2O), (2) SOx, (3) particulate matter (PM10), (4) lead (Pb), and (5) mercury (Hg); percentage of each in or near areas of dense population

2024 ESG & Sustainability Report
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Water Management

Water Management
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Water Management

IF-EU-140a.1

(1) Total water withdrawn, (2) total water consumed, percentage of each in regions with High or Extremely High Baseline Water Stress

2024 CDP Report (RY 2023)

IF-EU-140a.2

Number of incidents of non-compliance associated with water quality permits, standards, and regulations

0

IF-EU-140a.3

Description of water management risks and discussion of strategies and practices to mitigate those risks

2024 CDP Report (RY 2023)
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Coal Ash Management

Coal Ash Management
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Coal Ash Management

IF-EU-150a.1

Amount of coal combustion products (CCPs) generated, (2) percentage recycled

262,268.85 yd3 CCR generated, 13% recycled

IF-EU-150a.2

Description of coal combustion products (CCPs) management policies and procedures for active and inactive operations

CCR Rule Compliance Data and Information

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Energy Affordability

Energy Affordability
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Energy Affordability

IF-EU-240a.1

Average retail electric rate for (1) residential, (2) commercial, and (3) industrial customers

(1) Residential: 18.55 cents per kWh

(2) Commercial 14.23 cents per kWh

(3) Industrial 7.84 cents per kWh

IF-EU-240a.3

(1) Number of residential customer electric disconnections for non-payment, (2) percentage reconnected within 30 days

(1) 95,593

(2) 88%

IF-EU-240a.4

Discussion of impact of external factors on customer affordability of electricity, including the economic conditions of the service territory

2024 Sustainability Report (RY 2023)
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Workforce Health & Safety

Workforce Health & Safety
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Workforce Health & Safety

IF-EU-320a.1

1) Total recordable incident rate (TRIR), (2) fatality rate, and (3) near miss frequency rate (NMFR) for (a) direct employees and (b) contract employees

2024 Sustainability Report (RY 2023)
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End-Use Efficiency & Demand

End-Use Efficiency & Demand
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

End-Use Efficiency & Demand

IF-EU-420a.2

Percentage of electric load served by smart grid technology

99.3% of electric load is served by smart grid technology

IF-EU-420a.3

Customer electricity savings from efficiency measures, by market

660,531 MWh total saved from efficiency measures.

Residential Programs: 149,868

Business Programs: 491,035

Education & Awareness: 19,628
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Nuclear Safety & Emergency Management

Nuclear Safety & Emergency Management
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Nuclear Safety & Emergency Management

IF-EU-540a.1

Total number of nuclear power units, broken down by results of most recent independent safety review

N/A

IF-EU-540a.2

Description of efforts to manage nuclear safety and emergency preparedness

N/A
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Grid Resiliency

Grid Resiliency
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Grid Resiliency

IF-EU-550a.1

Number of incidents of non-compliance with physical or cybersecurity standards or regulations

*Due to the sensitive nature of this information we have elected to not disclose publicly

IF-EU-550a.2

(1) System Average Interruption Duration Index (SAIDI), (2) System Average Interruption Frequency Index (SAIFI), and (3) Customer Average Interruption Duration Index (CAIDI), inclusive of major event days

• 2024 Reliability Metrics excl MED s – SAIDi, SAIFI, CAIDI

- SAIDI 154.97

- CAIDI 176.78

- SAIFI 0.877

• 2024 Reliability Metrics incl MEDs – SAIDI, SAIFI, CAIDI

- SAIDI 502.55

- CAIDI 379.86

- SAIFI 1.323
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Activity Metrics

Activity Metrics
Topic Code Metric Additional Information (2025- RY 2024 unless otherwise specified)

Activity Metrics

IF-EU-000.A

Number of: (1) residential, (2) commercial, and (3) industrial customers served

2024 Sustainability Report (RY 2023)

(1) residential 1,673,439, (2) commercial 241,442, (3) industrial 2,176

IF-EU-000.B

Total electricity delivered to: (1) residential, (2) commercial, (3) industrial, (4) all other retail customers, and (5) wholesale customers

2024 Actual Deliveries (MWh) - Weather-Normal

  • (1) Residential: 12,571,437
  • (2) Commercial: 12,652,804
  • (3) Industrial: 11,158,604
  • (4) Other: 134,342
  • (5) Wholesale: 259,046

IF-EU-000.C

Length of transmission and distribution lines

96,637 miles Distribution

IF-EU-000.D

Total electricity generated, percentage by major energy source, percentage in regulated markets

2024 Electricty generated by energy source

  • Coal: 8,163,687 MWh 23.84%
  • Gas: 24,543,140 MWh 61.04%
  • Oil: 48,062 MWh 0.02%
  • Hydro: 400,322 MWh 1.36%
  • Solar: 1,138,431 MWh 1.8%
  • Wind: 2,889,390 MWh 8.54%
  • Other Renewable: 953,934 MWh 3.4%

IF-EU-000.E

Total wholesale electricity purchased

5,978,661 MWh
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Updated June 2025

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