Con Edison | 19 minSAIDI 2024, excl. major storms | 0.11SAIFI per customer, 2024 | 3.7 MDec 2025 | 138,590 mi72% underground | New York | ElectricityGasSteamTransmission |
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FPL | 45.7 minSAIDI 2024, excl. major events | 0.44SAIFI per customer, 2024 | 6 M+customer accounts, 2025 | 80,400 miend of 2023 | Florida | GenerationTransmissionDistribution |
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PECO | 59.3 minSAIDI 2025 early release, excl. major events | 0.67SAIFI per customer, 2025 early release | 1.7 Melectric, Dec 2025 | 22,870 mi43% underground | Pennsylvania | TransmissionDistributionSupplyGas |
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Eversource | 66.1 minSAIDI 2024, NSTAR Electric, excl. major events | 0.64SAIFI 2024, NSTAR Electric | 3.49 Melectric, Dec 2025 | 59,870 micircuit miles, 32% underground | 3 states | TransmissionDistributionGas |
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Oncor | 78.1 minSAIDI 2025, excl. storms | 1.1SAIFI per customer, 2025 | 4.11 Mdelivery points, Dec 2025 | 127,398 mi29% underground | Texas | TransmissionDistribution |
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AES | 87 / 106 minSAIDI 2024 Indiana / Ohio, excl. major events | 1.06 / 0.87SAIFI 2024 Indiana / Ohio, excl. major events | 1.07 M533,000 Indiana + 541,000 Ohio, 2025 | 29,000 miabout 34% underground | Indiana, Ohio | GenerationTransmissionDistribution |
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We Energies | 93 minSAIDI 2025 early release, excl. major events | 0.66SAIFI per customer, 2025 early release | 1.18 Melectric, Dec 2025 | 46,400 mi58% underground | Wisconsin | GenerationDistributionGasSteam |
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Ameren | 94 / 121 minSAIDI 2024 Missouri / Illinois, excl. major events | 0.67 / 0.91SAIFI 2024 Missouri / Illinois, excl. major events | 2.5 M1.3 M Missouri + 1.2 M Illinois, 2025 | 80,341 mi25% underground in Missouri, 16% in Illinois | Missouri, Illinois | GenerationTransmissionDistributionGas |
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PPL Electric | 115.6 minSAIDI 2025 early release, excl. major events | 0.77SAIFI per customer, 2025 early release | 1.5 MDec 2025 | 45,762 mi20% underground | Pennsylvania | TransmissionDistributionSupply |
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National Grid | 140 minSAIDI 2025 NY early release, excl. major events; MA 91 min | 1.11SAIFI 2025 NY early release; MA 0.84 | 3.1 Melectric, 2025 early release: 1.7 M NY, 1.4 M MA | – | 2 states | GenerationTransmissionDistributionGas |
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CenterPoint | 151 minSAIDI 2025 Houston, excl. major events, early release | 1.77SAIFI 2025 Houston, excl. major events, early release | 3.01 Mmetered electric customers, Dec 2025 | 66,733 miHouston 59,559 mi (half underground) + Indiana 7,174 mi | Texas, Indiana | GenerationTransmissionDistributionGas |
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DTE Energy | 151 minSAIDI 2025, excl. major events, early release | 1.07SAIFI 2025, excl. major events, early release | 2.3 Melectric customers, 2025 | 45,994 mi32% underground | Michigan | GenerationDistributionGas |
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Georgia Power | 155 minSAIDI 2025 early release, excl. major events | 1.44SAIFI per customer, 2025 early release | 2.83 Mretail customers, Dec 2025 | 80,865 midistribution lines, Dec 2025 | Georgia | GenerationTransmissionDistribution |
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Consumers Energy | 163 minSAIDI 2025, excl. major events, early release | 0.88SAIFI 2025, excl. major events, early release | 1.9 Melectric customers, 2025 | 97,785 mi10% underground | Michigan | GenerationDistributionGas |
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Duke Energy | 168 minSAIDI 2024, Duke Energy Carolinas (NC), excl. major events | 1.24SAIFI 2024, Duke Energy Carolinas (NC) | 8.7 Melectric, 2025 | 288,100 miconductor miles, 41% underground | 6 states | GenerationTransmissionDistributionGas |
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PSE | 178 minSAIDI 2025 early release, excl. major events | 1.1SAIFI per customer, 2025 early release | 1.26 Melectric, Dec 2025 | – | Washington | GenerationTransmissionDistributionGas |
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Entergy | 213 minSAIDI 2024, Entergy Louisiana, excl. major events | 1.55SAIFI 2024, Entergy Louisiana | 3.06 MDec 2025 | 106,400 micircuit miles | 4 states | GenerationTransmissionDistribution |
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JCP&L | 255 minSAIDI 2024, excl. major events | 1.95SAIFI per customer, 2024 | 1.2 Mdistribution customers, 2025 | 24,892 mioverhead and underground, Dec 2025 | New Jersey | TransmissionDistribution |
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PG&E | 276 minSAIDI 2024, excl. major events | 1.83SAIFI per customer, 2024 | 5.66 M2025 average | 109,000 mi27% underground | California | GenerationTransmissionDistributionGas |
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MLGW | 283 minSAIDI 2025 early release, excl. major events | 1.99SAIFI per customer, 2025 early release | 446,000electric customers, Dec 2025 | – | Shelby County | DistributionGasWater |
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Evergy | – | – | 1.7 M2025 | 61,300 micircuit miles, 27% underground | Kansas, Missouri | GenerationTransmissionDistribution |
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