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Electric Substations in California

3,003 named substations in California, with the highest-voltage facilities listed first. Each substation profile shows voltage class, connected transmission lines, and the datacenter candidate sites closest to it.

At a glance

California has 4,260 electric substation records in the HIFLD dataset, 3,003 of them with a station name (the other 1,257 are unnamed tap points, risers and line ends). 44 named substations operate at 345 kV or above, 38 of them at 500 kV or more. The highest recorded voltage is 500 kV and the median is 69 kV.

How is California's substation network split by voltage?

By maximum voltage, the named substations break down as 38 at 500 kV and above; 6 at 345–499 kV; 384 at 230–344 kV; 697 at 115–229 kV; 379 at 69–114 kV; 1,439 below 69 kV; 60 withvoltage not recorded. 1% of California's named substations operate at 345 kV or above, against 8% across all 16,654 named US substations. The state median of 69 kV is below the national median of 115 kV.

How does California compare with other states?

California ranks 1st of 50 states and DC by number of named substations and 7th by named substations at 345 kV or above. It also has 8,490 scored datacenter candidate sites with an average DC Readiness score of 45.4 (national average 53), and an average power sub-score of 35.7 against 37.4 nationally. Most of those sites (7,165) are in the CAISO market.

Which substations in California have the highest voltage?

SubstationMax voltageConnected linesLine owner
ADELANTO500 kV12LADWP
ANTELOPE500 kV17SOUTHERN CALIFORNIA EDISON
COLORADO RIVER500 kV3SOUTHERN CALIFORNIA EDISON
DEVERS500 kV15SOUTHERN CALIFORNIA EDISON
DIABLO CANYON500 kV5PACIFIC GAS & ELECTRIC COMPANY
EAST COUNTY500 kV2SAN DIEGO GAS & ELECTRIC
GATES500 kV15PACIFIC GAS & ELECTRIC COMPANY
IMPERIAL VALLEY500 kV1IMPERIAL IRRIGATION DISTRICT
IMPERIAL VALLEY500 kV8SAN DIEGO GAS & ELECTRIC
INLAND EMPIRE500 kV1AZUSA LIGHT & POWER
LINDE500 kV1AZUSA LIGHT & POWER
LOS BANOS500 kV16PACIFIC GAS & ELECTRIC COMPANY
LUGO500 kV15SOUTHERN CALIFORNIA EDISON
METCALF 1500 kV4PACIFIC GAS & ELECTRIC COMPANY
MIDWAY500 kV23PACIFIC GAS & ELECTRIC COMPANY
MIGUEL500 kV14SAN DIEGO GAS & ELECTRIC
MIRA LOMA500 kV17AZUSA LIGHT & POWER
MOSS LANDING500 kV9PACIFIC GAS & ELECTRIC COMPANY
O'BANION500 kV7PACIFIC GAS & ELECTRIC COMPANY
OLINDA500 kV5PACIFIC GAS & ELECTRIC COMPANY
RANCHO VISTA500 kV10AZUSA LIGHT & POWER
RED BLUFF500 kV4UNKNOWN
RINALDI500 kV16LOS ANGELES DEPARTMENT OF WATER & POWER
ROUND MOUNTAIN500 kV10PACIFIC GAS & ELECTRIC COMPANY
SAN BERNARDINO500 kV11AZUSA LIGHT & POWER
SERRANO500 kV9AZUSA LIGHT & POWER
STATION E (TOLUCA)500 kV15LOS ANGELES DEPARTMENT OF WATER & POWER
SUNCREST500 kV4SAN DIEGO GAS & ELECTRIC
TABLE MT.500 kV13PACIFIC GAS & ELECTRIC COMPANY
TESLA500 kV26PACIFIC GAS & ELECTRIC COMPANY
TRACY500 kV15PACIFIC GAS & ELECTRIC COMPANY
VACA-DIXON500 kV16PACIFIC GAS & ELECTRIC COMPANY
VALLEY500 kV16AZUSA LIGHT & POWER
VICTORVILLE500 kV2AZUSA LIGHT & POWER
VICTORVILLE500 kV11LADWP
VINCENT500 kV14SOUTHERN CALIFORNIA EDISON
WHIRLWIND500 kV4SOUTHERN CALIFORNIA EDISON
WINDHUB500 kV5SOUTHERN CALIFORNIA EDISON
BORDERTOWN345 kV2SIERRA PACIFIC POWER COMPANY
CAL PEAK POWER VACA DIXON345 kV0—
CAPACITOR345 kV0—
COYOTE CREEK345 kV2AZUSA LIGHT & POWER
HILLTOP345 kV2PACIFICORP
OXFORD345 kV0—
CENTURY287 kV2COLTON ELECTRIC UTILITY DEPARTMENT
RECTOR287 kV11AZUSA LIGHT & POWER
SPRINGVILLE287 kV8AZUSA LIGHT & POWER
AIRPORT230 kV3REU
AIRWAY230 kV6GLENDALE WATER & POWER
ALAMITOS230 kV7AZUSA LIGHT & POWER
ALTRUS230 kV1PACIFICORP
ARBWIND230 kV2AZUSA LIGHT & POWER
ARCO230 kV6PACIFIC GAS & ELECTRIC COMPANY
ARCOGEN230 kV2—
ASHLAN AVE230 kV1PACIFIC GAS & ELECTRIC COMPANY
BAHIA230 kV4PACIFIC GAS & ELECTRIC COMPANY
BAILEY230 kV5SOUTHERN CALIFORNIA EDISON
BAKERSFIELD230 kV3PACIFIC GAS & ELECTRIC COMPANY
BALCH230 kV4PACIFIC GAS & ELECTRIC COMPANY
BANK C230 kV0—

Every named substation in California

The 1,000 highest-voltage of 3,003 named substations, grouped by voltage band. The rest are linked from each substation's profile.

500 kV and above · 38

345–499 kV · 6

230–344 kV · 384

115–229 kV · 572

Frequently asked questions

How many electric substations are in California?

HIFLD records 4,260 substations in California, of which 3,003 carry a station name. That is the most named substations of any state in the dataset.

What is the highest-voltage substation in California?

38 named substations in California share the top voltage of 500 kV, including ADELANTO, ANTELOPE, COLORADO RIVER.

Which substation in California connects the most transmission lines?

NEWARK has the most connected transmission lines of the named substations listed here, with 30 at up to 230 kV.

How many substations in California are 345 kV or higher?

44 of 3,003 named substations (1%) operate at 345 kV or above, compared with 8% nationally. California ranks 7th of 50 states and DC for named substations at that level.

How many datacenter candidate sites in California are at substations?

1,573 of the 8,490 scored candidate sites in California are substation sites — locations generated at an existing substation. Scored sites across California average 45.4 on the 0–100 DC Readiness scale, against 53 nationally.

Looking for a specific record? The directory lists every substation in California, A to Z.

More on California, and states with similar counts

About this data

Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Electric substations in California”, https://gridcensus.com/substations/california (data as of June 29, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for substations in California is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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