Power by county

California: data center power by county

Browse the 58 counties in California with a data center power and grid screening profile. Compare substation counts and highest grid access voltage by county, then open a county for its full outlook.

State overview

Counties with a profile: 58 counties
Industrial retail rate (state industrial average): 21.6¢/kWh

The industrial retail rate is a state industrial average and applies to every county below. The per county figures are substation count and highest grid access voltage, which do vary by county.

Map

The same county map as the national page, framed to California. Switch layers to compare substations, grid access voltage, and more; the color scale is the national one, so a county reads the same shade here as nationally. Click a county to open its profile.

Transmission voltage

Up to 69 kV
115 to 138 kV
161 to 230 kV
287 to 345 kV
345 to 500 kV
500 kV and up

Voltage not known

About this layer

Highest transmission voltage reachable in or crossing the county, in kilovolts.

Source

Source: public records

How to read this

Each color is one measured quantity for that county, shown so you can read it and judge for yourself. Click a county, or choose one from the picker, to open its panel. The color scale is the national one, so a California county reads the same shade here as on the national map.

OverlayExisting data centers

Where data centers already stand. Off by default, and shown purely as background: the markers are context a reader can weigh, and this map draws no conclusions from them.

OverlayFreight rail

In-service freight mainline, the track heavy equipment like transformers and generator sets actually moves over. Off by default and shown purely as background: whether a line runs near a specific site is something to read off the map for yourself, not a judgment this map makes for you.

Counties

Sort by any column to browse. The order is a view of the data, not a ranking, and the list opens alphabetically by county. Select a county for its serving utilities, market, interconnection queue, and sources.

Published counties, sortable by county name, substation count, or highest grid access voltage. Listed for browsing, not ranked.

Alameda	108	500 kV
Alpine	1	120 kV
Amador	25	230 kV
Butte	42	500 kV
Calaveras	15	230 kV
Colusa	21	500 kV
Contra Costa	128	500 kV
Del Norte	17	115 kV
El Dorado	19	230 kV
Fresno	138	500 kV
Glenn	14	500 kV
Humboldt	41	115 kV
Imperial	111	500 kV
Inyo	29	1,000 kV
Kern	330	1,000 kV
Kings	47	500 kV
Lake	19	230 kV
Lassen	35	345 kV
Los Angeles	559	1,000 kV
Madera	34	230 kV
Marin	17	230 kV
Mariposa	7	230 kV
Mendocino	16	115 kV
Merced	46	500 kV
Modoc	28	500 kV
Mono	13	1,000 kV
Monterey	61	500 kV
Napa	11	230 kV
Nevada	16	120 kV
Orange	190	500 kV
Placer	61	230 kV
Plumas	28	230 kV
Riverside	210	500 kV
Sacramento	371	500 kV
San Benito	7	500 kV
San Bernardino	276	500 kV
San Diego	163	500 kV
San Francisco	12	230 kV
San Joaquin	126	500 kV
San Luis Obispo	29	500 kV
San Mateo	58	230 kV
Santa Barbara	42	230 kV
Santa Clara	101	500 kV
Santa Cruz	27	500 kV
Shasta	84	500 kV
Sierra	10	345 kV
Siskiyou	55	500 kV
Solano	61	500 kV
Sonoma	64	230 kV
Stanislaus	90	500 kV
Sutter	20	500 kV
Tehama	18	500 kV
Trinity	17	230 kV
Tulare	70	287 kV
Tuolumne	24	230 kV
Ventura	55	500 kV
Yolo	26	500 kV
Yuba	24	230 kV

What this is

These are screening-grade grid profiles for California, describing the public power picture around each county rather than any specific parcel. They are a starting point for siting diligence, not a substitute for an interconnection study. To screen a specific address, run it through the site tool.

Map