Datacenter Sites in San Mateo County, California
San Mateo County has 70 scored datacenter candidate sites averaging 51.9/100 DC Readiness, with a catalogued aggregate of 5,229 MW. FEMA rates local natural-hazard risk as "Relatively High".
At a glance
San Mateo County, California has 70 scored datacenter candidate sites averaging 51.9/100 DC Readiness, about 14% above the California average of 45.4. It ranks 34th of 58 California counties by number of sites and 2nd by average score. The top-scoring site is Hunters Point at 61.3/100.
Site-selection context for San Mateo County
How does San Mateo County compare with other counties in California?
By number of scored sites, San Mateo County ranks 34th of the 58 California counties with a county page, holding 0.8% of the state's 8,490 sites. Its average DC Readiness of 51.9/100 ranks 2nd in the state and is roughly in line with the national average of 53.0. Nationally it has the 527th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 11 score 55 or higher.
What types of datacenter sites are in San Mateo County?
Substation-Adjacent sites are the most common (34, 49% of the county's inventory), followed by industrial (19) and greenfield (7). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.
What are power cost, hazard, water and fiber conditions in San Mateo County?
Industrial electricity averages 22.78¢/kWh and commercial 28.85¢/kWh. FEMA's National Risk Index rates the county "Relatively High" (48). WRI water stress is high. 12 fiber providers report service in the county. The climate runs 1,000 cooling degree days a year with a mean temperature of 59°F. Land is valued around $12,311 an acre.
By site type
Top datacenter sites in San Mateo County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| Hunters Point | Brownfield | 115 kV | 427 MW | 7.6 yrs | 61.3 |
| MARTIN | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 59.0 |
| S.L.A.C. | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 58.8 |
| RAVENSWOOD | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 58.0 |
| MONTA VISTA (UPPER) | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.8 |
| JEFFERSON | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.6 |
| S.L.A.C. TAP | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.4 |
| SAN MATEO | Substation-Adjacent | 230 kV | 300 MW | 7.6 yrs | 57.3 |
| TRANS BAY CABLE FACILITY | Substation-Adjacent | 200 kV | 100 MW | 7.6 yrs | 56.0 |
| WESTINGHOUSE | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 55.2 |
| COLORADO POWERSTATION | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 55.0 |
| SF State University | Brownfield | 115 kV | 1 MW | 7.6 yrs | 54.9 |
| OZ San Mateo | Greenfield | — | — | 7.6 yrs | 54.8 |
| LARKIN | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.7 |
| WHISMAN | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.6 |
| AMES DISTRIBUTION | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.6 |
| HUNTERS POINT | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.6 |
| TAP308172 | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.6 |
| BAYSHORE | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.6 |
| MT. VIEW | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.5 |
| COOLEY LANDING | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.5 |
| UNITED COGEN INC | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 54.4 |
| DALY CITY | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 53.6 |
| BAIR | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 53.5 |
| EAST GRANDE | Substation-Adjacent | 115 kV | 100 MW | 7.6 yrs | 53.5 |
Every scored site in San Mateo County
All 70 sites, best first.
- Hunters Point · 61.3
- MARTIN · 59.0
- S.L.A.C. · 58.8
- RAVENSWOOD · 58.0
- MONTA VISTA (UPPER) · 57.8
- JEFFERSON · 57.6
- S.L.A.C. TAP · 57.4
- SAN MATEO · 57.3
- TRANS BAY CABLE FACILITY · 56.0
- WESTINGHOUSE · 55.2
- COLORADO POWERSTATION · 55.0
- SF State University · 54.9
- OZ San Mateo · 54.8
- LARKIN · 54.7
- HUNTERS POINT · 54.6
- BAYSHORE · 54.6
- AMES DISTRIBUTION · 54.6
- Substation-Adjacent site · 8ba4cd22 · 54.6
- WHISMAN · 54.6
- COOLEY LANDING · 54.5
- MT. VIEW · 54.5
- UNITED COGEN INC · 54.4
- DALY CITY · 53.6
- DALY CITY TAP · 53.5
- BAIR · 53.5
- STELLING · 53.5
- LAWNDALE · 53.5
- SHREDDER · 53.5
- EAST GRANDE · 53.5
- SAN CARLOS · 53.4
- SERRAMONTE · 53.3
- SAN FRANCISCO AIRPORT · 53.3
- BELMONT · 53.2
- MILLBRAE · 53.1
- BURLINGAME · 53.1
- BAY MEADOWS · 53.0
- UNITED COGEN TAP · 52.5
- EC FFE San Mateo County · 51.1
- EC Near San Francisco Intl Airport Ct Project · d232621d · 50.7
- EC Near San Francisco Intl Airport Ct Project · 936e1db4 · 50.4
- SLAC National Accelerator Laboratory · dded9916 · 49.2
- Palo Alto HCS Menlo Park Div. · fb7f3d66 · 49.1
- Mine Site · 4caece36 · 48.7
- 1895 East Bayshore Road · 48.7
- Palo Mobile Estates · 48.7
- Mine Site · d515338a · 48.7
- NE Corner of University & Bay · 48.6
- East Palo Alto - Green Street 794 · 48.6
- 791-805 Runnymede Street · 48.6
- 855 Runnymede Street · 48.6
- 1508 Bay Rd., East Palo Alto · 48.6
- 872 Runnymede · 48.6
- 875 O'Conner Street · 48.6
- EC Near San Francisco Intl Airport Ct Project · aa9d9610 · 48.6
- 1103 Weeks Street · 48.5
- 1800 Bay Road · 48.5
- Cooley Landing Area B · 48.5
- Cooley Landing Area A · 48.5
- 1802-1804 Bay Road · 48.5
- Iwasaki/Olson Development · 48.5
- Cooley Landing · 817de4c1 · 48.5
- Former Rogge's Auto Wrecking/City Corp Yard · 48.5
- EC Near San Francisco Intl Airport Ct Project · f036a5f5 · 48.2
- Golden Gate National Cemetery · 01745c87 · 47.8
- Cooley Landing · 00e99055 · 47.6
- Mine Site · 8f471295 · 47.5
- Windmill School · 47.4
- EC Near San Francisco Intl Airport Ct Project · cf6091ee · 47.0
- SAN FRANCISCO INTL ARPT · 256e3d87 · 46.9
- Mine Site · 28d5383c · 46.7
San Mateo County datacenter FAQ
How many datacenter sites are in San Mateo County?
70 scored datacenter candidate sites, averaging 51.9/100 DC Readiness. That is the 34th-most of 58 California counties with five or more sites.
What is the highest-scoring datacenter site in San Mateo County?
Hunters Point scores 61.3/100 DC Readiness, the highest of the 70 scored sites in San Mateo County (a brownfield site).
Does San Mateo County offer datacenter tax incentives?
No datacenter-specific tax incentive is on record for San Mateo County in the GridCensus county dataset.
What is the natural-hazard risk in San Mateo County?
FEMA's National Risk Index rates San Mateo County as "Relatively High" (score 48).
What are industrial electricity rates in San Mateo County?
Average industrial electricity is 22.78¢/kWh and commercial is 28.85¢/kWh in San Mateo County.
More in California
- All datacenter sites in California· 8,490 sites
- Operating datacenters in California
- Electric substations in California
- Los Angeles County· 691 sites · avg 49.8
- Fresno County· 628 sites · avg 43.8
- San Diego· 550 sites · avg 47.7
- Riverside County· 376 sites · avg 45.5
- Yolo County· 363 sites · avg 46.7
- Alameda· 313 sites · avg 49.4
- Substation-Adjacent sites in California
- Industrial sites in California
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Datacenter candidate sites in San Mateo County, California”, https://gridcensus.com/datacenter-sites/california/san-mateo-county (data as of November 12, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for San Mateo County, 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.