Diablo Canyon — Plant Summary
- EIA Plant ID
- 6099
- Capacity
- 2323 MW
- Primary Fuel
- Nuclear
- Technology
- Nuclear
- Status
- Operating
- Location
- San Luis Obispo, CA
- Operating Since
- 1985
- Generators
- 2
- Operator
- Pacific Gas & Electric Co.
- Parent Company
- PG&E
- Annual Generation
- 17,558,394 MWh
- Capacity Factor
- 86.4%
- Balancing Authority
- California Independent System Operator
- ISO/RTO
- CAISO
- NERC Region
- WECC
Diablo Canyon
OperatingNuclear
Ranked #1 of 1 Nuclear plants in CA#18 of 57 nationally
2323 MW Nuclear operating in San Luis Obispo, CA — California Independent System Operator
EIAGEMWD
2,323 MW
Nameplate Capacity
2
Generators
units
Nuclear
Technology
1985
Operating Since
Location
Coordinates
35.2115, -120.8555
County
San Luis Obispo, CA
Nearby Plants
- Camp San Luis ObispoSolar1.2 MW · 16.6 km
- CA-DGS-California Men's ColonySolar2.2 MW · 19.2 km
- Stenner Creek SolarSolar4.5 MW · 19.2 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pacific Gas & Electric Co. | Pacific Gas and Electric | Pacific Gas and Electric Company |
| Owner(s) | Pacific Gas & Electric Co. | PG&E | — |
| Status | Operating | operating | — |
Ownership Chain
About
The Diablo Canyon Power Plant is a nuclear power plant near Avila Beach in San Luis Obispo County, California. Following the permanent shutdown of the San Onofre Nuclear Generating Station in 2013, Diablo Canyon is now the only operational nuclear plant in California, as well as the state's largest single power station. It was the subject of controversy and protests during its construction, with nearly two thousand civil disobedience arrests in a two-week period in 1981.
Read more on WikipediaDiablo Canyon Power Plant is a 2,323 MW nuclear power plant located in San Luis Obispo County, California. The plant, which began operating in 1985, is owned and operated by Pacific Gas & Electric (PG&E). It consists of two nuclear reactors and is the largest power plant in California, and the 17th largest nuclear plant in the United States. Diablo Canyon operates within the California Independent System Operator (CAISO) balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
The plant's latest annual generation was 17,558,394 MWh, achieving a capacity factor of 86.4%. Financial data indicates an installed cost of $3,573.58 per kW, based on FERC filings. The plant has been the subject of 10 news articles, all pertaining to regulatory matters.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
California Independent System Operator
Grid Voltage
500 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
1.6M MWh
Latest Month
17.6M MWh
Annual Generation
86.4%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$4,135/kW
Installed Cost
$31.0/MWh
Operating Cost
PACIFIC GAS AND ELECTRIC COMPANY
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Diablo Canyon · 230 kV
Substation Distance
< 10 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
CAISO
LMP Node
DIABLO2_7_B1
Pricing Hub
TH_SP15_GEN-APND
Location Type
Pricing Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
Regulatory·permitting
Diablo Canyon power plant
A state regulator is requiring California's last nuclear power plant to conserve 4000 acres of surrounding land to keep operating until...
California (regulator)Diablo Canyon (operator)
LAist·2 days ago
Regulatory·permitting
Diablo Canyon clears last California permit hurdle to keep running
Central Coast Water authorities approved waste discharge permits for Diablo Canyon nuclear plant Thursday, making it nearly certain it will...
Diablo Canyon (operator)Central Coast Water (regulator)
AOL.com·4 days ago
Regulatory·federal policy
California bill looks to craft advanced nuclear exception to moratorium -- ANS / Nuclear Newswire
Proposed legislation in California could exempt certain reactor designs from the state's long-standing moratorium on new nuclear generation,...
California (regulator)
American Nuclear Society -- ANS·2 weeks ago
Regulatory·permitting
Diablo Canyon nuclear power plant takes big step toward extending life until 2030
PG&E got a new wastewater discharge permit and Clean Water Act certification.
Diablo Canyon (operator)PG&E (operator)
San Luis Obispo Tribune·2 weeks ago
Last updated 2026-03-14
View all 10 articles