Humboldt Bay
Natural gas power plant in Humboldt County, California. 167 MW of nameplate capacity across 10 generators, operated by Pacific Gas & Electric Co..
Also known as Humboldt Bay Power Plant · EIA plant 246
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Key facts
- Capacity
- 167 MWNameplate
- Generators
- 10 operatingEIA-860M, August 2026
- Operating since
- September 2010First generator online
- Operator
- Pacific Gas & Electric Co.EIA operator ID 14328
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- Humboldt County, CA40.7415, −124.2103
- EIA plant ID
- 246EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Humboldt Bay produces
Free · EIA-923Net generation, 2025
360 GWh
359,514 MWh, final
Capacity factor, 2025
24.6%
2024: 23.9%
January to July 2026
163 GWh
Provisional
Range, 2015 to 2025
350.9–546.2
GWh a year. Low 2024, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 551,783 | Not reported | 12 of 12 |
| 2001 | 677,633 | Not reported | 12 of 12 |
| 2002 | 376,679 | Not reported | 12 of 12 |
| 2003 | 225,910 | Not reported | 12 of 12 |
| 2004 | 375,622 | Not reported | 12 of 12 |
| 2005 | 444,498 | Not reported | 12 of 12 |
| 2006 | 441,807 | Not reported | 12 of 12 |
| 2007 | 482,399 | Not reported | 12 of 12 |
| 2008 | 49,798 | Not reported | 1 of 12 |
| 2009 | 540,859 | Not reported | 12 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | 79,409 | 37.3% | 2 of 12 |
| 2012 | 30,915 | 26.6% | 1 of 12 |
| 2013 | 358,039 | 24.5% | 12 of 12 |
| 2014 | 231,034 | 23.5% | 8 of 12 |
| 2015 | 402,544 | 27.5% | 12 of 12 |
| 2016 | 366,744 | 25.0% | 12 of 12 |
| 2017 | 431,582 | 29.5% | 12 of 12 |
| 2018 | 383,862 | 26.2% | 12 of 12 |
| 2019 | 405,186 | 27.7% | 12 of 12 |
| 2020 | 484,335 | 33.0% | 12 of 12 |
| 2021 | 546,228 | 37.3% | 12 of 12 |
| 2022 | 453,689 | 31.0% | 12 of 12 |
| 2023 | 425,970 | 29.1% | 12 of 12 |
| 2024 | 350,914 | 23.9% | 12 of 12 |
| 2025 | 359,514 | 24.6% | 12 of 12 |
| 2026 (provisional, partial year) | 162,530 | 19.1% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDCO₂, 2010
299,774
US short tons. 2009: 414,449
SO₂, 2010
34
US short tons
NOx, 2010
802
US short tons
2 of 2 EPA units reported CO₂ in 2010 (1, 2), matched to EIA plant 246 through the EPA–EIA crosswalk.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| IC1 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC2 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC3 | Natural Gas Internal Combustion Engine | 16.7 | March 2011 |
| IC4 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC5 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC6 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC7 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC8 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC9 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
| IC10 | Natural Gas Internal Combustion Engine | 16.7 | September 2010 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Pacific Gas & Electric Co. as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Humboldt Bay
More plants operated by Pacific Gas & Electric Co.
Questions about Humboldt Bay
How much power does Humboldt Bay produce?
Humboldt Bay reported 359,514 MWh (360 GWh) of net generation in 2025, a 24.6% capacity factor on 167 MW of nameplate capacity. From January to July 2026 it reported 163 GWh, which is provisional.
Where is Humboldt Bay?
Humboldt Bay is in Humboldt County, California, at 40.7415, −124.2103. It is in the California Independent System Operator balancing area (CISO).
Who operates Humboldt Bay?
EIA-860M for August 2026 lists Pacific Gas & Electric Co. as the operator (EIA operator ID 14328). The operator is not always the owner.
When did Humboldt Bay start operating?
Its first generator began operating in September 2010, according to EIA-860M.
Does InfraMap have power prices for Humboldt Bay?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Humboldt Bay, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page