San Joaquin County, California: Power, Data Centers and the Local Economy
Home to Stockton, Tracy and Manteca
San Joaquin County sits inside the data center build-out. The SAVRN Data Center Map lists 6 data centers in San Joaquin County. San Joaquin County is home to Stockton, Tracy, Manteca and Lodi. The Moratorium Tracker holds 1 local measure here (0 in force); the latest is “Proposed county moratorium on data centers”. 360 MW of new generation is planned here across 6 units, led by Zeus BESS LLC (battery storage). 146 MW of it is already under construction or built. Employers here counted 290,380 jobs in 2025, up 12.5% from 2019 (the 5th fastest growth of 58 California counties).
Cities and towns in San Joaquin County
San Joaquin County is home to Stockton, Tracy, Manteca and Lodi.
Unincorporated communities (governed by the county): Acampo, August, Collierville, Country Club, Dogtown, Farmington, French Camp, Garden Acres, Kennedy, Lincoln Village, Linden, Lockeford, Morada, Mountain House, Peters, Taft Mosswood, Terminous, Thornton, Victor, Waterloo, Woodbridge.
Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities.
What changed in San Joaquin County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in California |
|---|---|---|---|---|
| Population (2020 → 2025) | 780,618 | 823,815 | ▲ 5.5% | 14th of 58 by size |
| Total jobs (2019 → 2025) | 258,122 | 290,380 | ▲ 12.5% | 5th of 58 by growth |
| Average annual pay (2019 → 2025) | $49,049 | $63,964 | ▲ 30.4% | — |
| Construction jobs (2019 → 2025) | 13,067 | 14,047 | ▲ 7.5% | 23rd of 51 by growth |
| Electrical contractor jobs (2019 → 2025) | 1,610 | 1,889 | ▲ 17.3% | — |
| Unemployment rate (2019 → August 2026) | 5.7% | 6.5% | ▲ 0.8pts | — |
| Generating capacity added since 2019 | — | 646 MW | — | |
| Generating capacity retired since 2019 | — | 9 MW | — | |
| Planned generation (Aug 2026) | — | 360 MW | 22% of today's fleet | 15th of 30 by size |
646 MW of that came online in 2019 or later, mostly battery storage. Its power plants have 1,609 MW of capacity, 57% of it natural gas. Construction employs 14,047, up 7.5% since 2019. Electrical contractors employ 1,889, up 17.3% since 2019 against up 8.5% statewide, at an average $104,984 a year. 9 MW has retired here since 2019, including Pacific Ethanol Stockton Cogen Plant (natural gas, 5 MW, 2019). Unemployment was 6.5% in August 2026, against 5.7% in 2019. Pacific Gas & Electric Co. is the largest utility serving San Joaquin County, one of 6 with territory here. Its residential customers paid an average 39.62¢/kWh in 2024, above the 20.66¢ median for California utilities. 823,815 people live here, up 5.5% since 2020.
Who powers San Joaquin County
Net change in operating capacity since 2019: +638 MW. Colors follow the fuel legend above.
Utilities with service territory in San Joaquin County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Pacific Gas & Electric Co. | Investor Owned | Bundled | 5,047,461 | 39.62¢ | 30% |
| Modesto Irrigation District | Political Subdivision | Bundled | 103,650 | 21.78¢ | 32% |
| City of Lodi - (CA) | Municipal | Bundled | 23,751 | 22.47¢ | 37% |
| WAPA-- Western Area Power Administration | Federal | Bundled | — | — | 48% |
| Port of Stockton - (CA) | — | — | — | — | — |
| Lathrop Irrigation District | — | — | — | — | — |
Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers.
Operating power plants 38
| Technology | Capacity | Share |
|---|---|---|
| Natural gas | 924 MW | 57% |
| Battery storage | 564 MW | 35% |
| Other technologies | 66 MW | 4% |
| Solar | 37 MW | 2% |
| Hydro | 11 MW | 1% |
| Petroleum | 5 MW | 0% |
| Wind | 3 MW | 0% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| Kola Energy Center | Kola Energy Storage, LLC | Battery storage | 400 MW | 2025 |
| Tracy Combined Cycle Power Plant | MRP San Joaquin Energy LLC. | Natural gas | 336 MW | 2003 |
| Lodi Energy Center | Northern California Power Agny | Natural gas | 289 MW | 2012 |
| North Central Valley | North Central Valley Energy Storage, LLC | Battery storage | 132 MW | 2023 |
| Ripon Generation Station | Modesto Irrigation District | Natural gas | 121 MW | 2006 |
| Stockton Biomass | DTE Stockton LLC | Other technologies | 54 MW | 1987 |
Planned generation 6
| Plant | Technology | MW | Status | Year | Owner |
|---|---|---|---|---|---|
| Zeus BESS | Batteries | 214 MW | Planned, approvals not started | 2031 | Zeus BESS LLC |
| Noosa Energy Storage LLC | Batteries | 99 MW | Under construction (≤50%) | 2026 | Engie North America |
| Tracy BESS | Batteries | 40 MW | Under construction (≤50%) | 2027 | Middle River Power |
| Tracy Renewable Power Plant | Other Waste Biomass | 5 MW | Under construction (≤50%) | 2027 | Tracy Renewable Energy, LLC |
| Stockton 9 - slcva209 | Solar Photovoltaic | 1 MW | Under construction (≤50%) | 2027 | Prologis Logistics Services Incorporated |
| Stockton 1 - slcva801 | Solar Photovoltaic | 1 MW | Under construction (≤50%) | 2027 | Prologis Logistics Services Incorporated |
Retired since 2019
| Plant | Technology | MW | Year |
|---|---|---|---|
| Pacific Ethanol Stockton Cogen Plant | Natural gas | 5 MW | 2019 |
| J.R. Simplot Company | Other technologies | 4 MW | 2024 |
The San Joaquin County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 290,380 | $63,964 | 1.00 |
| Construction | 14,047 | $87,099 | 0.91 |
| Electrical contractors | 1,889 | $104,984 | 0.90 |
Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out.
Data centers and local rules in San Joaquin County
6 data centers in San Joaquin County are on the SAVRN Data Center Map.
Local measures 1
| Measure | Status | Date | |
|---|---|---|---|
| Proposed county moratorium on data centers | Proposed | 2026-09 |
San Joaquin County and its neighbors
Of the 6 counties that border San Joaquin County, Alameda County carries the most build-out activity: data centers, planned generation and operating plants combined.
| County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures |
|---|---|---|---|---|---|---|
| San Joaquin County | 823,815 | ▲ 12.5% | 1,609 MW | 360 MW | 6 | 1 |
| Alameda County | 1,636,630 | ▼ 1.3% | 1,348 MW | 477 MW | 30 | — |
| Amador County | 41,876 | ▼ 0.7% | 234 MW | — | — | — |
| Calaveras County | 46,605 | ▲ 3.6% | 285 MW | — | — | 1 |
| Contra Costa County | 1,170,070 | ▲ 1.4% | 4,240 MW | 8 MW | 6 | — |
| Sacramento County | 1,618,460 | ▲ 7.9% | 1,750 MW | 660 MW | 21 | — |
| Stanislaus County | 557,719 | ▲ 3.1% | 1,505 MW | 100 MW | 6 | 1 |
More of California
San Joaquin County, answered from the record
Who provides electricity in San Joaquin County, California?
6 utilities have service territory in San Joaquin County in the EIA-861 2024 report: Pacific Gas & Electric Co., Modesto Irrigation District, City of Lodi - (CA), WAPA-- Western Area Power Administration. The largest, Pacific Gas & Electric Co., charged residential customers 39.62¢/kWh on average in 2024.
What county is Stockton, CA in?
Stockton is in San Joaquin County, California. About 324,597 people live there (2025 Census estimate).
What county is Tracy, CA in?
Tracy is in San Joaquin County, California. About 101,901 people live there (2025 Census estimate).
What county is Manteca, CA in?
Manteca is in San Joaquin County, California. About 96,693 people live there (2025 Census estimate).
What power plants are in San Joaquin County?
38 operating plants with 1,609 MW of capacity. The largest is Kola Energy Center (400 MW, battery storage).
How much new power is planned in San Joaquin County?
360 MW across 6 units in the August 2026 EIA-860M inventory, 146 MW of it under construction or built. The largest owner is Zeus BESS LLC.
Are there data centers in San Joaquin County?
Yes. The SAVRN Data Center Map lists 6 data centers in San Joaquin County.
Is San Joaquin County adding jobs?
Employers counted 290,380 jobs in 2025 against 258,122 in 2019 (+12.5%, BLS QCEW). Construction went from 13,067 to 14,047.
Does San Joaquin County have a data center moratorium?
The SAVRN Moratorium Tracker holds 1 local measure for San Joaquin County, 0 in force.