Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/2517
EIA plant 2517
Port Jefferson · Suffolk · NY
Port Jefferson
Operated by National Grid Generation LLC
Published location
Where is Port Jefferson?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
40.949696, -73.078507
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the NY plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
122,712
24,341
35,943
49,221
529,918
680,838
7107,353
843,306
95,699
1011,981
113,678
121,994
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 22,712 |
| 2 | 4,341 |
| 3 | 5,943 |
| 4 | 9,221 |
| 5 | 29,918 |
| 6 | 80,838 |
| 7 | 107,353 |
| 8 | 43,306 |
| 9 | 5,699 |
| 10 | 11,981 |
| 11 | 3,678 |
| 12 | 1,994 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 22,712 MWh |
| 2 | 4,341 MWh |
| 3 | 5,943 MWh |
| 4 | 9,221 MWh |
| 5 | 29,918 MWh |
| 6 | 80,838 MWh |
| 7 | 107,353 MWh |
| 8 | 43,306 MWh |
| 9 | 5,699 MWh |
| 10 | 11,981 MWh |
| 11 | 3,678 MWh |
| 12 | 1,994 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 3 | Natural Gas Steam Turbine | NG | 188 | OP |
| 4 | Natural Gas Steam Turbine | NG | 188 | OP |
| GT2 | Natural Gas Fired Combustion Turbine | NG | 53 | OP |
| GT3 | Natural Gas Fired Combustion Turbine | NG | 53 | OP |
| GT1 | Petroleum Liquids | DFO | 16 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
2517
Sector
Electric Utility
Water source
Long Island Sound
Data edition
2024-final
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Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Port Jefferson power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Port Jefferson
Variation in the published months
Across 12 numeric monthly generation entries, 7 has the highest recorded value (107,353 MWh) and 12 the lowest (1,994 MWh). Their difference is 105,359 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 5 numeric rows displayed in this table, MW ranges from 16 (GT1) to 188 (3, 4). The difference is 172 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 3 | Natural Gas Steam Turbine | 188.0 | 192.0 | 189.2 | 15.0 |
| 4 | Natural Gas Steam Turbine | 188.0 | 193.0 | 194.7 | 15.0 |
| GT1 | Petroleum Liquids | 16.0 | 12.9 | 16.6 | 10.6 |
| GT2 | Natural Gas Fired Combustion Turbine | 53.0 | 42.6 | 46.7 | 37.0 |
| GT3 | Natural Gas Fired Combustion Turbine | 53.0 | 40.1 | 47.1 | 37.0 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.