Holtsville
Oil power plant in Suffolk County, New York. 567 MW of nameplate capacity across 10 generators, operated by National Grid Generation LLC.
Also known as Holtsville Power Plant · EIA plant 8007
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Key facts
- Capacity
- 567 MWNameplate
- Generators
- 10 operatingEIA-860M, August 2026
- Operating since
- July 1974First generator online
- Operator
- National Grid Generation LLCEIA operator ID 56505
- Grid
- NYISOBalancing authority NYIS
- Price nodes
- 10 NYISO nodesResource nodes with prices
- Location
- Suffolk County, NY40.8170, −73.0663
- EIA plant ID
- 8007EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Holtsville produces
Free · EIA-923Net generation, 2025
38.7 GWh
38,677 MWh, final
Capacity factor, 2025
0.8%
2024: 0.4%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
13.3–47.1
GWh a year. Low 2017, high 2020
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 231,972 | Not reported | 12 of 12 |
| 2001 | 275,842 | Not reported | 12 of 12 |
| 2002 | 261,682 | Not reported | 12 of 12 |
| 2003 | 283,115 | Not reported | 12 of 12 |
| 2004 | 148,479 | Not reported | 12 of 12 |
| 2005 | 135,220 | Not reported | 12 of 12 |
| 2006 | 61,931 | Not reported | 12 of 12 |
| 2007 | 84,268 | Not reported | 12 of 12 |
| 2008 | 59,273 | Not reported | 12 of 12 |
| 2009 | 46,156 | Not reported | 12 of 12 |
| 2010 | 75,001 | 1.5% | 12 of 12 |
| 2011 | 41,824 | 0.8% | 12 of 12 |
| 2012 | 50,864 | Not reported | 12 of 12 |
| 2013 | 66,039 | 1.3% | 12 of 12 |
| 2014 | 35,962 | 0.7% | 12 of 12 |
| 2015 | 25,521 | 0.5% | 12 of 12 |
| 2016 | 36,237 | 0.7% | 12 of 12 |
| 2017 | 13,290 | 0.3% | 12 of 12 |
| 2018 | 43,118 | 0.9% | 12 of 12 |
| 2019 | 19,721 | 0.4% | 12 of 12 |
| 2020 | 47,051 | 0.9% | 12 of 12 |
| 2021 | 36,121 | 0.7% | 12 of 12 |
| 2022 | 29,653 | 0.6% | 12 of 12 |
| 2023 | 15,889 | 0.3% | 12 of 12 |
| 2024 | 21,293 | 0.4% | 12 of 12 |
| 2025 | 38,677 | 0.8% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 · NYISOEmissions
Free · EPA CAMPDCO₂, 2025
47,733
US short tons. 2024: 27,832
SO₂, 2025
0
US short tons
NOx, 2025
72
US short tons
CO₂ per MWh, calculated
1.23 t
About 2,468 lb per MWh
20 of 20 EPA units reported CO₂ in 2025 (U00001, U00002, U00003, U00004, U00005, U00006, U00007, U00008, and others), matched to EIA plant 8007 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
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 |
|---|---|---|---|
| 1 | Petroleum Liquids | 56.7 | July 1974 |
| 2 | Petroleum Liquids | 56.7 | July 1974 |
| 3 | Petroleum Liquids | 56.7 | July 1974 |
| 4 | Petroleum Liquids | 56.7 | July 1974 |
| 5 | Petroleum Liquids | 56.7 | July 1974 |
| 6 | Petroleum Liquids | 56.7 | July 1975 |
| 7 | Petroleum Liquids | 56.7 | July 1975 |
| 8 | Petroleum Liquids | 56.7 | July 1975 |
| 9 | Petroleum Liquids | 56.7 | July 1975 |
| 10 | Petroleum Liquids | 56.7 | July 1975 |
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 National Grid Generation LLC 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 Holtsville
More plants operated by National Grid Generation LLC
Questions about Holtsville
How much power does Holtsville produce?
Holtsville reported 38,677 MWh (38.7 GWh) of net generation in 2025, a 0.8% capacity factor on 567 MW of nameplate capacity.
Where is Holtsville?
Holtsville is in Suffolk County, New York, at 40.8170, −73.0663. It is in the New York Independent System Operator balancing area (NYIS).
Who operates Holtsville?
EIA-860M for August 2026 lists National Grid Generation LLC as the operator (EIA operator ID 56505). The operator is not always the owner.
When did Holtsville start operating?
Its first generator began operating in July 1974, according to EIA-860M.
Does InfraMap have power prices for Holtsville?
Yes. InfraMap has NYISO day-ahead and real-time prices at 10 price nodes linked to Holtsville, 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
- NYISO 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