Harjavalta is a 6.3 MW oil power plant in Satakunta, Finland. It is operated by Suomen Teollisuuden Energiapalvelut - STEP Oy. Based on its capacity (estimated), it can supply roughly 4.7k homes (estimated). It ranks #144 of 203 Finland power plants by installed capacity. Its annual emissions of 13,993 t CO₂/yr (EU ETS verified (EUTL 2023)) are equivalent to about 3.3k cars driven for a year. In context, oil supplies about 2.3% of Finland's electricity; the national grid averages 57 gCO₂/kWh (96.3% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002330.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.
capacity: WRI GPPD; fuel: WRI GPPD
In context: how this plant compares
At 6.3 MW, Harjavalta is below the median oil plant in Finland (52 MW). Oil-fired plants burn heavy fuel oil or diesel, usually as peaking or backup capacity on islands and grids without gas pipelines; high fuel cost keeps their utilisation low.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
13,993 t CO₂/yr — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per EU ETS verified (EUTL 2023) (measured for US EPA/EU ETS, modelled for Climate TRACE).
Key facts
- Share of Finland oil capacity
- 0.4% of 1,442 MW across 17 plants in this dataset
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest oil plants in Finland
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Suomen Teollisuuden Energiapalvelut - STEP Oy.
Local climate & thermal context
This oil plant burns oil or diesel to drive turbines or reciprocating engines. It sits in a warm-summer humid continental climate (Köppen Dfb) — Northern Hemisphere, latitude 61.3°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 101% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 94/100 — this site sits in the top third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #16 largest oil power plant of 17 in Finland by capacity.
Finland has 17 oil power plants in this dataset, together about 1,442 MW of capacity.
Nearby power plants
- Harjavalta · Hydro · 72 MW · Satakunta
- Kolsi · Hydro · 45 MW · Satakunta
- Kauttua · Biomass · 19 MW · Satakunta
- Pori · Biomass · 81.4 MW · Satakunta
- Tahkoluoto Offshore tv · Wind · 2.3 MW · Satakunta
- Tahkoluoto tv · Wind · 3 MW · Satakunta
Location
Coordinates 61.3167, 22.1333 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Harjavalta?
Harjavalta is a 6.3 MW oil power plant in Satakunta, Finland.
Who operates Harjavalta?
Harjavalta is operated by Suomen Teollisuuden Energiapalvelut - STEP Oy.
How much CO₂ does Harjavalta emit?
Harjavalta has measured emissions of about 13,993 tonnes of CO₂ per year (EU ETS verified (EUTL 2023)).