Ubombo Mill is a 13 MW biomass power plant in Lubombo, Swaziland. Based on its capacity (estimated), it can supply roughly 18k homes (estimated). It ranks #6 of 6 Swaziland power plants by installed capacity. In context, biomass supplies about 34.4% of Swaziland's electricity; the national grid averages 131 gCO₂/kWh (96.7% low-carbon) (2024).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1023191.
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
Biomass plants burn organic material such as wood, residues or waste-derived fuel to raise steam; they are dispatchable and counted as low-carbon where the feedstock is sustainably sourced.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Key facts
- Share of Swaziland biomass capacity
- 29.5% of 44 MW across 3 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 biomass plants in Swaziland
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Local climate & thermal context
This biomass plant burns organic material (wood, residues) to raise steam for a turbine. It sits in a humid subtropical climate (Köppen Cfa) — Southern Hemisphere, latitude 26.8°S — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 98% below 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: 14/100 — this site sits in the bottom 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 corrosive environment (estimated ISO 9223 class C4 — High), 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 #3 largest biomass power plant of 3 in Swaziland by capacity.
Swaziland has 3 biomass power plants in this dataset, together about 44 MW of capacity.
Nearby power plants
- Lubhuku power station · Coal · 300 MW · Eswatini
- Mpaka power station · Coal · 500 MW · Eswatini
- Edwaleni · Hydro · 15 MW · Manzini
- Simunye Mill · Biomass · 17 MW · Lubombo
- Edwaleni power station · Gas · 250 MW · Edwaleni
- Mhlume Mill · Biomass · 14 MW · Lubombo
Location
Coordinates -26.7729, 31.9416 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Ubombo Mill?
Ubombo Mill is a 13 MW biomass power plant in Lubombo, Swaziland.