MM San Diego-Miramar — United States of America

MM San Diego-Miramar is a 6.4 MW waste power plant in California, United States of America. It is operated by MM San Diego Energy-Miramar. Based on reported annual generation of 49 GWh, it can supply roughly 14k homes. It ranks #6308 of 10,884 United States of America power plants by installed capacity. Commissioned in 1997, it is around 29 years old — long-established. In context, the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0055094.

Data provenance

Source of the capacity and fuel values:

capacity: Wikidata P2109; fuel: WRI GPPD

In context: how this plant compares

At 6.4 MW, MM San Diego-Miramar is around the median waste plant in United States of America (6.6 MW). Waste-to-energy plants burn municipal solid waste to generate electricity and heat, cutting landfill volume while recovering energy from residual waste.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Load factor

87%, from 49 GWh of reported generation; the median for 506 waste plants in United States of America that report generation is 62%

Generation trend

47 GWh in 2013 and 49 GWh in 2019 (+3%)

Highest and lowest year

2017: 51 GWh; 2014: 46 GWh

Share of United States of America waste capacity

less than 0.1% of 10,154 MW across 551 plants in this dataset

Age among peers

180 of 541 dated waste plants in United States of America are older

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Reported generation trend

Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).

Owner

Operated by MM San Diego Energy-Miramar.

Local climate & thermal context

This waste plant recovers energy by combusting municipal or industrial waste. It sits in a cold semi-arid steppe climate (Köppen BSk) — Northern Hemisphere, latitude 32.8°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 79% 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: 21/100 — 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 benign, low-corrosion environment (estimated ISO 9223 class C1 — Very low), with dust abrasion 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 #295 largest waste power plant of 551 in United States of America by capacity.

United States of America has 551 waste power plants in this dataset, together about 10,154 MW of capacity.

Nearby power plants

• Kyocera America Project · Gas · 3.8 MW · California
• Miramar Energy Facility · Gas · 106 MW · California
• Illumina Way SD · Gas · 3.5 MW · California
• North City - Landfill Gas Engine North · Waste · 1.6 MW · California
• North City - Landfill Gas Engines South · Waste · 3.6 MW · California
• Childrens Hospital · Oil · 11.3 MW · California

Location

Coordinates 32.8448, -117.1627 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions