Power-plant climate severity and ISO 9223 context

Severity distribution

Class	Meaning	Plants	MW	CO2 t/yr
C1	Very low	6,054	1,676,909	1,356,850,080
C2	Low	10,826	2,199,144	1,832,499,167
C3	Medium	13,787	3,108,543	2,048,574,441
C4	High	7,681	1,883,470	1,297,688,880
C5	Very high	3,321	1,672,431	968,206,440
CX	Extreme	354	120,892	12,020,723

Climate and corrosivity layer: Koppen-Geiger / WorldClim-derived site context; plant backbone: WRI GPPD and Global Energy Monitor.

Highest-severity indexed examples

Plant	Country	Fuel	Severity
Az Zour North	Kuwait	Gas	73
Az Zour South CCGT	Kuwait	Gas	73
Al Khafji	Saudi Arabia	Solar	73
RAS AL-KHAFJI ARAMCO	Saudi Arabia	Other	73
Al-Nuwaiseeb power plant	Kuwait	Gas	73
Khursaniyah	Saudi Arabia	Gas	72
Fadhili cogeneration power plant	Saudi Arabia	Gas	72
Karan Gas power plant	Saudi Arabia	Gas	72
Alkhobar	Saudi Arabia	Oil	71
Hajr for Electricity Production Co. Station	Saudi Arabia	Gas	71
QURAYYAH -STEAM	Saudi Arabia	Gas	71
QURAYYAH- CC	Saudi Arabia	Gas	71
Qurayyah Thermal power plant	Saudi Arabia	Gas	71
Al-Nouf Power Plant	United Arab Emirates	Gas	71
TAPCO	United Arab Emirates	Gas	70
Taweelah A1	United Arab Emirates	Gas	70
Taweelah A2	United Arab Emirates	Gas	70
Emirates Aluminum Smelter Complex power station	United Arab Emirates	Gas	70
Al Hamra Independent Power Plant	United Arab Emirates	Gas	70
Tonbak LNG power station	Iran	Gas	70

Frequently asked questions

What does ISO 9223 mean here?

ISO 9223 is an atmospheric-corrosivity classification. PowerAtlas uses it as a site-severity context layer, not as a substitute for a plant inspection.

Is climate severity an emissions metric?

No. It describes outdoor corrosivity and operating environment. Emissions remain separately labelled as measured, modelled, calculated or unavailable.

Why does this matter for power plants?

Hot equipment in severe coastal, humid or polluted environments faces a different maintenance context than comparable equipment in benign inland climates.