Air & Transportation

Regulatory Measures against Air Pollutants Emitted from Factories and Business Sites and the Outline of Regulation - K-value Regulation for Sulfur Oxides

K-value Regulation for Sulfur Oxides

q = K × 10-3 × He2

Where,
q: permissible emission volume of sulfur oxides (Nm3/hr)
K: constant specified for each area (16 values ranging from 3.0 to 17.5)
He: effective stack height in meters (actual stack height plus height of smoke ascent)

Emission standards

Emission standards

Special emission standards

Rank 1K-value 1.17 Special wards of Tokyo, Osaka/Sakai, Yokohama/Kawasaki, Kobe/Amagasaki, Yokkaichi, Nagoya (6 areas)
21.75 Chiba/Ichihara, Fuji, Handa/Hekinan, Kishiwada/Ikeda, Himeji, Wakayama/Kainan, Kurashiki(Mizushima), Kitakyushu (8 areas)
32.34 Kashima, Kawaguchi/Soka, Toyama/Takaoka, Shimizu, Kyoto, Fukuyama, Ohtake, ube, Tokuyama, Iwakuni, Marugame/Sakaide, Niihama, Ohmuta, Ohita (14 areas)
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