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Table 3 Description of pollution discharged into the air by industrial plants in Spain (2001), by specific pollutant.

From: Description of industrial pollution in Spain

POLLUTANTS TOTAL SPAIN AUTONOMOUS REGIONS WITH HIGHEST EMISSIONS
SUBSTANCES THRESHOLD (Mt/year)1 EMISSION (Mt/year)2 PLANTS3 MEAN EMISSION PER PLANT (Mt/year)4 REGION EMISSION (Mt/year)2 PLANTS3 MEAN EMISSION PER PLANT (Mt/year)4
GROUP 1: ENVIRONMENTAL THEMES
Methane 100 78670 58 1356 Aragon 19048 6 3175
Carbon monoxide 500 243834 56 4354 Asturias 119754 5 23951
Carbon dioxide 100000 155211000 153 1014451 Asturias 23823000 13 1832538
Hydrofluorocarbons 0.1 276 5 55 Catalonia 193 4 48
Nitrous oxide 10 6208 37 168 Castile-La Mancha 1494 6 249
Ammonia 10 24049 815 30 Aragon 10015 399 25
Non-methane volatile organic compounds 100 63781 60 1063 Andalusia 16810 7 2401
Nitrogen dioxide 100 801301 217 3693 Catalonia 394548 33 11956
Perfluorocarbons 0.1 30 4 8 Galicia 18 2 9
Sulphur dioxide 150 1156625 156 7414 Galicia 412414 12 34368
GROUP 2: METALS AND COMPOUNDS
Arsenic 0.02 6 33 0.17 Andalusia 2 8 0.20
Cadmium 0.01 5 46 0.11 Basque Country 1 13 0.10
Chromium 0.10 80 40 2 Basque Country 44 11 4
Copper 0.10 29 28 1 Andalusia 15 6 2
Mercury 0.01 3 34 0.08 Catalonia 0.5 8 0.06
Nickel 0.05 171 96 2 Andalusia 42 18 2
Lead 0.20 100 50 2 Basque Country 53 14 4
Zinc 0.20 655 43 15 Basque Country 368 15 25
GROUP 3: CHLORINATED ORGANIC SUBSTANCES
Dichloroethane-1,2 1 3 1 3 Catalonia 3 1 3
Dichloromethane 1 61 4 15 Madrid Region 29 1 29
Hexachlorobenzene 0.01 0.03 2 0.02 Extremadura 0.02 1 0.02
Dioxins and furans 0.000001 0.0002 11 0.00002 Basque Country 0.0001 2 0.00005
Tetrachloroethylene 2 72 1 72 Basque Country 72 1 72
Tetrachloromethane 0.10 0.50 1 0.50 Catalonia 0.50 1 0.50
Trichloroethylene 2 81 3 27 Castile & Leon 62 1 62
Trichloromethane 0.50 23 2 12 Andalusia 18 1 18
GROUP 4: OTHER ORGANIC COMPOUNDS
Benzene 1 197 20 10 Andalusia 97 5 19
Polyciclic aromatic hydrocarbons 0.05 21 16 1 Andalusia 12 3 4
GROUP 5: OTHER COMPOUNDS
Chlorine and inorganic compounds 10 2217 44 50 Andalusia 1582 13 122
Fluorine and inorganic compounds 5 2091 35 60 Andalusia 1122 15 75
HCN 0.2 4 6 0.6 Basque Country 4 6 0.6
PM10 50 43575 119 366 Castile & Leon 11547 10 1155
  1. 1 Established air emission threshold or limit value (in Mt/year) for each pollutant. Should any plant exceed this threshold, it must report the release of the pollutant (voluntarily)
  2. 2 Amount of pollutant (in Mt/year) released by industrial plants
  3. 3 Number of industrial plants that discharge said pollutant
  4. 4 Mean emission = Emission/Plants