Table 4

Description of pollution directly discharged to water by industrial plants in Spain (2001), by specific pollutant.
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
Nitrogen
 50
 5255
 18
 292
 Andalusia
 1759
 4
 440
Phosphorus
 5
 535
 25
 21
 Aragon
 175
 3
 58









GROUP 2: METALS AND COMPOUNDS
Arsenic
 0.005
 0.412
 11
 0.037
 Catalonia
 0.161
 3
 0.054
Cadmium
 0.005
 2
 16
 0.106
 Andalusia
 1
 8
 0.133
Chromium
 0.050
 7
 24
 0.293
 Catalonia
 2
 7
 0.336
Copper
 0.050
 9
 28
 0.309
 Basque Country
 3
 5
 0.690
Mercury
 0.001
 0.281
 17
 0.017
 Cantabria
 0.102
 2
 0.051
Nickel
 0.020
 9
 33
 0.275
 Aragon
 3
 2
 2
Lead
 0.020
 3
 18
 0.187
 Andalusia
 1
 5
 0.208
Zinc
 0.100
 137
 37
 4
 Cantabria
 97
 6
 16









GROUP 3: CHLORINATED ORGANIC SUBSTANCES
Dichloroethane-1,2
 0.010
 0.332
 2
 0.166
 Catalonia
 0.308
 1
 0.308
Chloroalkanes
 0.001
 0.186
 2
 0.093
 Cantabria
 0.161
 1
 0.161
Hexachlorobutadiene
 0.001
 0.001
 1
 0.001
 Catalonia
 0.001
 1
 0.001
Halogenated organic compounds
 1
 319
 16
 20
 Andalusia
 100
 3
 33









GROUP 4: OTHER ORGANIC COMPOUNDS
Benzene, toluene, ethylbenzene, xylenes
 0.200
 64
 4
 16
 Cantabria
 47
 1
 47
Polycyclic aromatic hydrocarbons
 0.005
 7
 6
 1
 Cantabria
 5
 2
 2
Phenols
 0.020
 24
 17
 1
 Andalusia
 17
 4
 4
Total organic carbon
 50
 31375
 55
 570
 Cantabria
 11878
 6
 1980









GROUP 5: OTHER COMPOUNDS
Chlorides
 2000
 7696120
 11
 699647
 Basque Country
 6517950
 3
 2172650
Cyanides
 0.050
 153
 5
 31
 Asturias
 151
 1
 151
Fluorides
 2
 149
 15
 10
 Asturias
 60
 2
 30

García-Pérez et al. BMC Public Health 2007 7:40   doi:10.1186/1471-2458-7-40