Statistics Norway

Municipal waste water treatment. Discharges, treatment efficiencies and sludge disposal

3   Discharges of nitrogen, by county and treatment methods. 2002. Tonnes
County/region Total1 Direct discharges Mechanical Chemical Biological Chemical-biological Other treatment Individual treatment plants (<50 P.E) Discharges per inhabitant. Kilograms1 Average treatment efficiency. Per cent1
Total 1998 13 554.0                  
Total 1999 13 492.0                  
Total 2000 13 191.4 1 478.0     3 823.8    4 921.3     126.2   2 685.8  156.2   2.95 27.71
Total 2001 12 302.9 1 384.2 3 021.7 5 145.7  247.2 2 199.6  304.4 3 560.1 2.73 28.29
Total 2002 11 785.3 1 284.3 2 979.1 5 133.8  279.8 1 925.3  182.9 3 246.1 2.61 29.01
                     
North Sea counties (1-10) 6 246.2 73.4  117.2 4 025.3  125.0 1 788.5  116.7 1 361.9 2.50 38.65
Rest of the counties (11-20) 5 539.1 1 210.9 2 861.9 1 108.5  154.8  136.8 66.2 1 884.1 2.73 13.73
                     
Østfold  760.1 0.0 0.0  709.1 0.7 49.6 0.7  109.3 3.01 19.64
Akershus og Oslo 1 918.3 23.9 0.0  742.1 0.0 1 152.0 0.3  196.3 1.94 59.20
Hedmark  510.4 0.0 0.0  254.9 0.0  237.9 17.6  224.8 2.72 26.38
Oppland  431.5 0.0 14.5  220.7 3.5  188.8 3.9  243.9 2.35 38.02
Buskerud  596.3 0.0 0.6  510.5 0.0 82.8 2.4  173.6 2.49 19.65
Vestfold  774.2 0.0 3.5  650.6 0.6 31.1 88.4  111.6 3.58 17.93
Telemark  460.6 0.0 0.0  428.4 14.3 15.8 2.1  132.1 2.78 13.46
Aust-Agder  291.2 0.0 34.4  168.3 65.6 22.5 0.3 87.8 2.83 19.77
Vest-Agder  503.7 49.5 64.1  340.8 40.3 7.9 1.1 82.4 3.19 10.84
Rogaland 1 000.5  109.3  239.6  552.9 87.5 4.2 7.0  228.4 2.62 17.19
Hordaland 1 198.2  101.4  852.0  189.2 13.5 34.2 8.0  328.9 2.73 15.16
Sogn og Fjordane  238.7 40.1  181.8 0.5 8.4 6.9 1.1  164.5 2.23 13.37
Møre og Romsdal  801.2  290.2  445.6 42.0 0.3 3.5 19.6  273.4 3.29 10.60
Sør-Trøndelag  698.4 35.2  419.5  180.3 14.5 41.6 7.3  198.1 2.62 16.54
Nord-Trøndelag  276.3 8.5 80.9  135.0 20.3 26.1 5.6  140.5 2.17 18.61
Nordland  547.0  222.1  306.1 2.8 8.3 2.6 5.2  312.6 2.30 9.80
Troms  514.2  209.8  280.1 4.9 1.1 8.2 10.2  182.6 3.39 9.30
Finnmark Finnmárku  264.4  194.4 56.4 0.8 1.0 9.5 2.3 55.2 3.59 5.00
1  Discharges from small treatment plants are not included.

Explanation of symbols