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

3   Discharges of nitrogen by county and treatment methods. 2001. Tons
County/region Total1 Direct discharges Mechanical Chemical Biological Chemical-biological Other treatment Individual treatment plants (<50 PE) Discharges per inhabitant, Kilograms1 Average treatment efficiency1
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
Nordsjøfylkene (1-10) 6 685.0 79.0  212.8 4 040.8 93.3 2 064.2  194.9 1 563.6 2.69 37.17
Resten av landet (11-20) 5 617.9 1 305.3 2 808.9 1 104.9  153.8  135.5  109.5 1 996.6 2.78 13.79
1. Østfold  914.3 0.0 0.0  847.4 0.0 66.2 0.6  120.5 3.64 12.97
2-3. Akershus og Oslo 2 161.5 1.4 1.7  798.9 - 1 359.5 -  243.2 2.20 55.62
4. Hedmark  507.0 - -  180.6 2.5  306.5 17.4  262.4 2.70 22.53
5. Oppland  430.0 - -  232.6 2.7  191.8 2.9  258.2 2.34 34.59
6. Buskerud  692.8 - 0.6  592.2 2.0 66.4 31.6  179.2 2.90 22.14
7. Vestfold  725.6 - 0.5  603.5 0.0 33.3 88.2  165.9 3.37 17.58
8. Telemark  453.7 - 0.0  421.4 19.9 10.2 1.9  162.3 2.74 20.12
9. Aust-Agder  290.8 -  135.8 52.2 29.7 21.7 51.4 87.2 2.83 22.32
10. Vest-Agder  509.4 77.5 73.8  312.1 36.4 8.5 1.1 84.5 3.25 26.61
11. Rogaland 1 131.4  112.2  327.6  552.7 87.5 4.2 47.2  297.8 3.02 16.96
12. Hordaland 1 157.2 62.6  851.9  189.2 11.7 37.7 4.0  419.1 2.64 15.62
14. Sogn og Fjordane  240.2 42.2  177.3 0.7 6.6 7.2 6.1  172.2 2.23 14.34
15. Møre og Romsdal  732.7  324.2  338.2 42.4 0.0 3.9 23.8  254.5 3.01 9.57
16. Sør-Trøndelag  705.3 39.9  422.7  178.7 14.8 43.0 6.2  184.7 2.66 16.45
17. Nord-Trøndelag  337.2 27.2  142.3  126.5 23.7 14.2 3.4  154.6 2.65 16.83
18. Nordland  609.8  265.3  323.8 2.8 6.4 3.2 8.3  303.1 2.56 10.77
19. Troms  443.6  224.0  183.8 11.1 2.7 11.9 10.1  145.2 2.92 8.72
20. Finnmark  260.5  207.7 41.2 0.9 0.0 10.1 0.0 65.3 3.52 4.57
1  Discharges from small treatment plants are not included.

Explanation of symbols