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

1   Number of municipal treatment plants. By county. 2001
County/region Total1 Direct discharges Mechanical Biological Chemical Chemical-biological Other treatment Small treatment plants (<50 PE)
Total 2001 2 639  700  976  125  256  299  283  336 321
North Sea counties (1-10)  652 15 37 30  211  227  132  163 746
Rest of the counties (11-20) 1 987  685  939 95 45 72  151  172 575
1. Østfold 46 6 2 2 14 18 4 12 496
2-3. Akershus og Oslo 49 2 2 - 27 17 1 23 272
4. Hedmark 86 - - 3 30 36 17 32 055
5. Oppland  164 - 2 2 22 74 64 29 884
6. Buskerud 98 - 1 1 44 23 29 20 365
7. Vestfold 40 - 2 1 14 19 4 13 908
8. Telemark 61 - 2 13 29 12 5 14 957
9. Aust-Agder 43 - 9 1 14 15 4 9 352
10. Vest-Agder 65 7 17 7 17 13 4 7 457
11. Rogaland  204 23  135 7 11 4 24 16 816
12. Hordaland  354 39  268 22 1 14 10 36 366
14. Sogn og Fjordane  206 41  133 8 3 6 15 16 322
15. Møre og Romsdal  464  260  154 1 3 6 40 21 365
16. Sør-Trøndelag  102 11 37 19 7 14 14 18 184
17. Nord-Trøndelag  129 24 41 21 12 17 14 13 969
18. Nordland  284  143  100 10 2 3 26 28 608
19. Troms  125 61 46 6 4 3 5 15 114
20. Finnmark  119 83 25 1 2 5 3 5 831
1  Small treatment plants are not included.

Explanation of symbols