Waste water, municipal. Treatment plants, -methods and -capacity

2   Number of people connected to different types of treatment plants, by county. 20001
County/region Direct discharges Mechanical Chemical Biological Chemical/biological Other treatment Separate treatment plants Proportion connected to the sewage system2
Total 293 771 981 717 1 317 401 38 533 923 651 25 477 892 796 80
North Sea counties (1-10) 6 150 99 300 1 032 280 19 298 899 199 11 044 403 152 84
Rest of the counties (11-20) 277 972 854 821 301 158 19 061 46 053 14 217 489 644 75
1. Østfold 0 20 199 723 111 12 258 177 35 050 86
2. Akershus 0 0 212 946 92 201 353 370 51 326 89
3. Oslo 0 0 0 0 507 467 0 1 578 100
4. Hedmark 0 0 51 598 488 68 023 3 844 75 145 66
5. Oppland 0 143 26 990 0 80 548 1 715 53 532 60
6. Buskerud 0 142 164 815 255 20 641 2 152 50 761 79
7. Vestfold 0 26 303 145 649 0 9 080 170 41 793 85
8. Telemark 0 783 117 717 4 891 3 628 314 34 133 77
9. Aust-Agder 0 44 086 14 037 13 269 4 262 973 23 419 75
10. Vest-Agder 6 199 30 442 84 700 559 3 205 1 128 36 415 81
11. Rogaland 6 741 116 244 185 124 1 381 441 1 808 45 594 84
12. Hordaland 27 762 238 610 44 133 1 495 11 429 708 110 555 74
14. Sogn og Fjordane 15 735 41 011 126 2 786 1 482 462 40 792 57
15. Møre og Romsdal 78 366 82 807 10 877 346 849 1 778 66 307 72
16. Sør-Trøndelag 9 237 129 293 53 940 2 406 13 389 1 786 51 180 80
17. Nord-Trøndelag 1 777 57 090 16 325 7 152 10 040 693 32 878 73
18. Nordland 35 711 130 284 847 4 318 880 667 72 617 72
19. Troms 39 015 53 874 2 206 498 5 678 3 054 55 365 69
20. Finnmark 41 977 13 153 57 0 3 032 2 401 14 358 82
1  The reported number of persons connected to the sewage system might differ slightly from the official population statistics.
2  The number of persons connected to separate treatment plants are not included.

Explanation of symbols