Indicator Data 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
Annual number of drinking water quality tests within
regulation [nr / year] 802 775 824 833 835
Annual number of drinking
water quality tests [nr / year] 806 780 831 839 844
Drinking water quality tests within regulation
Drinking water quality tests
within regulation [%] 99.50 99.36 99.16 99.28 98.93
Annual oxygen consumption
[tonnes O2 / year] 58840 51500 32100 28300 25700 27000 27000 22850 24900 21900
Population connected to the
wastewater system [nr] 889063 896075 903465 913499 922944 935000 947647 954860 961334 965800 Oxygen Consumption Potential Oxygen Consumption Potential [kg O2 / (p, yr)] 66.18 57.47 35.53 30.98 27.85 28.88 28.49 23.93 25.90 22.68
Annual content of mercury in discharged sludge (Henriksdal)
[mg / kg of dry matter] 2.20 2.20 1.80 1.70 1.50 1.50
Annual content of mercury in discharged sludge (Bromma)
[mg / kg of dry matter] 1.20 1.10 1.00 0.90 0.90 1.10
Annual content of mercury in discharged sludge (Loudden)
[mg / kg of dry matter] 1.20 1.00 1.10 0.90 0.90 0.90
Annual content of cadmium in discharged sludge (Henriksdal)
[mg / kg of dry matter] 1.80 1.70 1.50 1.40 1.20 1.20
Annual content of cadmium in discharged sludge (Bromma)
[mg / kg of dry matter] 1.40 1.20 1.10 1.00 1.00 0.90
Annual content of cadmium in discharged sludge (Loudden)
[mg / kg of dry matter] 1.40 1.30 1.20 1.30 1.10 0.90
Annual content of lead in discharged sludge (Henriksdal)
[mg / kg of dry matter] 48.00 50.00 46.00 44.00 39.00 32.00
Annual content of lead in discharged sludge (Bromma) Sludge
Indicator Data 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
Annual limit of content of mercury in discharged sludge
[mg / kg of dry matter] 2.5 2.5 2.5 2.5 2.5 2.5
Annual limit of content of cadmium in discharged sludge
[mg / kg of dry matter] 2 2 2 2 2 2
Annual limit of content of lead in discharged sludge [mg / kg of dry matter] 100 100 100 100 100 100 Content of Hg in discharged sludge (Henriksdal) [%] 88.00 88.00 72.00 68.00 60.00 60.00 Content of Hg in discharged sludge (Bromma) [%] 48.00 44.00 40.00 36.00 36.00 44.00 Content of Hg in discharged sludge (Loudden) [%] 48.00 40.00 44.00 36.00 36.00 36.00 Content of Cd in discharged sludge (Henriksdal) [%] 90.00 85.00 75.00 70.00 60.00 60.00 Content of Cd in discharged sludge (Bromma) [%] 70.00 60.00 55.00 50.00 50.00 45.00 Content of Cd in discharged sludge (Loudden) [%] 70.00 65.00 60.00 65.00 55.00 45.00 Content of Pb in discharged sludge (Henriksdal) [%] 48.00 50.00 46.00 44.00 39.00 32.00 Content of Pb in discharged sludge (Bromma) [%] 38.00 40.00 44.00 34.00 32.00 24.00 Sludge quality Content of Pb in discharged sludge (Loudden) [%] 36.00 38.00 35.00 36.00 31.00 26.00
Annual amount of sludge re-used in agriculture [tonnes /
year] 4000 5259 3000
Annual production of sludge
[tonnes / year] 73800 71538 69370 Percentage of sludge re-used
Percentage of sludge re-used
Indicator Data 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
Annual use of energy for wastewater treatment [GWh /
yr] 112.5 111.0 115.3 112.7 105.5
Total removal of nitrogen
[tonnes / yr] 2991.00 3304.00 3505.00 3490.00 3583.02 Energy use for wastewater treatment
Energy use for wastewater
treatment [kWh / kg N] 3.76E-02 3.36E-02 3.29E-02 3.23E-02 2.94E-02
Annual use of energy for water
supply [GWh / yr] 43.4 45.8 45.5 46.6 47.2 46.6
Annual volume of supplied
water (distributed) [Mm3 / year] 121.9 127.9 128.4 131.0 133.1 131.3
Energy use for water supply
Energy use for water supply
[kWh / m3] 0.3560 0.3581 0.3544 0.3557 0.3546 0.3549
Annual use of electricity and
fossil fuel [GWh / yr] 106.1 103.7 104.8 107.8 108.1 109.2 108.8 109.8
Total use of energy per year
[GWh / yr] 157.1 146.5 145.8 158.3 156.5 161.9 159.9 152.1
Use of electricity and fossil fuel
Use of electricity and fossil
fuel [%] 67.54 70.78 71.88 68.10 69.07 67.45 68.04 72.19
Annual energy recovered by
production of biogas [GWh / yr] 65.00 58.50 61.80 67.60 77.40 78.20 80.10 84.40
Population connected to the
wastewater system [nr] 903465 913499 922944 935000 947647 954860 961334 965800
Energy recovered
Annual energy recovered by production of biogas [kWh /
(p, yr)] 7.195E-02 6.404E-02 6.696E-02 7.230E-02 8.168E-02 8.190E-02 8.332E-02 8.739E-02
Annual costs [MKr / yr] 921.6 925.4 952.2 963.6 957.4 996.7 1014.9
Population connected to the
drinking water system [nr] 1060200 1071600 1083500 1106100 1131000 1140200 1148400
Consumer Price Index (1980 = Costs per
person
Indicator Data 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
Annual volume of supplied
water (sold) [Mm3 / yr] 108.70 107.70 108.20 108.70 106.20 107.90 109.40 110.90 112.20 111.30
Total population [nr] 1028300 1039300 1048200 1060200 1071600 1083500 1106100 1131000 1140200 1148400 Consumption of water Consumption of water [litres/(p, day)] 293.63 287.85 286.73 284.80 275.29 276.62 274.74 272.37 273.34 269.22
Annual number of service
complaints [nr / yr] 1090 1015 1191 1094 862 781 737 697 534 604
Population connected to the
system [nr] 1028300 1039300 1048200 1060200 1071600 1083500 1106100 1131000 1140200 1148400
Service complaints
Service complaints [number /
(p, yr)] 1.06E-03 9.77E-04 1.14E-03 1.03E-03 8.04E-04 7.21E-04 6.66E-04 6.16E-04 4.68E-04 5.26E-04
Number of employees [nr] 646 630 615 638 645 612 598 573 571 587
Population connected to the
system [nr] 1028300 1039300 1048200 1060200 1071600 1083500 1106100 1131000 1140200 1148400 Number of employees Number of employees
[number / p] 6.28E-04 6.06E-04 5.87E-04 6.02E-04 6.02E-04 5.65E-04 5.41E-04 5.07E-04 5.01E-04 5.11E-04
Service
interruptions Hours without water [h / yr] 142033 44600 340000 210203 165499 105000 788451 574578 153732 118597
Population connected to the
system [nr] 1028300 1039300 1048200 1060200 1071600 1083500 1106100 1131000 1140200 1148400
Drinking water system
interruptions [h / (p, yr)] 1.38E-01 4.29E-02 3.24E-01 1.98E-01 1.54E-01 9.69E-02 7.13E-01 5.08E-01 1.35E-01 1.03E-01
Annual number of stops in the
wastewater activity [nr, yr] 761 646 658 645 524 421 406 382 318 371
Population connected to the
wastewater system [nr] 889063 896075 903465 913499 922944 935000 947647 954860 961334 965800
Wastewater activity
interruptions [Number/ (p,
