Protection of the environment
| 2016 | 2017 | 2016=100 | |
| Protection of the environment | |||
| Municipal waste water treatment plants | |||
| Waste water treated per year in million m3/year | 49,9 | 54,4 | 109,0 |
| Loads of pollutants in waste water after treatment in central sewage treatment plant in g O2/m3 | |||
| BZT5 | 4,2 | 3,3 | 78,6 |
| suspension | 8,1 | 8,1 | 100,0 |
| Industrial waste water treatment plants | |||
| Industrial waste water discharged in total in thousands dam3/year, of which: | 3,9 | n/a | x |
| waste water discharged to the sewerage network | 1,7 | n/a | x |
| waste water discharged directly into waters or into the ground | 2,2 | n/a | x |
| Pollutant loads in waste water discharged into waters or into the ground in t / year: | |||
| BOD5 | 7,5 | n/a | x |
| COD | 31,2 | n/a | x |
| total suspension | 19,5 | n/a | x |
| total chloride ions and sulphates | 454,3 | n/a | x |
| total nitrogen | 6,1 | n/a | x |
| total phosphorus | 0,4 | n/a | x |
| Sludge’s from industrial waste water treatment plants in thousand tonnes, of which: | 3,475 | n/a | x |
| thermally converted | 0,3 | n/a | x |
| Emissions of air pollutants from particularly burdensome plants | |||
| Dust emission, in total t / year, including: | 205,0 | n/a | x |
| from fuel combustion | 76,0 | n/a | x |
| Emissions of gaseous pollutants in thousand tonnes / year, of which: | 1507,9 | n/a | x |
| carbon dioxide | 1501,4 | n/a | x |
| without carbon dioxide, including: | 6,5 | n/a | x |
| sulphur dioxide | 1,0 | n/a | x |
| nitrogen oxides | 2,5 | n/a | x |
| carbon monoxide | 0,5 | n/a | x |
| Pollutants retained or neutralized in reduction devices in thousand tonnes / year: | |||
| dusts | 99,8 | n/a | x |
| gaseous | 27,6 | n/a | x |
| Wastes generated and accumulated | |||
| Total waste generated in thousand t / a year, including: | 599,6 | n/a | x |
| subjected to recovery | 3,7 | n/a | x |
| temporarily stored | 4,4 | n/a | x |
| The size of the municipal waste landfill in Suchy Las, in ha | 56,8 | 56,8 | 100,0 |
| Landfill use in % | 82,7 | 83,0 | x |
| The amount of solid waste sent to landfill in thousands t/year | 42,9 | 72,7 | 169,5 |
| Green areas | |||
| Number of parks | 46 | 47 | 102,2 |
| Parks area in ha | 345 | 344 | 99,9 |
| Number of green areas | 123 | 121 | 98,4 |
| Green areas in ha | 96 | 89 | 92,5 |
| Lawn areas in ha | 318 | 317 | 99,7 |
| Number of Family Allotment Gardens (ROD) | 86 | 85 | 98,8 |
| Number of allotment gardens in ROD in thousands | 18,4 | 17,8 | 96,8 |
| ROD area in ha | 802,0 | 781,7 | 97,5 |
| Area covered by cemeteries in ha | 22 | 22 | 100,0 |
| Number of cemeteries | 252 | 252 | 100,0 |
| Municipal forests area in ha | 2 561 | 2 564 | 100,1 |
| Number of visitors to zoo gardens in thousands | 372,0 | 385,0 | 103,5 |
| Area covered by zoo gardens in ha | 120,7 | 120,7 | 100,0 |
| Number of animals in zoo gardens | 2 302 | 2 384 | 103,6 |
| The number of visitors to the Poznan Palm House in thousands | 182,9 | 202,7 | 110,8 |
| Municipal cemeteries | |||
| Number of burial places in thousands | 132,5 | 128,3 | 96,9 |
| Number of buried dead people | 3 460 | 3 554 | 102,7 |
| Number of places for use | 4 320 | 3 622 | 87,1 |
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