| Pollution load of discharged wastewater with total phosphorus, tons | | 230 | 192 | 183 | 175 | 170 | 146 | 146 | 138 | 146 | 146 | 114 | 110 | 100 | 66 | 59 | 55 | 59 | 58 |
| Pollution load of discharged wastewater with total nitrogen, tons | | 2 810 | 3 148 | 2 591 | 2 348 | 2 241 | 1 771 | 1 621 | 1 646 | 1 859 | 1 751 | 1 770 | 1 890 | 1 612 | 1 228 | 1 138 | 1 029 | 1 221 | 1 306 |
| Pollution load of organic substances (BOD7) of discharged wastewater, tons | | 2 051 | 1 674 | 1 480 | 1 657 | 1 562 | 1 399 | 1 366 | 1 160 | 1 199 | 1 137 | 1 214 | 937 | 720 | 814 | 663 | 670 | 842 | 1 051 |
| Share of non-purified or mechanically purified wastewater discharge in wastewater needing purification, % | | 57 | 60 | 60 | 63 | 66 | 65 | 61 | 64 | 70 | 71 | 69 | 69 | 67 | 64 | 64 | 62 | 61 | 65 |
| Nitrogen carried into the soil with fertilizers per treated hectare, kg | | 32 | 30 | 36 | 35 | 43 | 33 | 34 | 40 | 50 | 40 | 42 | 44 | .. | .. | .. | .. | .. | .. |