130
A. Solarczyk
Table 6.3 Average (median) concentrations of selected physico-chemical indicators of
contamination in the catchments and subcatchments of the Oder in 2010–2015 (own calculations
based on data of Voivodeship Inspectorates for Environmental Protection)
SEC
(20 °C)
Hardness
BOD 5
TOC
TN
TP
No. Catchments/subcatchments µS/cm mgCaCO 3 /L mgO 2 /L mgC/L mgP/L mgN/L
52 Upper Oder and Olza 1
672
233
3.0
6.7
3.75
0.179
53 Kłodnica
2,087
390
4.0
10.0
5.24
0.280
54 Mała Panew
362
183
2.2
8.2
3.90
0.135
55 Stobrawa
362
152
2.7
10.5
2.65
0.180
56 Widawa
628
322
2.6
8.2
3.83
0.180
57 Nysa Kłodzka
280
132
2.1
3.9
2.74
0.158
58 Oława
689
298
2.8
5.6
3.15
0.140
59 ´
Sl˛ e˙ za
1,105
381
3.3
7.8
4.05
0.425
60 Bystrzyca
451
207
2.8
6.0
3.66
0.215
61 Kaczawa
483
214
2.5
6.1
3.71
0.124
62 Barycz
545
267
3.9
11.7
3.57
0.255
63 Obrzyca
588
250
2.9
9.0
1.82
0.188
64 Small right tributaries of
the middle Oder 1
531
254
2.7
9.3
2.08
0.130
65 Small left tributaries of the
middle Oder 1
583
272
2.4
7.6
2.90
0.153
66 Bóbr
239
90
2.7
4.5
2.32
0.125
67 Nysa Łu˙ zycka
393
164
2.7
6.0
2.5
0.162
68 Pliszka
345
200
2.5
19.5
0.73
0.140
69 Liswarta
331
145
1.6
9.4
3.79
0.130
70 Widawka
466
199
2.3
10.5
3.37
0.145
71 Ner
529
266
3.7
10.5
5.00
0.260
72 Prosna
485
230
3.2
8.7
5.17
0.216
73 Small tributaries of the
upper Warta (to the
Prosna) 1
605
277
2.7
12.0
4.00
0.197
74 Obra Canal
918
423
3.5
13.7
10.1
0.255
75 Wełna
626
328
3.2
12.5
4.45
0.226
76 Obra
505
245
2.9
12.7
2.18
0.210
77 Small tributaries of the
middle Warta (to the
Note´ c) 1
832
362
4.3
13.0
5.85
0.296
78 Upper Note´ c
(to the Bydgoszcz Canal) 1
1,106
470
3.3
10.3
3.26
0.245
79 Gwda
295
173
2.1
6.8
2.02
0.140
(continued)