The Influence of Sewage System on the Functioning and Quality of Krakow’s Watercourses

Table 1

Levels of pH, oxidizing-reducing potential Eh, and electrolytic conductivity EC of the sediments collected in the Wilga, Prądnik, and at Wola Justowska (park—the reference area).

Sample symbol	pH level	Eh [mV]	EC mS/cm	Cd		Pb
				mg/kg
				0.18–0.063	<0.063	0.18–0.063	<0.063
				mm
Wilga catchment area
1W	5.43	−85	1.99	3	8	38	107
2W	6.67	−165	1.36	3	7	45	104
3W	6.76	−235	1.00	4	6	40	117
4W	7.9	−88	1.67	no fraction	10	no fraction	93
5W	7.95	−120	1.71	2	5	28	68
6W	6.68	−132	1.09	3	7	15	107
7W	6.28	−262	1.04	5	7	88	114
8W	6.68	−205	1.73	3	6	50	111
9W	6.83	−150	1.90	2	5	53	102
10W	7.61	−76	1.37	3	2	7	24
11W	6.14	−113	1.63	2	4	20	75
12W	6.49	−290	2.00	4	7	59	105
13W	7.78	−75	0.49	2	5	36	77
14W	6.27	−140	1.68	3	7	24	89
Prądnik catchment area
1P	10.21	−3	1.09	5	7	59	116
2P	9.08	−110	0.49	8	8	126	191
3P	7.60	−14	1.45	10	10	72	57
4P	8.20	−287	1.83	7	6	120	133
5P	—	—	8.60	8	6	145	73
6P	6.82	−165	6.29	5	6	91	104
7P	6.23	341	0.58	7	2	85	31
8P	7.48	−91	—	3	4	45	63
9P	6.28	−169	9.10	4	4	55	54
10P	5.93	130	5.93	4	3	77	53
11P	7.61	82	—	2	4	52	147
12P	7.64	−153	0.87	10	5	161	79
Wola Justowska area
1R	7.14	−130	1.87	3	3	61	58
2R	7.84	177	0.89	5	6	116	135
3R	7.53	62	0.51	4	4	78	129
4R	7.57	−172	1.03	3	5	41	114
5R	8.24	131	0.35	4	3	53	80
6R	7.31	−211	0.43	5	5	72	100