Table 3.

The average values (in bold) and minimum–maximum of selected parameters of rivers water quality

Parameters	Rivers
	Kamienny Bród	Piecówka	Rospuda	Netta	Czarna Hańcza
Fungi abundance (CFU/mL)	21,975	22,250	19,000	11,450	9175
	18,800–24,800	19,800–24,200	17,200–20,500	10,000–12,200	8200–10,200
Chlorophyll a (µg/dm3)	7.48	1.71	5.33	3.14	13.8
	3.96–10.5	1.46–2.00	4.91–6.00	2.28–4.60	11.9–17.0
EC (μS/cm)	600	425	460	419	390
	512–679	393–460	416–499	382–500	311–462
pH	7.74	7.58	7.57	7.81	7.85
	7.55–8.05	7.20–7.88	7.13–8.17	7.53–8.01	7.29–8.16
POC (mgC/dm3)	1.92	3.95	3.49	0.69	0.72
	1.55–2.30	3.52–4.30	3.11–4.30	0.56–0.78	0.26–0.98
DOC (mgC/dm3)	10.9	19.4	15.9	7.32	6.02
	8.95–13.3	16.8–23.2	12.6–18.0	4.96–9.27	2.17–8.04
Phenols (mgC/dm3)	0.96	1.11	0.75	0.58	0.48
	0.85–1.06	0.95–1.30	0.55–0.89	0.48–0.68	0.37–0.59
TIN (μgN/dm3)	1101	732	670	446	313
	974–1233	616–843	586–770	357–508	234–433
DRP (μgP/dm3)	133	123	118	96.3	93.9
	106–137	92.6–134	116–121	85.3–106	90.4–95.7
Sulphate ions (mg/dm3)	77.1	44.2	46.8	36.1	31.8
	73.4–84.9	33.7–51.6	39.2–61.3	29.7–41.3	27.8–35.7
Chloride ions (mg/dm3)	23.4	14.2	13.9	11.3	13.4
	22.3–25.1	12.8–15.3	11.2–15.6	10.5–13.0	12.0–15.5