Table 1.

Parameters of water in the power plant cooling system (data: Jaworzno III Power Plant)

Parameter	Unit	Min	Max	Average
General alkalinity	mval/l	1.10	2.30	1.35
Carbonate hardness	mval/l	1.10	1.65	1.35
Non-carbonate hardness	mval/l	7.55	13.15	9.50
Total hardness	mval/l	8.65	14.65	10.85
Calcium hardness	mval/l	4.25	8.95	6.00
pH	-	7.9	8.3	8.05
Specific electrolytic conductivity	μS/cm	919	1425	1091
Iron content	mg/l	0.05	0.51	0.133
COD	mg O2/l	5.2	17.5	9.1
Chloride content	mg/l	59.0	100.6	78.6
Sulphate content	mg/l	353	592	460
Silica content	mg/l	9.76	16.92	13.25
Ammonia content	mg/l	0.017	0.62	0.09
Total suspension content	mg/l	1.2	13.2	6.0