Vodakva operates 84 sewage treatment plants, most of them are mechanical-biological, one is mechanical. About 95% of inhabitants in the area of operation are connected to a sewer system finished by a central Sewage Treatment Plant (STP), i.e. about 180 thousand inhabitants. Sewage treatment plants are progressively automated, intensively reconstructed and modernized in order to meet strict limits of outlet water pollution. Large sewer systems with a central STP have been built thanks to the municipalities´ solidarity within the Water Management Association.
The biggest sewage treatment plants:
| STP | type | construction year | latest reconstruction | capacity | |
|---|---|---|---|---|---|
| EO | Q24 (l/s) | ||||
| Drahovice | mechanical biological D-N | 1967 | 2008 | 80000 | 287,1 |
| Ostrov | mechanical biological R-D-N | 2007 | 21652 | 70 | |
| Stříbro | Deep Shaft activation in combination with D-R-D-N | 1961 | 2012 | 15500 | 29,2 |
| Chodov | mechanical biological D-R-D-N | 1963 | 2007 | 14697 | 33,2 |
| Chodová Planá | SBR technology | 1985 | 2012 | 13700 | 8,7 |
| Tachov | mechanical biological R-D-N | 1968 | 2011 | 11578 | 45,7 |
| Jáchymov | mechanical biological D-N | 1993 | 11 400 | 31,2 | |
| Horní Slavkov | SBR technology | new STP 2007 | 9347 | 27,2 | |
| Vejprty | mechanical - biological D-N | 2007 | 5067 | 16,6 | |
| Nová Role | mechanical biological D-N | 1963 | 1995 | 5 000 | 13,7 |