Note on legislation: This section describes Czech legislation and Czech administrative practice. Treat it as general orientation only and always verify the current requirements with the relevant Czech building or water authority.
The most important change
The older article distinguished between two routes: a classic building permit and construction by “notification”. This should no longer be used as current guidance for new domestic wastewater treatment plants in the Czech Republic. The former notification regime for water works under Section 15a of the Czech Water Act has been repealed, and new projects must be handled under current Czech building and water law.
In practice this means: before buying a specific treatment plant, check with a designer and the relevant Czech authority which permit, documents and operating duties will be required at your site. The answer depends on sewer availability, the discharge route, hydrogeological conditions and water protection requirements.
What is usually dealt with
- Connection to public sewerage. If public sewerage ending in a treatment plant is available and connection is technically feasible, it is usually the preferred solution.
- Permit for the water work project. A domestic WWTP is a water work. The current Czech Building Act works with project permitting; the exact procedure is determined by the authority according to the nature of the project.
- Wastewater discharge permit. If treated water is discharged to surface water or groundwater, water use/discharge is also dealt with. A wastewater discharge permit is time-limited and, under the Czech Water Act, cannot be issued for more than 10 years.
- Operating conditions. The decision may include limits, sampling frequency, operating rules, record keeping or other duties.
How to proceed without unnecessary loops
- First check whether connection to public sewerage is possible and whether the operator has available capacity.
- Contact a water infrastructure designer. Without knowing the plot, receiving water and hydrogeology, a technology cannot be chosen responsibly.
- Discuss the intention in advance with the relevant Czech building or water authority. A short consultation often prevents a redesign.
- Only then choose a specific treatment plant and prepare the applications.
- After permitting and construction, keep track of operating duties, especially permit validity, analyses and maintenance.
What about older notified WWTPs?
If you already have a treatment plant historically notified under the former Czech regime, it does not automatically mean that you have to start again. It does mean that further operation, replacement of the technology or a change in discharge must be assessed using your original documents and the current position of the authority. Older notified plants could have regular inspections instead of laboratory analyses; whether that applies to you is determined by the conditions issued for your plant.
So treat the term “notified domestic WWTP” as historical. For a new project in the Czech Republic, it is not enough to say that you want a notified plant. You need to establish the current legal situation for the specific plot and the specific discharge route.