Small wastewater treatment plant; transmission of confirmation of proper installation

Before a small wastewater treatment plant (WWTP) goes into operation, a building inspection must be carried out after completion in accordance with water legislation. For this purpose, the client commissions a private expert in water management (PSW). As part of an on-site inspection, the PSW confirms to the responsible authority that the small wastewater treatment plant has been constructed in accordance with the water law permit. If there are any deviations between the installed and the approved small wastewater treatment plant, these are determined by the PSW on site and described in the construction acceptance report.

The commissioned private expert must be recognized by the Bavarian State Office for the Environment for the "Small sewage treatment plants and wastewater collection pits" area of recognition in accordance with the Ordinance on Private Experts in Water Management (see "Further links").

The building acceptance report must be drawn up:

• after completion (including proof of tightness)
• before the system is put into operation

The private expert in water management charges the operator of the small wastewater treatment plant for his work. No further costs are incurred by the authority.

• Art. 61 para. 1 Bavarian Water Act (BayWG)

• Private experts in water management (PSW)

  Lists of recognized PSWs

• Ordinance on private experts in water management
• Working aids for private experts in water management

  Information for PSW

• Wastewater disposal from individual properties

  Information for the general public on the subject of small wastewater treatment plants

• Brochure "Wastewater treatment with small wastewater treatment plants - information on planning, construction and operation"
• Frequently asked questions and answers

  Information on small sewage treatment plants and wastewater collection pits

The building acceptance report should be prepared digitally by a recognized private expert in water management (PSW) and sent to the responsible authority online.

• The online procedure may only be used by a recognized private expert in water management (PSW). The recognition number must be stated.
• The PSW must confirm that it has been commissioned by the client.
• Upon dispatch, a data record is transmitted electronically to the competent authority for further processing in its own municipal software programs.
• A pdf file can also be generated and sent by the system.
• The authority then informally completes the construction acceptance according to water law without informing the PSW or operator.
• The PSW saves the contents transmitted via the online procedure as a summary (protocol as a file in pdf format) in its project file for documentation purposes. It also sends this file to the operator for its records in the operating log.

There is neither a statutory processing deadline nor a formal requirement for completion of the construction acceptance by the authority. The authority will take action if the PSW identifies and describes deviations between the installed and the planned or approved small wastewater treatment plant.