Evaporative cooling systems, cooling towers and wet separators; displays and notifications

Operators of evaporative cooling systems, cooling towers and wet separators are obliged, among other things, to apply the state of the art during construction and operation and to implement organizational measures.



Whether an installation is covered by these regulations is determined by the scope of application (Section 1) of the 42nd BImSchV.


Notifications in accordance with Section 13 of the 42nd BImSchV and notifications in accordance with Section 10 of the 42nd BImSchV must be submitted online via the website of the "Cadastre for the registration of evaporative cooling systems 42nd BImSchV - KaVKA-42.BV".

Notifications in accordance with Section 14 of the 42nd BImSchV can also be submitted via this website.

Applications for exemptions in accordance with Section 15 of the 42nd BImSchV can be submitted informally to the relevant district administrative authorities.


The notification obligation in accordance with Section 13 of the 42nd BImSchV came into force on 19.07.2018. The operator of a new system must notify the competent authority no later than one month after the first filling with process water. Existing systems had to be notified to the competent authority by 19.08.2018 at the latest. In addition, Section 13 contains further deadlines for the notification of a change or decommissioning of a system as well as a change of operator.

According to Section 10, the operator must inform the competent authorities immediately in accordance with Annex 3 Part 1 and inform them within a period of four weeks in accordance with Annex 3 Part 2 as soon as a laboratory test shows that the action values have been exceeded.

According to § 14 para. 2, the operator must inform the competent authority of the results of the inspections in accordance with § 14 para. 1 within four weeks of completion of the inspection.

Processing time

Information on this can be obtained from the responsible district administrative authority.


Please select a location in "Localization" so that the address of the responsible authority can be filled in.

  • Prefillable Form, Bavaria-wide: Formloser Antrag (mit Unterschrift)
    Please note

    This form has to be signed and sent to the responsible authority. You can sign the form manually and send it by email/fax or sign the form electronically with your qualified electronic signature an send it by (secure) email. If the responsible authority has set up a De-Mail account, you can also send the form by De-Mail using an sender-confirmed message.

Online procedures

  • Kataster zur Erfassung von Verdunstungskühlanlagen (KaVKA-42.BV)

    You can notify evaporative cooling systems, cooling towers and wet separators online in accordance with § 13 of the 42nd Ordinance on the Implementation of the Federal Immission Control Act (Ordinance on Evaporative Cooling Systems, Wet Separators and Cooling Towers - 42nd BImSchV).


  • Display and notifications via the KaVKA register are free of charge.

Links to more information


Responsible for editing:Bayerisches Staatsministerium für Umwelt und Verbraucherschutz

Contains machine translated content. Show the original content

  • Online transactions, Bavaria-wide
  • Online transactions, locally limited
  • Form, Bavaria-wide
  • Form, locally limited
  • Prefillable Form, Bavaria-wide
  • Legal bases, Bavaria-wide
  • Legal bases, locally limited
  • Fees, Bavaria-wide
  • Fees, locally limited
Bild zur Leistungsbeschreibung

Responsible for you

If you select a location under "Localization" the contact details of the responsible authority and, if applicable, locally valid information will be displayed.