In the period of Christmas and New Year's Eve we are reachable by Hotline via the number 0831 5617 430 or via email to HydroService@otthydromet.com as follows:

• On Friday, December 13, 2019, we can be reached only in the morning at the known telephone number (see above).
• On Monday, December 16, 2019 to December 20, 2019 you can reach us at the usual times and under the normal telephone number.
• On Monday, December 23 you can reach us under the normal conditions.
• On Tuesday, December 24, 2019 you can reach us only in the morning under the mobile phone number +491723948283.
• On Friday, December 27, 2019 you can reach us under the normal conditions.
• On Monday, December 30, 2019 you can reach us under the normal conditions.
• On Tuesday, December 31, 2019 you can reach us only in the morning under the mobile phone numer +491723948283.
• On Thursday, January 2, 2020 and Friday, January 3, 2020 you can reach us under the normal conditions.
• From Tuesday, January 7, 2020 on, you can reach us under the normal conditions again.