ARA Tobl, TRA end TVA

Wastewater treatment, drying and incineration plant in Pflaurenz / Tobl

The wastewater treatment, drying and incineration plant Tobl is located in Pflaurenz / Tobl, a fraction of the municipality of St. Lorenzen.
The wastewater treatment plant has a capacity of 200.000 inhabitants, consisting of 33% permanent residents, 47% tourism and 20% industry.
The drying plant has a throughput capacity of 24.000 - 26.000 tons of sewage sludge per year.
The incineration plant has a capacity of 550 kg dry granulate per hour.
The catchment area covers 1.176 km².
The plant is looked after all year round and around the clock.

Contact us

Tour of the plant


Would you like to get a picture of our work for yourself?

Then we look forward to your visit, our employees will be happy to accompany you through the plant and show you,
how we treat your wastewater and dispose of the sewage sludge.

Please fill out this form and send it to us, we will contact you to make an appointment.

The guided tours are free of charge.
To guarantee the quality of the visit, the number of participants should not exceed 25 people.

Contact employees


Telephone number: 0474 479601

Your contact persons in Tobl:




Konrad Engl Business manager 0474 4796 01
Wolfgang Kirchler Operations manager 0474 4796 94
Hannes Kirchler Process engineering 0474 4796 88
Hubert Baumgartner Anlagentechnik mechanisch 0474 4796 92
Christoph Tinkhauser Mechanical plant engineering 0474 4796 96
Erwin Zemmer Main collectors / Small sewage treatment plants 0474 4796 23
Thomas Stampfl IT and EDP 0474 4796 85
Carolina Zanella Administration 0474 4796 29
Kathrin Oberschmied Integrated management 0474 4796 14
Illona Graf Waste recycling 0474 4796 20



ARA Tobl
Pflaurenz / Tobl 54
39030 St. Lorenzen

Opening hours

Monday: 07:30-12:00, 13:00-17:00 hours
Tuesday: 07:30-12:00, 13:00-17:00 hours
Wednesday: 07:30-12:00, 13:00-17:00 hours
Thursday: 07:30-12:00, 13:00-17:00 hours
Friday: 07:30-12:00, 13:00-17:00 hours
Saturday: Closed
Sunday: Closed

Standby duty


The system is monitored around the clock by on-call service.
For emergencies outside our opening hours, please contact our on-call number: 342 515 8615 or 0474 4796 80

A technological miracle in the mountain.

For the cavern construction, 200,000 m3 of solid material were extracted from Mt. Tobl, for which the plant was also named. The construction required 740 km of drilling and 220 tonnes of explosive agent. The underground galleries' cross section is twice as big as an underground motorway tunnel's cross section. The total sewage line, the ventilation system centre, as well as the dosing apparatuses are installed in the galleries. Also the digestion tower, with exception of the gas area, is built into the rock. Only the remaining sludge line, the entire gas line and the drying plant are located in the above-ground plant building.

A technological miracle in the mountain.

Longitudinal profile Klosterwald