A central component of our understanding of quality is the regular and professional review, including certification, of all areas of the company. Our quality, environmental and energy management systems are certified in accordance with ISO 9001, 14001 and 50001. Our company’s creditworthiness is also regularly checked by external ratings and certified as “very good”.

You can find an overview of all our certificates here. Of course, all certificates are also available for download.

Quality management

ISO 9001

NOBRA Certificate ISO 9001

Download certificate

Environmental management

ISO 140001

NOBRA Certificate ISO 14001

Download certificate

Energy management

ISO 50001

NOBRA Certificate ISO 50001

Download certificate

Certified waste management company

§56 KRGW

Download certificate

Credit standing certificate



Download certificate



Download certificate