PIA GmbH is your accredited and notified testing body for the certification of wastewater treatment products. Our range of services covers a broad spectrum of small and medium-sized wastewater treatment plants. PIA GmbH has become the largest testing laboratory of its kind and has a favourable location in the heart of Europe. Situated at “Bildchen” – the former wastewater treatment plant of the city of Aachen – PIA has the optimal conditions to examine your small wastewater treatment system, ship sewage treatment plant or other wastewater treatment systems.