With the purpose of reducing environmental impact, Univates launched a compact Effluent Treatment Plant in 2011. Located next to the library, it serves buildings 1, 2, 3 and 5.

The effluent treatment plant consists of a reservoir made of glass fibre, which besides being an anaerobic reactor, also has an aeration system, thus contributing to the growth of more effective bacteria that contribute to residue decomposing at the effluent treatment plant. It was designed to improve the sewage treatment system which had been working in each building separately.

Before the plant was built, each building had a simpler system with no aeration. The new plant has helped reduce the production of sulphide (a chemical parameter that is an indication of foul odour), the chemical and biochemical oxygen demands, (organic matter) nitrogen and phosphorus (may cause eutrophication when washed into rivers and lakes)

In 2012, Effluent Treatment Plants are expected to be built in buildings 7, 8, 9, 11 e 12. Building 16 is equipped with a filter and an anaerobic reactor. Univates Sport Centre has a simpler treatment system. The recently built premises (building 17 and Tecnovates) have their own systems.