Repairs to the sewage treatment plant (STP) at Appu Ghar are sluggish though Rs.25 lakh has been sanctioned.
While Rs.18 lakh has been earmarked to repair the clarifier, the remaining Rs.7 lakh is meant for aerator.
Municipal Commissioner M V Satyanarayana, who visited the plant on Tuesday, said if the contractors were not executing the work properly, they should be changed.