Network of 13 Aqua One Centres (AOCs) established by NaCSA across Andhra Pradesh, providing affordable soil testing, water quality testing, and disease diagnostics to society farmers and non-society farmers alike. Services include water chemistry analysis (pH, salinity, alkalinity, ammonia, nitrite), pathogen testing, and general disease surveillance sampling. Operated by NaCSA staff and/or private entrepreneurs supported by NFDB under the PMMSY scheme. The AOCs also participate in MPEDA’s National Residue Control Programme (NRCP) sample collection.