Key Questions
What does an AMC for an STP, ETP or RO plant cover?
An AMC covers scheduled preventive maintenance, corrective repairs and compliance documentation for a plant your own team operates. Comprehensive O&M goes further: Navbharat Water supplies the operators, chemicals, routine lab testing and sludge handling, and runs the plant end to end. Operator deployment sits between the two.
The right level depends on how much of the plant you want to hand over. A typical scope list includes shift operators, preventive maintenance of pumps, blowers, diffusers and dosing systems, spares management, routine lab testing of inlet and outlet, compliance registers and OCEMS data upkeep where the plant is connected, membrane cleaning for MBR, UF and RO systems, and sludge dewatering and disposal coordination. The AMC described on our service models page is the owner-operated version: preventive maintenance, corrective response, spare parts and annual SPCB compliance documentation for a fixed yearly cost. Comprehensive O&M suits owners who do not want to employ or train plant staff at all. Operator deployment suits sites that already manage maintenance and spares but need reliable, supervised operators on every shift. All three apply to STPs, ETPs, WTPs, RO and UF plants and ZLD systems from 10 KLD to 10 MLD.
Can you take over an existing plant built by another supplier?
Yes. Navbharat Water takes over plants of any make and age. The takeover follows a fixed sequence: a site audit of the plant's condition and performance, a costed rectification list, repairs to bring the plant back to its design outlet, and then handover into an AMC or O&M contract.
Taking over a plant without an audit means inheriting its problems, so the audit comes first. Engineers check tanks and civil condition, pumps, blowers and motors, instruments and control panels, and the biological or membrane process itself, and they sample inlet and outlet to see how far the plant is from its design and consent values. Common findings are undersized or failed aeration, dosing systems out of calibration, fouled membranes, accumulated sludge and missing records. The rectification list separates what must be fixed before handover from what can be scheduled later, so the owner can plan spending. Once the plant meets its baseline, operating responsibility transfers and the contract clock starts. Navbharat Water has delivered more than 150 plants of its own, so its operators know the technologies they are taking over: MBR, MBBR, SBR and activated sludge STPs, physico-chemical and biological ETPs, softeners, RO and UF.
How is an O&M contract priced and measured?
O&M is priced either as a fixed monthly fee or as a rate per kilolitre treated, quoted after the site audit. Performance is measured against agreed outlet parameters, plant availability and reporting obligations, which are written into the contract rather than assumed. Navbharat Water does not publish rate cards.
A fixed monthly fee suits plants with steady flows, such as hotel or hospital STPs. A per-kilolitre rate suits plants whose flow varies with production, because the fee tracks what is actually treated. The quote depends on plant type and capacity, technology, number of shifts, whether chemicals, consumables and spares are included, sludge disposal distance, and the condition of the plant after rectification. Service levels are agreed in the contract: which outlet parameters are tracked and how often they are tested, response times for breakdowns, spares held on site, and the format and frequency of reports. The AMC on our service models page commits to emergency corrective response within 24 hours. Reports typically combine daily logs, lab results, maintenance records and a management summary, and plants connected to the Smart Water platform add live flow and quality dashboards so owners can check performance without waiting for the monthly report.
How does O&M connect to BOOT and Water-as-a-Service?
O&M is the operating half of BOOT and Water-as-a-Service without the financing. You own the plant and Navbharat Water runs it. Under BOOT or Water-as-a-Service, Navbharat Water also funds and owns the plant, and you pay per kilolitre treated instead of buying the asset.
Many owners start with O&M on an existing plant and move to a service model when the plant needs expansion or replacement. Under BOOT, Navbharat Water designs, finances, builds and operates the plant on your site for an agreed term of 10–20 years, typically 12–15, after which ownership transfers to you. Under Water-as-a-Service there is no transfer: Navbharat Water keeps owning and operating the plant and sells treated water at an agreed quality and price per kilolitre. In every model the day-to-day work is the same: trained operators, preventive maintenance, lab testing, membrane care, sludge handling and compliance records. Smart monitoring strengthens all of them. Plants connected to Navbharat Water's Smart Water platform stream flow, pH and quality data to a dashboard, so drift is caught between site visits and OCEMS data reaches the regulator where the consent requires it. Compare the models on the service models page before choosing.
