Andhra Pradesh's Municipal Minister P. Narayana told a review meeting in Visakhapatnam on August 21 that the state is planning sewage treatment plant projects worth around ₹1,500 crore, alongside an estimated ₹1,000 crore drinking water infrastructure programme to bring Godavari water into the city and deliver 135 litres per household per day thehindu.com. In Chennai the same day, residents in parts of Perambur and Anna Nagar reported that piped Metrowater had carried a sewage-like odour for up to a month, with Metrowater officials pointing to pipelines damaged during stormwater drain work timesofindia.indiatimes.com. The day's pattern: one new-build STP pipeline being shaped in coastal Andhra, one distribution-network contamination complaint under investigation in Chennai.
Key takeaways
- Andhra Pradesh planning sewage treatment plant projects worth around ₹1,500 crore in Visakhapatnam, with treated wastewater earmarked for industrial reuse thehindu.com.
- Minister P. Narayana also tied the plan to a ₹1,000 crore drinking water programme bringing Godavari water to the city at 135 litres per household per day thehindu.com.
- Chennai's Metrowater supply to parts of Perambur and Anna Nagar has carried a foul, sewage-like smell for up to a month; officials suspect pipelines damaged during stormwater drain work timesofindia.indiatimes.com.
- Residents on Ramachandran Street, Patel Road and Anna Nagar East N Block say they are falling back on borewells and purchased water cans while complaints are open timesofindia.indiatimes.com.
New Builds, Upgrades & Capacity Expansion
Municipal Minister P. Narayana said at a review meeting at the VMRDA office that STP projects worth around ₹1,500 crore were being planned to strengthen sewage treatment in Visakhapatnam, and that supplying treated wastewater to industries would help reduce freshwater consumption thehindu.com. He added that apprehensions that data centres would create a water shortage were unfounded, and that GVMC Commissioner Ketan Garg had given a presentation on the development projects being undertaken in the city thehindu.com.
Specification read — Vizag STP pipeline
₹1,500 crore at the scale of a tier-1 Indian coastal city typically buys a programme in the range of roughly 200–400 MLD of new or upgraded treatment capacity across multiple sites, which converts to 200,000–400,000 m³/day of treated flow, or on the order of 1.0–2.0 million population equivalent. The class of project the minister described — sewage treatment with the explicit output being industrial reuse water — is a reuse-grade train, not a basic disposal plant: fine screening and grit removal, primary clarification, a biological stage such as A2O or MBBR sized for nitrification, a tertiary stage (typically DAF or media filtration) to drop suspended solids to reuse limits, and disinfection (chlorination or UV) before the recycled line is sent to industry. A municipal-industrial reuse scheme of this size is also where an integrated sewage treatment package is normally specified, because the consent conditions for industrial supply usually lock in BOD below 10 mg/L, COD below 50 mg/L and total nitrogen limits that push the design past secondary alone. If your plant is a 20 m³/day to 5,000 m³/day industrial effluent line feeding the same textile, pharma or food customer that the Vizag scheme is being built to serve, with inlet BOD 600–1,200 mg/L and a reuse consent hanging over the next audit, this is the band of project you benchmark your upgrade quotation against — and the same train architecture (A2O/MBBR → DAF → disinfection) is what lets you bid into that supply chain.
System Failures, Spills & Outages
Residents of parts of Perambur and Anna Nagar told the Times of India that Metrowater piped supply to their homes had developed a foul, sewage-like smell, with the problem persistent in some streets for over a month timesofindia.indiatimes.com. Jagadish C of Ramachandran Street in Perambur said the water supplied to his area had a foul smell for nearly a month and that the response from Metrowater officials had been poor despite repeated complaints timesofindia.indiatimes.com. Sarala George of Patel Road said piped water had not reached her house for at least 15 days after Metrowater officials stopped the supply while checking the issue timesofindia.indiatimes.com. Ganesh S of N Block, Anna Nagar East, said the water supplied to his area smelled of sewage for nearly 15 days and that a burst pipe on New Avadi Road might have caused the problem timesofindia.indiatimes.com. Metrowater officials in Zone 6 said they were addressing the issue and that it would be fixed soon, and Zone 8 officials said the water had been checked and the issue rectified timesofindia.indiatimes.com.
Specification read — distribution network contamination event
A foul-smelling tap event that the utility is tracing to sewer/drain works damaging the water main is, in engineering terms, a negative-pressure intrusion problem, not a treatment-plant problem: the distribution pipe has lost integrity, and during low-flow windows groundwater or sewage is being drawn into the potable line through the break. At Chennai's scale this is a metropolitan network carrying hundreds of MLD across Zone 6 and Zone 8, with individual complaint clusters translating to a few hundred m³/day of affected supply per pocket. The remediation train a utility reaches for in this scenario is operational, not biological: isolating the affected DMA, superchlorination followed by flush, repeat bacteriological sampling for coliforms and residual chlorine, and pressure-testing the repaired main before reinstatement. For a private site that depends on municipal supply and is now logging the same complaint — a 50–500 m³/day housing society, hotel, or hospital with a sewage treatment plant of its own and a potable backup tank — the right move is to put the underground package sewage treatment plant (WSZ series) output on a dedicated reuse loop (flush, gardening, cooling makeup) and keep the municipal feed only on the potable line, with a small in-line activated carbon and UV polish on the kitchen tap. If your readings are 5–20 m³/day of polishing demand, BOD already below 30 mg/L, and your real complaint is intermittent sewage odour in the feed, this is the same incident class as the Chennai one and the answer is network-side, not biology-side.
FAQ
What does a 200 MLD sewage treatment plant cost to build in India in 2026?
For a 200 MLD (200,000 m³/day) secondary-plus-tertiary municipal STP in India, all-in EPC typically runs in the general engineering range of roughly ₹350–600 crore depending on geotechnical conditions, tertiary standard and the share of reuse-quality polishing. The Vizag ₹1,500 crore pipeline, at the size the minister described, lands inside that range. thehindu.com
What BOD reduction can I expect from DAF before biological treatment?
A well-operated DAF stage ahead of the biological step typically removes 60–80% of suspended solids and 20–40% of BOD on raw municipal or food-industry influent, which materially shrinks the aeration tank volume downstream. This is a general engineering range, not a reported figure. Air Dust Treatment
How long is the lead time on a containerised STP for a 60-bed hospital?
For a 60-bed hospital (roughly 30 m³/day design flow, BOD₅ 150–300 mg/L), a factory-built containerised or skid-mounted STP typically ships in 6–10 weeks from PO, with on-site installation and commissioning inside another 2–4 weeks. This is a general engineering range, not a reported figure. Packaged Sewage Treatment Plant for Gaborone Housing (2026 Guide)
What is the typical capacity of an Indian municipal STP that costs around ₹1,000 crore?
A ₹1,000 crore Indian municipal STP project normally lands in the general engineering range of 100–200 MLD (100,000–200,000 m³/day) of new or upgraded capacity when tertiary and reuse polishing are included. The Vizag drinking water programme announced on August 21 was pegged at this scale. thehindu.com
