Large apartment communities across Karnataka, including Bengaluru, have been given 15 days to bring their on-site sewage treatment plants (STPs) into full operation, or face criminal proceedings under pollution-control norms, state Environment and Ecology Minister Ramalinga Reddy said on 3 September 2026 (The Times of India) (Prop News Time). The Karnataka State Pollution Control Board (KSPCB) set the deadline after a state-level review of pollution levels, the same meeting that handed industrial layouts a three-to-six-month window to install or restore STPs (The Times of India).
Key takeaways
- Bengaluru receives 2,000 MLD of water and generates about 1,800 MLD of sewage a day, of which 1,200 MLD is treated and 600 MLD is discharged untreated into waterbodies, according to Minister Ramalinga Reddy (The Times of India).
- KSPCB has flagged more than 500 apartment complexes for violating STP norms, and scientific officers have been told to survey every building with more than 80 units (The Times of India).
- Of 187 industrial layouts developed by KIADB across Karnataka, only 11 currently have operational STPs; the rest have been given three to six months to comply (The Times of India) (Prop News Time).
- Existing KSPCB penalties include a flat fine of INR 5 lakh for apartments running faulty STPs and fines as high as INR 3 crore for properties that have not installed an STP at all (Prop News Time).
- The drive sits inside Karnataka's commitments under the National Clean Air Programme and the National River Conservation Plan, with industrial areas singled out as the next enforcement focus (The Times of India) (Prop News Time).
What happened
Reddy reviewed KSPCB's functioning and used the meeting to direct inspections of apartment complexes, with criminal proceedings to follow against those found in violation. "The city gets 2,000 MLD of water daily and around 1,800 MLD sewage is released every day. While we treat and discharge 1,200 MLD, another 600 MLD is being let into waterbodies without treatment," he said, adding that many apartment STPs have been "dysfunctional for several years" and that a few STPs owned by the Bangalore Water Supply and Sewerage Board (BWSSB) are also out of order (The Times of India).
Under the prevailing KSPCB framework, apartment complexes with more than 20 residential units, or a built-up area of 2,000 square metres or more, are required to install an STP and reuse the treated water within the premises, and an estimated 3,500 apartment complexes in Bengaluru alone fall under that rule, though KSPCB has previously acknowledged gaps in its own data on how many of those STPs are actually running (Prop News Time). The board has separately been operating at around 40 per cent of its sanctioned staff strength, a constraint it has previously cited when explaining why inspections have lagged (Prop News Time).
On the industrial side, Reddy ordered KSPCB to serve formal notice on KIADB and give it three to six months to set up or restore treatment in industrial layouts, with the National Clean Air Programme and National River Conservation Plan cited as the policy frame (The Times of India) (Prop News Time). The state had no confirmed count of complexes that will fall under the 15-day drive as of the report's publication on 3 September 2026, and did not detail which criminal provisions would be invoked after the deadline lapses (Prop News Time).
| Reported figure | Value | Source |
|---|---|---|
| Bengaluru daily water supply | 2,000 MLD | The Times of India |
| Bengaluru daily sewage generated | 1,800 MLD | The Times of India |
| Sewage currently treated | 1,200 MLD | The Times of India |
| Untreated discharge to waterbodies | 600 MLD | The Times of India |
| Apartment complexes in violation | More than 500 | The Times of India |
| KIADB industrial layouts with STPs | 11 of 187 | The Times of India |
| Penalty for faulty STP in apartment | INR 5 lakh | Prop News Time |
| Penalty for no STP installed | Up to INR 3 crore | Prop News Time |
Specification read
The 2,000 MLD reported water supply equals 2,000,000 m³/day, and the 1,800 MLD sewage stream equals 1,800,000 m³/day, with the 600 MLD untreated load translating to 600,000 m³/day of raw domestic sewage still reaching lakes and rivers. At a typical domestic load of about 200 litres per capita per day (general industry range, not from the sources), the 1,800 MLD flow corresponds to roughly 9 million population equivalent of sewage generation, and the 600 MLD untreated fraction to roughly 3 million population equivalent running past the receiving waterbodies without treatment. For the apartment complexes caught by the 15-day notice, the relevant treatment train is a packaged Integrated Sewage Treatment chain: screening and grit removal, primary clarification, biological treatment (typically MBBR or SBR for a 80-plus-unit residential block, or MBR where the site needs high reuse quality), tertiary filtration and disinfection, plus on-site reuse for flushing and landscaping so the treated stream never leaves the premises. Industrial layouts facing the three-to-six-month clock sit in a heavier class and will normally need flow equalisation, biological treatment (A2O or UASB depending on influent strength), and a tertiary or ZLD polishing step, often front-ended by an Municipal-style intake works and finished with a DAF or media filter. If your plant is a residential-complex or layout-scale STP in the 0.1–5 MLD (100–5,000 m³/day) band, with typical domestic BOD in the 200–400 mg/L range and COD roughly twice that (general industry range, not from the sources), and you are now facing an inspection, criminal liability and a fine of INR 5 lakh for a faulty unit or up to INR 3 crore for no STP at all, the immediate engineering priority is to verify biological-stage aeration capacity, clarify reuse, and lock in tertiary polishing so the plant runs within the consent window. Buyers comparing options against this Karnataka compliance trigger will find a useful procurement framing in the side-by-side guides DAF vs Clarifier for Mining Wastewater in Brookhaven 2026 and DAF vs Clarifier for Mining Wastewater in Fairbanks, 2026: Which Should Factories Choose?, and dust-handling equipment around the generator yards flagged at the Jollywood site would fall under the Air Dust Treatment category.
FAQ
What is the exact deadline for a large apartment in Karnataka to get its STP running?
Large apartment communities have been given 15 days from the KSPCB review, and non-compliant complexes face criminal action under pollution-control norms (The Times of India) (Prop News Time).
How much can an apartment complex be fined for a non-functional or missing STP?
Existing KSPCB penalties include a flat INR 5 lakh fine for apartments operating faulty STPs, and fines as high as INR 3 crore for properties that have not installed an STP at all (Prop News Time).
What is the lead-time ballpark for getting a packaged STP back online for an 80-plus-unit complex?
For a residential complex in the roughly 100–5,000 m³/day class (general industry range, not from the sources), a packaged biological plus tertiary skid is typically engineered and installed over weeks to a few months, but the Karnataka notice compresses compliance to 15 days, so operators should plan for rapid audit, repair and re-consent rather than greenfield construction (The Times of India).
What is the industrial-cluster deadline, and how does it differ from the apartment deadline?
Industrial layouts have been given three to six months to install or operationalise STPs, with formal notice to be served on KIADB, against the 15-day window given to apartment complexes (The Times of India) (Prop News Time).
