🌱 Environment

Continuous Ambient Air Quality Monitoring Network (Kolkata)

The West Bengal Pollution Control Board (WBPCB) — a state agency, not Kolkata Municipal Corporation — operates continuous ambient air-quality monitoring stations (CAAQMS) in Kolkata, including at least two automatic stations at Victoria Memorial and Rabindra Bharati University plus several more named monitoring points (Ballygunge, Fort William, Jadavpur, Rabindra Sarobar) feeding both WBPCB's own EMIS citizen portal and the national Central Pollution Control Board's real-time Air Quality Index. The network measures, but Kolkata's air keeps failing what it measures: independent analysis by the University of Chicago's Energy Policy Institute found Kolkata's 2024 annual average PM2.5 at 45.6 micrograms per cubic metre — nearly nine times the WHO guideline and the second-worst among Indian metros after Delhi — and WBPCB's own chairman has publicly conceded it will be hard to cut pollution further without addressing sources outside the city's "regional air-shed." Unlike Delhi's GRAP, a bad Kolkata reading does not automatically trigger any enforcement action.

Live 📅 since 2015

🤖 AI-generated summary of the sources below — how this works · 🔎 Last verified 2026-08-02

🌱 Environment Air quality Sensors & IoT

🎓 Lesson

A public monitoring network that faithfully reports bad air is not the same project as one that acts on it — Kolkata has the former; Delhi's GRAP, by contrast, wires its readings to an automatic trigger.

Scale🏙️ City-wide

📖 Terms in this entry: Low-emission zone · Urban sensor network · Adaptive traffic signals

Sources

↗ West Bengal Pollution Control Board: Real-time Air Quality Sensor Network (aqicn.org)Confirms WBPCB operates a real-time air-quality sensor network feeding both its own and CPCB's national index

↗ Kolkata has second worst air among India's metros — what it needs to do to breathe better (University of Chicago EPIC)Independent source for the 2024 PM2.5 figure (45.6 µg/m³), Kolkata's national ranking, and a direct quote from WBPCB's chairman on regional-airshed limitations

↗ Ambient Air Quality Monitoring in West Bengal (WBPCB)Operator's own page for the monitoring programme (used only to confirm WBPCB, not KMC, runs it)

This overview was generated with AI from the public sources listed above and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

Continue exploring

Compare this project

🇮🇳 GRAP: Air Quality Readings as a Legal Trigger · New Delhi The contrast that defines this entry: Delhi's GRAP wires bad readings to an automatic legal trigger; Kolkata's network only reports. 🇹🇷 Istanbul Air Quality Monitoring Network · Istanbul Same pattern — Istanbul's stations have published real-time readings since 1995 with no automatic action tied to a bad one. 🇲🇳 Ulaanbaatar Air Quality Monitoring Network · Ulaanbaatar Another network that measures and publishes an index but stops short of triggering any restriction.

Explore the wider context

📟 A Reading Is Not a Decision 🌫️ Air quality guide 🏙️ Kolkata city profile 🌱 Environment projects

📎 Cite this project

1001 Smart Cities (2026). “Continuous Ambient Air Quality Monitoring Network (Kolkata)” — Kolkata, India. The Smart City Atlas. https://1001smartcities.org/projects/kolkata-wbpcb-air-quality-monitoring/ (last verified 2026-08-02). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

🚩 Report an error