Warming every decade.
Safest among six metros.
218 million Metro rides a year.
Kolkata in data: 19 domains, 30+ open datasets, one city's full portrait.
Safest major metro (2023)
68.7per 100K
IPC crime rate — lowest among India's 6 largest cities. Bengaluru is 5x higher at 346.
India's oldest metro, fully recovered
218Mriders
FY2024-25. From an 87.6% COVID drop to a complete rebound — the arc of India's first underground railway.
Explore the dataHospital beds: 7x national average
61vs 9 national
Beds per 10,000 people. The medical college belt is one of India's densest healthcare corridors.
Explore the dataRamsar-protected wetlands, still shrinking
27%lost
East Kolkata Wetlands: 125 to 91 sq km (2000-2023). A Ramsar site that feeds the city's sewage-fed fisheries — vanishing despite international protection.
Explore the dataKolkata's warming
+0.03°C per decade
How well do you know Kolkata?
Among India's 6 major metros, Kolkata's crime rate ranks:
Explore the Data
People & Places
Environment & Climate
Climate
75 years of warming data from IMD.
IMD + Open-Meteo · 2026-04-26
UpdatedAir Quality
Winter inversions trap pollution. Daily AQI since 2022.
Open-Meteo CAMS · 2026-04-26
Water & Flooding
Hooghly gauge, monsoon floods, rainfall patterns.
CWC Garden Reach gauge · 2025-03
Waterlogging & Drainage
38 hotspots, 27 pumping stations, borough vulnerability mapped.
Health & Society
Healthcare
97.5% institutional births but 58% women anemic.
NFHS-5 2019-21 · 2021-01
Education
86.5% govt schools, 99.6% have electricity, 31% have computers.
UDISE+ 2023-24 · 2024-03
Crime
Lowest crime rate among 6 metros at 68.7/100K.
NCRB 2023 · 2023-12
Disease
Dengue, malaria, waterborne outbreaks by season.
IDSP/NVBDCP · 2024-12
Economy & Infrastructure
Transport
Metro recovery, road deaths, 40-year ridership.
Metro Rail Corp + MoRTH · 2025-03
UpdatedBudget
A decade of KMC revenue and expenditure.
KMC Budget 2026-27 · 2026-03
Real Estate
RBI HPI + NHB RESIDEX quarterly trends.
RBI HPI + NHB RESIDEX · 2024-12
Employment
PLFS workforce data, e-Shram informal sector.
PLFS 2023-24 + e-Shram · 2024-03
Energy
WB consumption at half national average; CESC 7% T&D losses.
CEA + CESC · 2024-03
Digital
Tele-density 145.8%, CPGRAMS 96% disposal.
TRAI + CPGRAMS · 2024-12
Judiciary
5.1-year avg pendency, 12.4 judges per million.
NJDG snapshot · 2024-12
Open-Meteo API — Weather & Air Quality
India Meteorological Dept (OpenCity.in) — Temperature 1951-2024
National Crime Records Bureau (OpenCity.in) — Crime 2021-2023
National Family Health Survey (NFHS-5) — Healthcare Indicators
Unified District Info System for Education (OpenCity.in) — Education Data
Kolkata Metro / Indian Railways — Ridership
WB Traffic Police — Road Accidents
Census 2011 — Demographics & Amenities
Kolkata Municipal Corporation Budget Statements — Finance 2017-2027
Official Hospital Websites + WB Dept. of H&FW — Infrastructure
RBI Housing Price Index (DBIE) + NHB RESIDEX — Real Estate 2009-2024
Periodic Labour Force Survey (PLFS) — Employment 2017-2024
e-Shram Portal — Informal Worker Registrations
Central Electricity Authority (CEA) + CESC — Energy 2014-2024
TRAI Quarterly Performance Reports — Telecom 2015-2024
CPGRAMS (DARPG) — Public Grievance Resolution 2018-2024
IDSP/NVBDCP — Disease Surveillance 2018-2024
Central Water Commission — Flood Gauge Data 2015-2025
National Judicial Data Grid (NJDG) + India Justice Report — Judiciary 2018-2024
ISRO Bhuvan LULC + Copernicus Global Land Cover — Land Use 2005-2022
Ramsar / EKWMA Reports — East Kolkata Wetlands Area
Election Commission of India + WBSEC (OpenCity.in) — KMC Elections 2010-2021
Demographics & Wards — KMC (city proper), 144 wards, ~206 sq km. Source: Census 2011.
Climate — Alipore Observatory (IMD station, south Kolkata, within KMC) + Open-Meteo reanalysis (~25 km grid cell).
Air Quality — Open-Meteo / CAMS atmospheric model (~40 km grid cell centred on Kolkata). Modeled, not station-observed.
Healthcare — Kolkata revenue district (~185 sq km, slightly smaller than KMC). Source: NFHS-5.
Education — Kolkata education district (~185 sq km, approx. matches revenue district). Source: UDISE+.
Crime — Kolkata Police Commissionerate (~530 sq km, ~2.5x larger than KMC). Source: NCRB.
Transport — Mixed: Metro network (cross-boundary), city accidents (Kolkata Police area), state data (all West Bengal), NH data (national highways).
Budget — KMC (~206 sq km). Source: KMC budget statements.
Real Estate — RBI HPI covers 10 cities (Kolkata as a whole); NHB RESIDEX covers metro-level assessment.
Employment — WB Urban (PLFS proxy for Kolkata metro); e-Shram covers Kolkata district registrations.
Energy — State-level (WB) for CEA data; city-level for CESC licensed area (~567 sq km, larger than KMC).
Digital — Kolkata Metro telecom circle (TRAI); CPGRAMS covers West Bengal state.
Disease — Kolkata district. Curated from IDSP weekly reports and NVBDCP summaries (PDF-only).
Water — Garden Reach gauge station, Hooghly River. CWC flood bulletins (PDF-only, curated).
Judiciary — Kolkata district courts (4 courts); Calcutta High Court (state-level). Source: NJDG snapshots.
Land Use — KMC area (~206 sq km). Satellite-derived from ISRO Bhuvan + Copernicus. Built-up trend extended to 2022.
Population (home page) — Urban Agglomeration (~1,204 sq km, includes Howrah, Salt Lake, etc.). Source: UN World Urbanization Prospects.