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DATA ACQUISITION SUMMARY - MULTI-SOURCE
Generated: 2025-12-25 04:13:31
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1. REAL-TIME DATA SOURCES
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OpenAQ Data: Not available (API deprecated/inaccessible)

AQICN Current Data: 4 records
Cities covered:
  - New Delhi: AQI = 72
  - Mumbai: AQI = 72
  - Bengaluru: AQI = 72
  - Hyderabad: AQI = 72


2. HISTORICAL DATA (WORLD BANK)
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Total Records: 70
Year Range: 1990 to 2020

Indicators:
  - PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)
    Records: 31
    Years: 1990 - 2020
  - PM2.5 air pollution, population exposed to levels exceeding WHO guideline value (% of total)
    Records: 12
    Years: 1990 - 2017


3. SYNTHETIC/DEMONSTRATION DATA
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Total Records: 43,836
Date Range: 2015-01-01 to 2024-12-31

Records by City:
  - New Delhi: 10,959 measurements
  - Mumbai: 10,959 measurements
  - Bengaluru: 10,959 measurements
  - Hyderabad: 10,959 measurements

Note: Synthetic data generated based on typical pollution patterns
for demonstration purposes. Real historical data from World Bank.


4. DATA COVERAGE ASSESSMENT
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Historical coverage (World Bank): 1990 - 2020
Detailed synthetic data: 2015 - 2024

Data Sources Status:
  ✓ World Bank API: Available
  ✗ OpenAQ API: Unavailable (v2 deprecated, v3 not accessible)
  ✓ AQICN API: Available (current data only)
  ✓ Synthetic data: Generated for demonstration


RECOMMENDATIONS:
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1. For real-time data: Consider using CPCB India official data portal
2. For historical data: World Bank provides country-level annual averages
3. For city-specific historical data: Manual download from OpenAQ data explorer
4. Alternative APIs: IQAir, AQICN (requires API key)

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