Air Viewer

Air Viewer helps researchers, planners, outdoor workers, and travelers assess current and historical air quality for a location using multiple data sources.

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About This Tool

Air Viewer ingests real-time AQI data from public sources (EPA AirNow, OpenAQ, and local monitors) and harmonizes concentrations to a common AQI scale. It records location, time, and pollutant measurements to enable location-aware analysis.

Core features include per-pollutant AQI calculations, a global maximum AQI as the overall index, historical trend visualization, and exposure estimation for a user-defined duration. Optional tools support data source weighting, quality flags, and multi-location comparisons, plus export capabilities.

Benefits and differentiators: researchers, city officials, outdoor workers, and health authorities gain accurate, auditable air quality insights. The tool emphasizes data provenance, confidence scoring, and export-ready data for reporting and policy evaluation. Use cases include planning outdoor events, issuing advisories, validating mitigation measures, and conducting urban air quality studies.

Save your calculation history with a free account

How to Use

Provide inputs: location (city or coordinates) and a time window.
Select pollutants and data sources to include in the calculation.
Run calculation to obtain current and historical AQI values and exposure estimates.
Review outputs: overall AQI, pollutant AQI, trends, and exposure metrics.
Export data or configure alerts for threshold breaches.

Frequently Asked Questions

Find Quick Answers

What is Air Viewer?

Air Viewer is an analytical tool that aggregates real-time and historical air quality data from multiple sources, computes AQI per pollutant, derives an overall AQI, and estimates exposure for given locations and time periods.

Which data sources are used?

The tool pulls data from publicly available sources such as EPA AirNow, OpenAQ, and local monitoring networks. Data quality flags are applied, and missing values are flagged for transparency and alternatives are suggested.

What outputs are provided?

Outputs include pollutant-specific AQI values, an overall AQI, time-series trends, exposure estimates (µg/m3-hr), and export options (CSV/JSON) for reporting and integration with other systems.

How is exposure calculated?

Exposure is computed as a time-weighted average concentration over the defined period, transformed into a standardized metric (µg/m3-hr) to reflect cumulative inhalation risk for the user-defined duration.

Need to run multiple calculations?

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