Historical Analysis

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Move History as a Timeline

This tab focuses on storytelling over time: where someone lived, when they moved, and how estimated PM2.5 exposure changed between moves.

Use CSV or JSON history input to:

• Plot addresses in chronological order on a map
• Connect moves as a timeline path
• Color markers by era or by estimated PM2.5
• See a stepped PM2.5 time series with move-by-move change summaries

Move History Timeline

Enter residential history as CSV or JSON to map each move in order and estimate PM2.5 exposure by residence.

PM2.5 source: PurpleAir (Jan 1-25, 2026) EPA AQS (Jan 1-30, 2025)

Marker colors: By era By PM2.5

Residential history (CSV or JSON):

Build Timeline Load Demo Data

Estimated PM2.5 at Residence Over Time

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ZIP Code PM2.5 Exposure Tool

ZIP Code PM2.5 Exposure Tool

Enter one or more ZIP codes (comma or newline separated) to estimate PM2.5 exposure at each location using interpolated data.

PurpleAir (Jan 1–25, 2026) EPA AQS (Jan 1–30, 2025)

ZIP codes:

Buffer radius: Point only 250 m 500 m 1 km Show contributing sensors Compute

Large markers are ZIP centroid estimates; small colored markers show nearby contributing sensors and their PM2.5 values.

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