Chemical Action Map

The EPA evaluates chemical risks one substance at a time — a framework designed decades ago that ignores the reality of industrial corridors where communities are exposed to dozens of toxics simultaneously through air, water, and soil.

Without a tool that quantifies cumulative exposure and connects it to political action, residents near these facilities have no data-backed way to demand stronger protections from the legislators who control EPA policy.

We built a full-stack Next.js application on top of ArcGIS WebGL that ingests facility-level emissions from the EPA Toxics Release Inventory, joins them with census-tract demographics and EDF's proprietary cumulative-risk model, and renders the result as a multi-layer interactive map.

Users can toggle health-harm overlays, filter by chemical class, and click any facility dot to see exactly what it releases and how the surrounding tract scores on cumulative risk — turning abstract regulatory data into a visceral, location-specific picture.

The "Send a Letter to Congress" feature closes the loop from awareness to action: enter a zip code, and the app resolves your congressional representatives, pre-fills a letter with your local exposure data, and lets you send it in one click.