US-SEER
Tracking all 3,142 U.S. counties
The Earth Prize 2026 Submission

See How Pollution Affects HealthAcross Every U.S. County

An interactive open-data platform connecting air pollution, toxic chemical releases, and respiratory illness across the nation.

EPA Air Quality & Toxic Releases
CDC Health & Mortality Records
U.S. Census Demographics
Interactive County Map3,142 Counties
Open Fullscreen Map
Platform
Platform Features
Interactive Map

Explore Any County

3,142 counties

View air pollution, chemical releases, and health risks for all 3,142 U.S. counties. Click any county to inspect metrics or compare two areas side by side.

Select a metric to preview
Composite Risk(0 - 100 Score)
Nat. Avg: 52.4
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
12 (Low) → 94 (High)Full 50-state coverage
2018–2024 annual records includedExplore on Map
Data Analysis

Research & Statistics Lab

Regression Models

Analyze real data to see how air pollution directly correlates with lung disease and respiratory mortality across the nation.

PM2.5 vs. Mortalityp < 0.001
R² = 0.412 · N = 3,142
Slope (β)
+3.84 deaths/µg
T-Stat
+14.82 ✓
Scatter plots & demographic quintilesLaunch Lab
2018–2024

Year-by-Year Trends

Track county particulate shifts across 7 annual snapshots — covering wildfire seasons, policy changes, and emission events.

20247.8 µg/m³
201820212024
Event: Current EPA 9.0 µg/m³ Primary Standard
Scrub timeline on map
Case Study

Northern Nevada (NV-02)

A closer look at Northern Nevada — exploring rural healthcare access, mining emissions, and high-desert smoke dynamics.

Key CountiesWashoe, Elko, Humboldt
Provider Ratio1:2,450 (Deficit)
Wildfire RiskElevated — Tier 4
FIPS32031 (Washoe)
Open NV-02 deep dive
Reports

Download PDF Reports

Generate clean summary reports for any county, comparing local metrics against EPA national health standards.

Single & dual-county comparison
EPA NAAQS compliance benchmarks
High-resolution vector PDF format
Multi-metric radar chart overlay
Export county report
Findings
Key Research Findings
74 Hotspots
74counties

Counties in the highest tier for air pollution, lung deaths, and poverty face +59% higher respiratory death rates than the national average.

High-burden intersection · N = 2,953
Rural Link
p < 0.001

In rural communities, fine particle pollution (PM₂.₅) is a strong predictor of lung disease deaths, even after accounting for poverty and smoking.

Statistically significant · N = 1,138 rural counties
Combined Link
35.4%variance

A model combining air pollution, smoking, poverty, and uninsured rates accounts for 35.4% of all county-level lung mortality differences across America.

Multiple regression · N = 2,953
Top Factor
27%explained

Smoking rates and fine particle pollution are the two largest measurable drivers of county-level lung health outcomes nationwide.

Pearson r = 0.521 · p < 0.001
Study overview: Cross-sectional analysis of 2,953 U.S. counties using EPA, CDC, and U.S. Census federal datasets (2018–2022). Results represent county-level population associations.
Explore in Lab
Get Started

Ready to explore your
community's environmental health?

Search your county, compare health risks, or view the research findings. All data is open and sourced from federal agencies.

EPA Air QualityCDC WONDEREPA Toxic ReleasesCDC Health SurveysCensus DemographicsFull docs