Loudoun County, Virginia

Geo level: countyFIPS: 51107Last update: Jul 22, 2026

Map

PM2.5(µg/m³)

EPA AQS · 2023
mean: 9.2 µg/m³ · max: 18.5 µg/m³

County-level resolution. No sub-county variation available in current data. Classification: single county-level value (no quantile classification — one feature).

Exposure Layers

Choropleth layer
County-level value of PM2.5 for Loudoun County, Virginia
AreaPM2.5 (µg/m³)Details
Loudoun County, Virginiamean: 9.2 µg/m³; max: 18.5 µg/m³

Health Burden (vs State & National)

asthma — hospitalization_rate

Unit: per 10,000 population | Source: Virginia Department of Health, Environmental Public Health Tracking (2023)

Region4.2
State5.1
National4.9

95% CI: [3.5, 5] — this interval overlaps the national value, so the point estimates are not distinguishable at this precision.

asthma — prevalence

Unit: percent | Source: BRFSS (Behavioral Risk Factor Surveillance System) (2023)

Region8.2
State9.4
National8

Loudoun County, Virginia is below the state rate and above the national rate for this measure.

Model Feature Attributions (SHAP)

SHAP values describe how this model weighted each feature when producing its prediction on regional training data. They are not estimates of causal effect. A feature can carry high attribution because it correlates with variables the model does not observe.

  • PM2.5positive attribution (mean SHAP: 0.280)
  • traffic_proximitypositive attribution (mean SHAP: 0.220)
  • socioeconomic_indexnegative attribution (mean SHAP: -0.180)
  • green_spacenegative attribution (mean SHAP: -0.120)

Model Card

Version
1.0
Training cutoff
2024-06-01
Features used
PM2.5, traffic_proximity, socioeconomic_index, green_space, healthcare_access
Full model card →

Educational Resources