AQHI Report - ARP Sensors
March 23, 2026
Maryland Department of the Environment
| Health Risk | AQHI | At Risk Population | General Population |
|---|---|---|---|
| Low Risk | 1 – 3 | Enjoy your usual outdoor activities. | Ideal air quality for outdoor activities. |
| Moderate Risk | 4 – 6 | Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms. | No need to modify your usual outdoor activities unless you experience symptoms. |
| High Risk | 7 – 10 | Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy. | Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms. |
| Very High Risk | 10+ | Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion. | Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms. |
Health Vulnerability Statement
All communities included in this report are designated as “underserved” by MDEnviroScreen. Notably, Turner Station, Cheverly, Cedar Heights, Curtis Bay, and areas near HCNR, and HU-B are further classified as “overburdened,” meaning they face a cumulative impact of three or more environmental or health stressors.
Critical sensitive population indicators (75th Percentile or higher):
- Low Birth Weight: Curtis Bay and Turner Station.
- Asthma Discharges: Annapolis, Curtis Bay, and Turner Station.
- Myocardial Infarction (Heart Attack): Curtis Bay and Turner Station.
Due to these compounding health disparities and socio-environmental stressors, the reported Air Quality Health Index (AQHI) represents a conservative baseline; the actual risk to residents in the tracts mentioned above is likely higher than the index alone suggests.
Spatial distribution of overburdened communities via MDEnviroScreen.
| Sensor | Total_Hours | Mean_AQHI | Median_AQHI | Max_AQHI | Hours_High_Risk | Min_AQHI |
|---|---|---|---|---|---|---|
| MOD-00745 - Cedar Heights | 180 | 4 | 4 | 5 | 0 | 2 |
| MOD-00746 - HCNR | 180 | 4 | 4 | 5 | 0 | 2 |
| MOD-00747 - Turner Station South | 180 | 4 | 4 | 5 | 0 | 2 |
| MOD-00748 - Annapolis | 180 | 4 | 4 | 5 | 0 | 2 |
| MOD-00749 - HU - Beltsville | 180 | 3 | 3 | 5 | 0 | 2 |
| Monitor | Total_Hours | Mean_AQHI | Median_AQHI | Max_AQHI | Hours_High_Risk | Min_AQHI |
|---|---|---|---|---|---|---|
| HUB | 171 | 2 | 2 | 4 | 0 | 1 |
| Essex | 85 | 3 | 3 | 5 | 0 | 2 |
| Lake_Montebello | 169 | 3 | 3 | 5 | 0 | 2 |
| Piney_Run | 106 | 2 | 2 | 3 | 0 | 1 |
## The highest AQHI value recorded was 5, reached by sensor(s) MOD-00745 - Cedar Heights ( 28 h) and MOD-00746 - HCNR ( 58 h) and MOD-00747 - Turner Station South ( 11 h) and MOD-00748 - Annapolis ( 19 h) and MOD-00749 - HU - Beltsville ( 23 h)| Sensor | Max_AQHI | Hours_at_Max |
|---|---|---|
| MOD-00745 - Cedar Heights | 5 | 28 |
| MOD-00746 - HCNR | 5 | 58 |
| MOD-00747 - Turner Station South | 5 | 11 |
| MOD-00748 - Annapolis | 5 | 19 |
| MOD-00749 - HU - Beltsville | 5 | 23 |
| Station | Pollutant | Mean | Median | MAD | Max (Outlier Check) | Valid Obs |
|---|---|---|---|---|---|---|
| Annapolis | co | 724.63 | 719.66 | 30.78 | 978.68 | 181 |
| Annapolis | no | 2.31 | 2.23 | 0.49 | 4.6 | 181 |
| Annapolis | no2 | 27.70 | 29.72 | 3.75 | 37.49 | 181 |
| Annapolis | o3 | 21.49 | 21.13 | 6.80 | 35.75 | 181 |
| Annapolis | pm1 | 4.43 | 2.62 | 2.18 | 16.78 | 181 |
| Annapolis | pm10 | 23.04 | 8.49 | 7.60 | 531.3 | 181 |
| Annapolis | pm25 | 5.15 | 3.38 | 2.99 | 17.38 | 181 |
| Cedar Heights | co | 746.14 | 744.42 | 55.43 | 968.02 | 181 |
| Cedar Heights | no | 2.19 | 2.13 | 0.40 | 4.29 | 181 |
| Cedar Heights | no2 | 26.90 | 29.07 | 5.72 | 41.96 | 181 |
| Cedar Heights | o3 | 21.93 | 19.98 | 6.81 | 47.48 | 181 |
| Cedar Heights | pm1 | 6.01 | 4.67 | 3.92 | 17.18 | 181 |
| Cedar Heights | pm10 | 10.54 | 9.98 | 6.30 | 42.79 | 181 |
| Cedar Heights | pm25 | 6.54 | 5.31 | 3.66 | 17.64 | 181 |
| HCNR | co | 792.83 | 796.57 | 89.67 | 1061.35 | 181 |
| HCNR | no | 2.71 | 2.45 | 0.68 | 10.25 | 181 |
| HCNR | no2 | 28.24 | 32.22 | 7.58 | 42.2 | 181 |
| HCNR | o3 | 25.54 | 26.24 | 11.24 | 46.04 | 181 |
| HCNR | pm1 | 4.99 | 3.77 | 3.16 | 14.94 | 181 |
| HCNR | pm10 | 21.70 | 13.01 | 9.16 | 312.98 | 181 |
| HCNR | pm25 | 6.01 | 5.12 | 3.83 | 15.49 | 181 |
| HU-Beltsville | co | 706.24 | 709.84 | 30.57 | 830.44 | 181 |
| HU-Beltsville | no | 2.27 | 2.17 | 0.41 | 3.84 | 181 |
| HU-Beltsville | no2 | 22.36 | 24.69 | 7.39 | 38.7 | 181 |
| HU-Beltsville | o3 | 23.87 | 21.65 | 8.41 | 50.2 | 181 |
| HU-Beltsville | pm1 | 5.40 | 3.73 | 3.24 | 19.45 | 181 |
| HU-Beltsville | pm10 | 66.85 | 10.22 | 8.31 | 2779.83 | 181 |
| HU-Beltsville | pm25 | 6.27 | 5.26 | 4.20 | 20.06 | 181 |
| Turner Station South | co | 587.18 | 582.94 | 32.50 | 716.17 | 181 |
| Turner Station South | no | 2.48 | 2.35 | 0.61 | 5.08 | 181 |
| Turner Station South | no2 | 22.99 | 25.52 | 5.67 | 36 | 181 |
| Turner Station South | o3 | 25.83 | 25.80 | 6.53 | 38.87 | 181 |
| Turner Station South | pm1 | 5.61 | 3.74 | 3.00 | 20.6 | 181 |
| Turner Station South | pm10 | 73.63 | 13.52 | 11.99 | 4390.49 | 181 |
| Turner Station South | pm25 | 6.85 | 5.65 | 4.05 | 21.28 | 181 |