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):

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.

MDEnviroScreen Map

Spatial distribution of overburdened communities via MDEnviroScreen.

AQHI Summary for All ARP Grant-funded Modulair Sensors (Adjusted Matrix)
Sensor Total_Hours Mean_AQHI Median_AQHI Max_AQHI Hours_High_Risk Min_AQHI
MOD_00536 - Cheverly 187 4 4 6 0 2
MOD_00537 - Turner Station North 188 4 4 7 5 2
MOD_00745 - Cedar Heights 188 3 3 6 0 1
MOD_00746 - HCNR 188 2 2 5 0 1
MOD_00747 - Turner Station South 188 4 4 7 2 2
MOD_00748 - Annapolis 188 3 3 7 2 1
MOD_00749 - HU - Beltsville 188 2 2 6 0 1
AQHI Summary at MDE Regulatory Monitors*
Monitor Total_Hours Mean_AQHI Median_AQHI Max_AQHI Hours_High_Risk Min_AQHI
HUB 182 2 2 4 0 1
Essex 0 NaN NA -Inf 0 Inf
Lake_Montebello 182 3 3 4 0 1
Piney_Run 172 2 2 3 0 0
HCNR 169 3 3 5 0 1
*HCNR statistics are a hybrid of regulatory monitor data (PM2.5 & NO2) and sensor data (O3). 

The highest AQHI value recorded was 7, reached by sensor(s) MOD_00537 - Turner Station North ( 5 h) and MOD_00747 - Turner Station South ( 2 h) and MOD_00748 - Annapolis ( 2 h)

Highest AQHI Sensor(s) and Hours at Maximum
Sensor Max_AQHI Hours_at_Max
MOD_00537 - Turner Station North 7 5
MOD_00747 - Turner Station South 7 2
MOD_00748 - Annapolis 7 2

Summary Statistics for MetOne Sensors (880nm)
Monitor Total_Hours Mean_880 Median_880 Max_880 Min_880 Skew Kurtosis Hours_Above_600 Hours_Above_300
B19939 187 397.15 320.61 2102.182 73.93500 2.226222 7.263025 33 101
D11556 188 777.81 566.04 3438.000 90.35000 1.773139 3.338466 82 162
D11559 188 516.11 423.91 3945.390 19.74167 3.608280 20.231521 50 125
D14648 188 870.84 568.50 6015.738 97.06000 2.740562 9.706836 88 163

Concentration Statistics Matrix
Station Pollutant Mean Median MAD Max (Outlier Check) Skew Kurtosis Valid Obs
Annapolis co 743.47 740.97 58.86 928.22 0.23 -0.06 189
Annapolis no 2.02 1.82 0.27 4.12 1.17 0.96 189
Annapolis no2 15.03 12.02 6.99 39.8 0.82 -0.44 189
Annapolis o3 19.58 15.50 13.13 54.5 0.65 -0.80 189
Annapolis pm1 7.51 8.09 3.29 16.56 0.19 -0.40 189
Annapolis pm10 13.34 12.46 4.23 33.77 1.04 1.26 189
Annapolis pm25 8.00 8.61 3.27 16.9 0.22 -0.46 189
Cedar Heights co 778.89 761.05 77.01 1082.38 0.57 0.02 189
Cedar Heights no 2.13 1.81 0.38 12.86 6.42 56.52 189
Cedar Heights no2 18.80 15.84 10.68 44.04 0.56 -0.80 189
Cedar Heights o3 19.67 13.71 14.01 54.41 0.66 -0.86 189
Cedar Heights pm1 8.76 8.97 3.51 20.53 0.42 0.26 189
Cedar Heights pm10 14.22 12.85 3.61 35.31 1.43 2.81 189
Cedar Heights pm25 9.17 9.26 3.57 21.23 0.47 0.26 189
Cheverly co 483.61 464.10 66.29 748.83 0.91 0.40 188
Cheverly no 1.92 1.77 0.18 3.77 1.78 3.89 188
Cheverly no2 15.06 11.70 7.70 39.07 0.70 -0.71 188
Cheverly o3 32.75 30.09 15.67 65.48 0.33 -0.97 188
Cheverly pm1 11.07 11.59 4.39 24.24 0.06 -0.34 188
Cheverly pm10 20.94 19.55 5.93 47.24 0.95 0.88 188
Cheverly pm25 11.59 12.03 4.60 24.86 0.07 -0.37 188
HCNR co 841.73 832.12 102.87 1298.56 0.51 0.85 189
HCNR no 2.81 2.10 0.47 34.79 7.54 71.80 189
HCNR no2 13.77 11.51 5.28 39.68 1.50 1.55 189
HCNR o3 18.09 13.96 15.44 49.16 0.58 -1.00 189
HCNR pm1 7.99 8.31 4.61 15.9 -0.09 -0.97 189
HCNR pm10 16.46 14.67 4.42 66.19 2.60 9.65 189
HCNR pm25 8.68 8.92 4.63 16.32 -0.03 -0.99 189
HU - Beltsville co 738.29 731.77 86.52 1076.96 0.74 1.17 189
HU - Beltsville no 2.16 2.11 0.51 3.39 0.49 -0.68 189
HU - Beltsville no2 13.09 10.74 4.69 41.24 1.58 2.10 189
HU - Beltsville o3 17.47 12.21 19.66 54.71 0.59 -0.98 189
HU - Beltsville pm1 7.32 7.69 4.41 18.86 0.29 -0.48 189
HU - Beltsville pm10 65.59 15.72 5.64 1672.51 5.11 29.41 189
HU - Beltsville pm25 8.26 8.64 4.36 19.15 0.13 -0.69 189
Turner Station North co 500.48 481.95 70.86 741.11 0.68 0.05 189
Turner Station North no 1.99 1.84 0.24 4.64 2.21 7.03 189
Turner Station North no2 15.20 12.58 8.45 37.71 0.62 -0.80 189
Turner Station North o3 38.69 38.76 12.31 57.85 -0.06 -1.09 189
Turner Station North pm1 13.10 13.69 6.52 25.88 -0.13 -0.90 189
Turner Station North pm10 21.68 21.92 5.59 51.59 0.60 1.52 189
Turner Station North pm25 13.83 14.49 6.19 26.89 -0.12 -0.89 189
Turner Station South co 617.92 601.68 59.32 880.74 0.80 0.80 188
Turner Station South no 2.14 1.82 0.35 10.98 4.74 34.88 188
Turner Station South no2 14.85 12.19 8.48 39.8 0.79 -0.40 188
Turner Station South o3 29.13 27.73 14.16 53.56 0.34 -1.06 188
Turner Station South pm1 8.07 8.75 2.86 17.82 -0.06 -0.34 189
Turner Station South pm10 21.43 19.55 6.75 78.96 2.00 6.25 189
Turner Station South pm25 8.65 9.29 2.94 18.68 -0.05 -0.21 189