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 181 4 4 6 0 2
MOD_00537 - Turner Station North 181 5 4 7 5 3
MOD_00745 - Cedar Heights 181 3 3 6 0 1
MOD_00746 - HCNR 181 3 3 5 0 1
MOD_00747 - Turner Station South 181 4 4 7 2 2
MOD_00748 - Annapolis 181 3 3 7 2 1
MOD_00749 - HU - Beltsville 181 3 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 175 2 2 4 0 1
Essex 0 NaN NA -Inf 0 Inf
Lake_Montebello 175 3 3 4 0 2
Piney_Run 173 2 2 3 0 0
HCNR 162 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 181 384.46 290.37 2102.182 73.93500 2.298865 7.356268 31 89
D11556 181 777.92 544.66 3438.000 137.49000 1.777705 3.181905 77 152
D11559 181 513.58 414.24 3945.390 76.08167 3.590646 19.584464 47 116
D14648 181 900.99 576.97 6015.738 97.06000 2.590727 8.512732 87 158

Concentration Statistics Matrix
Station Pollutant Mean Median MAD Max (Outlier Check) Skew Kurtosis Valid Obs
Annapolis co 742.69 737.95 57.46 928.22 0.28 -0.02 182
Annapolis no 2.06 1.86 0.32 4.12 1.07 0.73 182
Annapolis no2 15.68 12.55 7.99 39.8 0.64 -0.75 182
Annapolis o3 21.06 18.15 14.59 54.5 0.49 -0.91 182
Annapolis pm1 7.98 8.17 2.89 16.56 0.39 0.05 182
Annapolis pm10 13.32 12.51 4.30 33.77 1.10 1.59 182
Annapolis pm25 8.44 8.73 2.76 16.9 0.33 -0.04 182
Cedar Heights co 785.41 763.00 72.84 1082.38 0.49 0.05 182
Cedar Heights no 2.17 1.89 0.46 12.86 6.43 56.20 182
Cedar Heights no2 19.81 18.73 13.79 44.04 0.38 -1.06 182
Cedar Heights o3 21.57 16.92 15.08 54.41 0.53 -0.97 182
Cedar Heights pm1 9.30 9.04 3.05 20.53 0.88 0.98 182
Cedar Heights pm10 14.60 13.46 3.94 35.31 1.52 2.81 182
Cedar Heights pm25 9.72 9.36 3.16 21.23 0.89 0.96 182
Cheverly co 489.20 468.56 60.74 748.83 0.94 0.50 182
Cheverly no 1.95 1.80 0.18 3.77 1.62 3.06 182
Cheverly no2 16.24 13.84 9.76 39.07 0.44 -1.02 182
Cheverly o3 34.40 33.33 15.86 65.48 0.11 -0.99 182
Cheverly pm1 11.94 11.81 3.56 24.24 0.33 0.24 182
Cheverly pm10 20.85 19.32 5.60 44.1 1.06 0.79 182
Cheverly pm25 12.47 12.39 3.80 24.86 0.31 0.18 182
HCNR co 863.67 851.61 100.63 1298.56 0.36 0.71 182
HCNR no 2.95 2.21 0.60 34.79 7.35 68.77 182
HCNR no2 14.58 11.77 6.47 39.68 1.15 0.28 182
HCNR o3 19.30 14.93 15.62 49.16 0.50 -1.09 182
HCNR pm1 8.56 8.52 3.00 15.9 -0.10 -0.58 182
HCNR pm10 16.20 14.85 4.27 47.8 1.94 5.42 182
HCNR pm25 9.25 9.19 3.49 16.32 -0.02 -0.70 182
HU - Beltsville co 744.65 740.49 74.55 1076.96 0.71 1.39 182
HU - Beltsville no 2.15 2.05 0.49 3.39 0.55 -0.74 182
HU - Beltsville no2 14.16 10.80 5.94 41.24 1.24 0.68 182
HU - Beltsville o3 19.40 16.28 21.62 54.71 0.44 -1.11 182
HU - Beltsville pm1 7.95 7.97 3.74 18.86 0.35 -0.07 182
HU - Beltsville pm10 63.50 15.65 5.17 1672.51 5.08 28.77 182
HU - Beltsville pm25 8.91 8.77 3.19 19.15 0.18 -0.27 182
Turner Station North co 505.57 486.67 67.92 741.11 0.64 0.10 182
Turner Station North no 2.05 1.86 0.23 7.56 4.48 30.98 182
Turner Station North no2 15.53 13.27 9.40 37.71 0.51 -1.00 182
Turner Station North o3 39.70 39.94 12.08 57.85 -0.19 -0.94 182
Turner Station North pm1 13.66 13.75 6.27 25.88 0.13 -0.97 182
Turner Station North pm10 22.64 22.32 5.53 51.59 0.75 1.67 182
Turner Station North pm25 14.41 14.57 5.84 26.89 0.11 -0.89 182
Turner Station South co 621.99 603.24 58.18 880.74 0.79 0.87 181
Turner Station South no 2.19 1.84 0.37 10.98 4.68 34.21 181
Turner Station South no2 15.30 12.45 9.20 39.8 0.65 -0.64 181
Turner Station South o3 30.24 28.60 12.84 53.56 0.24 -1.03 181
Turner Station South pm1 8.61 8.83 2.66 17.82 0.17 0.23 182
Turner Station South pm10 22.07 19.91 7.08 59.74 1.46 2.63 182
Turner Station South pm25 9.17 9.40 2.59 18.68 0.13 0.34 182