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 10531 4 4 10 61 1
MOD_00537 - Turner Station North 10392 4 4 10 265 1
MOD_00733 196 2 2 4 0 2
MOD_00745 - Cedar Heights 9454 4 4 10 99 1
MOD_00746 - HCNR 6144 4 4 6 0 1
MOD_00747 - Turner Station South 12394 4 4 8 51 1
MOD_00748 - Annapolis 10170 3 3 7 15 0
MOD_00749 - HU - Beltsville 5153 3 3 7 7 0
MOD_00760 4819 3 3 8 47 0
MOD_00824 - Curtis Bay 2675 3 3 5 0 1
AQHI Summary at MDE Regulatory Monitors*
Monitor Total_Hours Mean_AQHI Median_AQHI Max_AQHI Hours_High_Risk Min_AQHI
HUB 12194 2 2 5 0 0
Essex 0 NaN NA -Inf 0 Inf
Lake_Montebello 8686 3 3 7 2 1
Piney_Run 12196 2 2 6 0 0
HCNR 5769 3 3 6 0 1
*HCNR statistics are a hybrid of regulatory monitor data (PM2.5 & NO2) and sensor data (O3). 

The highest AQHI value recorded was 10, reached by sensor(s) MOD_00536 - Cheverly ( 2 h) and MOD_00537 - Turner Station North ( 5 h) and MOD_00745 - Cedar Heights ( 1 h)

Highest AQHI Sensor(s) and Hours at Maximum
Sensor Max_AQHI Hours_at_Max
MOD_00536 - Cheverly 10 2
MOD_00537 - Turner Station North 10 5
MOD_00745 - Cedar Heights 10 1

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 9067 301.15 222.57 6794.342 0.00000 3.504606 33.65417 1114 3327
C14446 2337 410.12 250.42 6214.768 27.43333 3.736049 22.54607 422 1005
D11556 10349 513.04 327.97 13107.623 0.00000 4.437863 41.11164 2893 5486
D11559 10973 315.70 198.41 10652.652 0.00000 5.336751 64.24785 1598 3902
D14645 11483 730.25 438.46 10757.428 0.00000 3.012078 14.99163 4476 7406
D14648 11936 587.28 373.12 18113.942 0.00000 6.354909 89.76633 3645 7176
D14780 1255 140.94 0.00 5184.350 0.00000 4.840814 36.92492 100 203
D14781 9124 488.36 314.95 11284.238 0.00000 3.998700 31.46553 2237 4762

Concentration Statistics Matrix
Station Pollutant Mean Median MAD Max (Outlier Check) Skew Kurtosis Valid Obs
Annapolis co 767.50 740.15 57.23 1783.25 2.54 10.50 10217
Annapolis no 2.63 2.19 0.52 191.71 22.65 669.44 10038
Annapolis no2 21.53 25.07 8.49 51.6 -0.43 -1.09 10217
Annapolis o3 22.04 20.88 12.13 67.68 0.46 -0.20 10217
Annapolis pm1 4.70 3.62 2.69 80.17 3.29 38.11 10344
Annapolis pm10 14.08 9.62 5.96 6943.32 65.62 5253.95 10344
Annapolis pm25 5.31 4.30 3.04 81.52 3.04 33.17 10344
Cedar Heights co 797.32 762.63 77.34 2425.91 2.46 11.66 8767
Cedar Heights no 2.61 2.19 0.49 108.92 15.22 286.45 8763
Cedar Heights no2 22.67 26.02 8.03 51.46 -0.46 -0.89 8767
Cedar Heights o3 21.65 19.75 13.41 72.06 0.56 -0.18 8767
Cedar Heights pm1 6.74 5.47 3.83 142.65 6.21 99.40 8837
Cedar Heights pm10 14.97 11.35 6.18 2517.95 34.57 1356.29 8837
Cedar Heights pm25 7.26 6.00 4.01 144.95 6.03 95.32 8837
Cheverly co 498.41 459.41 65.10 1919.86 2.93 12.97 10631
Cheverly no 3.14 2.12 0.44 220.72 12.52 198.38 10600
Cheverly no2 18.27 20.26 8.93 52.11 -0.15 -0.93 10631
Cheverly o3 32.88 32.20 11.56 74.18 0.39 -0.09 10631
Cheverly pm1 8.00 6.54 4.72 114.3 4.48 54.19 10622
Cheverly pm10 18.84 13.73 9.37 4376.43 40.66 1983.99 10622
Cheverly pm25 8.51 7.06 4.89 115.96 4.37 52.40 10622
Curtis Bay co 721.89 654.25 71.30 4432.01 6.11 73.89 3227
Curtis Bay no 2.99 2.41 0.42 79.82 12.98 210.09 3227
Curtis Bay no2 10.51 10.16 3.83 27.81 0.77 0.63 3227
Curtis Bay o3 37.85 38.19 9.07 75.05 -0.21 0.05 3227
Curtis Bay pm1 3.74 2.06 2.58 27.54 1.79 3.79 2680
Curtis Bay pm10 10.52 3.83 4.90 276.88 3.80 26.69 2680
Curtis Bay pm25 4.08 2.43 2.91 30.63 1.69 3.24 2680
HCNR co 790.68 766.66 80.33 2050.87 1.46 5.96 6145
HCNR no 2.95 2.33 0.62 70.09 9.26 132.24 6145
HCNR no2 26.21 29.77 8.83 48.48 -0.61 -0.84 6145
HCNR o3 24.06 23.86 13.05 58.49 0.21 -0.62 6145
HCNR pm1 5.05 3.97 2.99 25.81 1.25 1.58 6150
HCNR pm10 21.04 10.74 6.58 3868.74 23.64 678.57 6150
HCNR pm25 5.72 4.59 3.32 27.21 1.23 1.50 6150
HU - Beltsville co 739.00 720.92 56.88 1199.57 1.49 3.74 5155
HU - Beltsville no 2.42 2.23 0.51 15.35 3.96 34.01 5155
HU - Beltsville no2 20.19 22.72 8.50 51.75 -0.19 -0.98 5155
HU - Beltsville o3 20.32 18.67 13.04 69.83 0.67 0.17 5155
HU - Beltsville pm1 5.19 4.06 3.03 52.72 1.69 6.43 5158
HU - Beltsville pm10 29.54 9.88 6.35 2912.87 12.14 167.87 5158
HU - Beltsville pm25 5.82 4.67 3.37 54.16 1.54 5.30 5158
MOD_00733 co 1089.64 1038.37 98.35 4502.59 4.96 66.82 1900
MOD_00733 no 2.70 2.11 0.46 68.46 10.99 135.12 1900
MOD_00733 no2 18.83 21.49 4.79 46.16 -0.62 -0.67 1900
MOD_00733 o3 29.66 29.86 7.01 98.9 0.70 4.87 1900
MOD_00733 pm1 1.32 0.36 0.30 52.68 7.62 63.36 197
MOD_00733 pm10 2.85 0.48 0.39 183.93 9.81 109.36 197
MOD_00733 pm25 1.66 0.38 0.31 56.21 6.51 44.66 197
MOD_00760 co 825.45 800.28 77.86 1650.69 1.54 4.10 4818
MOD_00760 no 2.44 2.10 0.45 120.53 19.60 450.45 4818
MOD_00760 no2 25.26 28.86 12.48 54.46 -0.30 -1.19 4818
MOD_00760 o3 18.10 16.50 17.77 84.48 0.47 -0.15 4818
MOD_00760 pm1 6.81 5.12 4.12 118.69 3.36 35.28 4824
MOD_00760 pm10 19.99 16.24 9.95 1536.49 37.65 2043.29 4824
MOD_00760 pm25 7.85 6.32 4.70 120.46 3.10 32.17 4824
Turner Station North co 516.66 485.37 58.54 1434.11 2.59 9.87 10413
Turner Station North no 2.87 2.21 0.51 183.9 15.84 338.08 10413
Turner Station North no2 18.39 20.48 8.66 46.44 -0.18 -1.11 10413
Turner Station North o3 34.61 33.42 9.19 128.17 0.68 1.41 10413
Turner Station North pm1 13.65 9.39 7.47 151.92 2.63 11.13 10404
Turner Station North pm10 25.32 19.46 12.35 2202.2 27.91 1282.11 10404
Turner Station North pm25 14.43 10.19 7.67 153.69 2.60 11.07 10404
Turner Station South co 626.86 603.40 52.05 2145.74 3.02 17.91 12428
Turner Station South no 2.86 2.24 0.59 149.4 16.47 329.82 12368
Turner Station South no2 19.04 21.63 9.83 51.08 -0.20 -1.21 12428
Turner Station South o3 28.43 27.22 9.79 79.2 0.65 0.56 12428
Turner Station South pm1 5.26 4.10 2.96 78.81 2.24 17.40 12488
Turner Station South pm10 22.98 13.70 8.98 5084.11 27.68 945.84 12488
Turner Station South pm25 6.06 4.95 3.39 80.51 2.04 14.58 12488