*BC (black carbon) has been used in the AQHI calculation when available; BC data not available at all sites and times. 
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):

Environment and Climate Change Canada’s Air Quality Health Index (AQHI) is a reliable guide to daily health risks, made stronger by the addition of black carbon data. While the AQHI+ successfully captures common and immediate threats to human health, no single index is exhaustive for all toxic substances or localized pollutants. Due to compounding health disparities and socio-environmental stressors, the reported AQHI+ represents a conservative baseline; the actual risk to residents in the tracts mentioned above is likely higher than this index alone suggests.

MDEnviroScreen Map

Spatial distribution of overburdened communities via MDEnviroScreen.

AQHI Summary for All ARP Grant-funded Modulair Sensors (BC Adjusted)
Sensor Total_Hours Mean_AQHI Median_AQHI Max_AQHI Hours_High_Risk Min_AQHI
MOD_00536 - Cheverly 737 4 3 6 0 2
MOD_00537 - Turner Station North 737 4 4 8 19 2
MOD_00745 - Cedar Heights 737 4 3 7 26 1
MOD_00746 - HCNR 737 2 2 5 0 1
MOD_00747 - Turner Station South 737 4 3 7 7 1
MOD_00748 - Annapolis 737 3 3 7 4 1
MOD_00749 - HU - Beltsville 737 2 2 6 0 0
AQHI Summary at MDE Regulatory Monitors*
Monitor Total_Hours Mean_AQHI Median_AQHI Max_AQHI Hours_High_Risk Min_AQHI
HUB 720 2 2 5 0 1
Essex 0 NaN NA -Inf 0 Inf
Lake_Montebello 726 3 3 5 0 1
Piney_Run 464 2 2 4 0 0
HCNR 711 4 3 6 0 1
*HCNR statistics are a hybrid of regulatory monitor data (PM2.5 & NO2) and sensor data (O3). All regulatory data is preliminary 

The highest AQHI value recorded was 8, reached by sensor(s) MOD_00537 - Turner Station North ( 1 h)

Highest AQHI Sensor(s) and Hours at Maximum
Sensor Max_AQHI Hours_at_Max
MOD_00537 - Turner Station North 8 1

Modulair Time Variation by Location

Cheverly

Turner Station North

Cedar Heights

HCNR

Turner Station South

Annapolis

HU - Beltsville

Regulatory Time Variation Chunk

Regulatory Time Variation by Location

Howard U. (HUB) - Regulatory

Lake Montebello - Regulatory

Piney Run - Regulatory

HCNR - Hybrid Regulatory

Summary Statistics for MetOne Sensors (880nm)
Sensor Total Hours Mean 880 Median 880 Max 880 Min 880 Skew Kurtosis #Hours ≥600 %Hours ≥600 #Hours ≥330 %Hours ≥330 #Hours ≥33 %Hours ≥33
B19939 615 127.44 96.70 737.6559 35.54068 2.617082 10.002848 3 0.5 18 2.9 615 100
D11556 741 746.71 617.42 9088.3000 108.32500 4.848459 49.399458 384 51.8 584 78.8 741 100
D11559 740 460.06 361.34 2317.2283 87.67667 1.937286 5.978075 197 26.6 413 55.8 740 100
D14645 722 943.08 619.28 11722.6350 115.14833 4.142798 30.737727 378 52.4 568 78.7 722 100
D14648 673 802.49 606.66 10538.7550 97.90167 4.743472 41.805104 339 50.4 518 77.0 673 100

Polar Plots by Location

Cheverly

Turner Station North

Cedar Heights

HCNR

Turner Station South

Annapolis

HU - Beltsville

Ratio Polar Plots by Location

Cheverly

PM1 / PM2.5

PM2.5 / PM10

BC / PM2.5

NO2 / NO

Turner Station North

PM1 / PM2.5

PM2.5 / PM10

BC / PM2.5

NO2 / NO

Cedar Heights

PM1 / PM2.5

PM2.5 / PM10

BC / PM2.5

NO2 / NO

HCNR

PM1 / PM2.5

PM2.5 / PM10

NO2 / NO

Turner Station South

PM1 / PM2.5

PM2.5 / PM10

BC / PM2.5

NO2 / NO

Annapolis

PM1 / PM2.5

PM2.5 / PM10

BC / PM2.5

NO2 / NO

HU - Beltsville

PM1 / PM2.5

PM2.5 / PM10

NO2 / NO

Concentration Statistics Matrix; red highlighting =/>6x MAD; fog filter applied to PM2.5 & PM10 data
Station Pollutant Mean Median MAD Max (Outlier Check) Skew Kurtosis Valid Obs
Annapolis co 782.12 760.17 75.43 1208.36 1.20 2.04 737
Annapolis no 2.00 1.83 0.34 4.78 1.35 1.67 737
Annapolis no2 13.90 10.57 7.87 42.26 0.91 -0.36 737
Annapolis o3 21.77 19.92 16.30 53.49 0.38 -0.94 737
Annapolis pm1 6.10 5.42 2.76 15.99 0.71 -0.04 741
Annapolis pm10 11.20 10.84 3.51 28.69 0.98 2.10 741
Annapolis pm25 6.59 5.96 2.76 16.57 0.71 0.01 741
Cedar Heights co 823.86 810.66 99.03 1940.84 1.92 11.73 737
Cedar Heights no 2.10 1.87 0.37 9.42 3.35 23.50 737
Cedar Heights no2 17.54 13.69 10.47 51.04 0.65 -0.73 737
Cedar Heights o3 21.58 18.60 15.67 55.68 0.45 -0.90 737
Cedar Heights pm1 8.32 7.74 4.48 55.43 2.96 25.85 741
Cedar Heights pm10 13.18 12.27 4.83 100.24 4.90 52.89 741
Cedar Heights pm25 8.77 8.23 4.49 56.03 3.00 26.34 741
Cheverly co 523.87 499.91 73.87 1288.13 1.95 6.75 738
Cheverly no 2.08 1.86 0.22 20.6 14.07 276.82 738
Cheverly no2 14.15 11.47 8.59 42.46 0.64 -0.76 738
Cheverly o3 36.13 35.54 14.19 68.99 0.15 -0.83 738
Cheverly pm1 10.20 9.74 4.92 34.33 0.61 0.67 741
Cheverly pm10 20.29 18.73 6.20 94.61 2.41 12.75 741
Cheverly pm25 10.78 10.26 4.87 34.86 0.63 0.71 741
HCNR co 858.25 842.14 98.05 1527.95 0.85 2.26 738
HCNR no 2.28 1.98 0.43 13.23 5.04 35.59 738
HCNR no2 12.21 9.23 5.63 47.28 1.31 0.90 738
HCNR o3 19.52 15.79 15.03 51.25 0.50 -1.05 738
HCNR pm1 6.84 6.03 3.31 18.21 0.72 -0.08 741
HCNR pm10 14.95 14.59 4.72 52.81 1.69 6.72 741
HCNR pm25 7.56 6.69 3.22 18.58 0.71 -0.08 741
HU - Beltsville co 755.54 751.54 73.50 1826.91 3.28 40.53 738
HU - Beltsville no 2.06 1.88 0.31 3.81 0.94 0.03 738
HU - Beltsville no2 12.67 10.30 6.06 43.31 1.40 1.31 738
HU - Beltsville o3 19.58 14.99 18.39 58.04 0.55 -0.99 738
HU - Beltsville pm1 6.64 6.00 3.51 17.68 0.61 -0.30 741
HU - Beltsville pm10 19.37 15.22 5.86 304.49 6.67 75.52 741
HU - Beltsville pm25 7.46 6.70 3.33 18.42 0.62 -0.16 741
Turner Station North co 537.31 517.85 79.54 1016.19 1.12 1.59 738
Turner Station North no 1.99 1.85 0.33 4.18 1.27 1.62 738
Turner Station North no2 13.14 11.07 7.59 47.66 0.99 0.32 738
Turner Station North o3 37.99 38.24 12.11 62.05 0.07 -0.89 738
Turner Station North pm1 11.41 10.08 5.05 42.16 0.99 1.98 741
Turner Station North pm10 19.85 18.76 5.93 59.55 1.23 3.01 741
Turner Station North pm25 12.20 10.81 4.87 43.51 1.02 2.22 741
Turner Station South co 651.96 633.27 73.90 1371.05 2.23 10.78 738
Turner Station South no 2.06 1.82 0.39 5.6 1.86 4.55 738
Turner Station South no2 13.79 10.75 8.09 47.39 0.86 -0.35 738
Turner Station South o3 28.88 27.40 13.11 54.97 0.30 -0.92 738
Turner Station South pm1 6.82 6.12 3.14 19.88 0.77 0.41 741
Turner Station South pm10 22.87 20.22 7.77 117.1 2.90 12.75 741
Turner Station South pm25 7.50 6.81 3.04 21.19 0.81 0.65 741

Submit An Air Pollution Complaint

MDE’s Air Quality Compliance Program investigates concerns of dust, odor, smoke, open burning, and unpermitted emissions.

Complaints may be submitted to mdeair.complaints@maryland.gov or (410) 537-3215.

When submitting a complaint, please include: * Your name and contact information (phone number or email address); * The county you are calling about; * A brief description of your concern with an address.

Concerns related to agricultural issues can be directed to the Maryland Department of Agriculture at 410-841-5700.

Concerns related to vehicle emissions are dealt with by the Maryland Department’s Air Quality Mobile Sources Program at 410-537-3270.

Note: MDE does not regulate indoor air or mold.