*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 735 4 3 6 0 2
MOD_00537 - Turner Station North 735 4 4 8 19 2
MOD_00745 - Cedar Heights 735 4 3 7 26 1
MOD_00746 - HCNR 735 2 2 5 0 1
MOD_00747 - Turner Station South 735 3 3 7 7 1
MOD_00748 - Annapolis 735 3 3 7 4 1
MOD_00749 - HU - Beltsville 735 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 716 2 2 5 0 1
Essex 0 NaN NA -Inf 0 Inf
Lake_Montebello 728 3 3 5 0 1
Piney_Run 463 2 2 4 0 0
HCNR 712 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 by Location

Howard U. (HUB) - Regulatory

Lake Montebello - Regulatory

Piney Run - Regulatory

HCNR - Hybrid Regulatory

Summary Statistics for MetOne Sensors (880nm)
Monitor 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 612 126.34 94.40 737.6559 35.54068 2.595350 9.781972 3 0.5 18 2.9 612 100
D11556 738 746.59 617.76 9088.3000 108.32500 4.813687 48.753375 383 51.9 580 78.6 738 100
D11559 738 456.89 356.85 2317.2283 87.67667 1.921982 5.853929 197 26.7 405 54.9 738 100
D14645 719 932.87 614.26 11722.6350 115.14833 4.113526 30.814888 373 51.9 554 77.1 719 100
D14648 670 803.29 606.01 10538.7550 97.90167 4.665922 40.574827 337 50.3 514 76.7 670 100

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 780.92 759.12 76.60 1208.36 1.19 1.98 735
Annapolis no 2.00 1.84 0.34 4.78 1.35 1.76 735
Annapolis no2 13.75 10.23 7.41 42.26 0.94 -0.31 735
Annapolis o3 21.83 20.03 16.18 53.49 0.37 -0.93 735
Annapolis pm1 6.12 5.42 2.74 15.99 0.72 -0.02 739
Annapolis pm10 11.04 10.79 3.43 28.69 0.68 1.15 739
Annapolis pm25 6.60 5.93 2.72 16.57 0.73 0.03 739
Cedar Heights co 821.61 808.32 102.34 1940.84 1.91 11.60 735
Cedar Heights no 2.11 1.87 0.38 9.42 3.34 23.48 735
Cedar Heights no2 17.46 13.55 10.66 51.04 0.64 -0.76 735
Cedar Heights o3 21.71 18.82 15.87 55.68 0.43 -0.92 735
Cedar Heights pm1 8.30 7.72 4.41 55.43 2.97 25.94 739
Cedar Heights pm10 13.10 12.17 4.79 100.24 4.88 52.51 739
Cedar Heights pm25 8.74 8.13 4.49 56.03 3.01 26.37 739
Cheverly co 522.01 496.94 76.11 1288.13 1.92 6.51 736
Cheverly no 2.08 1.87 0.24 20.6 13.99 274.47 736
Cheverly no2 13.85 11.11 7.99 42.46 0.70 -0.68 736
Cheverly o3 36.22 35.69 14.07 68.99 0.13 -0.83 736
Cheverly pm1 10.18 9.71 4.88 34.33 0.62 0.66 739
Cheverly pm10 20.19 18.71 6.20 94.61 2.41 12.92 739
Cheverly pm25 10.75 10.23 4.83 34.86 0.62 0.70 739
HCNR co 856.44 840.47 99.26 1527.95 0.84 2.21 736
HCNR no 2.28 1.99 0.44 13.23 5.11 36.37 736
HCNR no2 12.12 8.91 5.53 47.28 1.33 0.96 736
HCNR o3 19.69 15.93 15.29 51.25 0.47 -1.10 736
HCNR pm1 6.82 6.02 3.31 18.21 0.72 -0.08 739
HCNR pm10 14.76 14.45 4.64 52.81 1.71 7.34 739
HCNR pm25 7.52 6.66 3.22 18.58 0.71 -0.08 739
HU - Beltsville co 754.92 754.05 77.50 1826.91 3.18 39.00 736
HU - Beltsville no 2.06 1.89 0.32 3.81 0.90 -0.04 736
HU - Beltsville no2 12.70 10.26 6.09 43.31 1.38 1.23 736
HU - Beltsville o3 19.84 15.00 18.38 58.04 0.53 -1.02 736
HU - Beltsville pm1 6.63 5.90 3.44 17.68 0.61 -0.30 739
HU - Beltsville pm10 19.04 15.11 5.77 304.49 6.83 78.00 739
HU - Beltsville pm25 7.42 6.63 3.33 18.42 0.62 -0.18 739
Turner Station North co 536.30 517.85 81.05 1016.19 1.09 1.51 736
Turner Station North no 2.00 1.85 0.34 4.18 1.26 1.60 736
Turner Station North no2 13.07 10.99 7.70 47.66 1.00 0.32 736
Turner Station North o3 38.05 38.41 12.37 62.05 0.05 -0.93 736
Turner Station North pm1 11.40 10.09 5.17 42.16 0.97 1.93 739
Turner Station North pm10 19.71 18.61 5.86 59.55 1.26 3.13 739
Turner Station North pm25 12.17 10.76 4.90 43.51 1.01 2.15 739
Turner Station South co 652.08 633.68 74.51 1371.05 2.20 10.62 736
Turner Station South no 2.07 1.83 0.40 5.6 1.80 4.19 736
Turner Station South no2 13.72 10.70 8.16 47.39 0.87 -0.33 736
Turner Station South o3 28.97 27.58 13.70 54.97 0.27 -0.97 736
Turner Station South pm1 6.82 6.13 3.22 19.88 0.76 0.39 739
Turner Station South pm10 22.60 20.08 7.68 117.1 3.00 13.39 739
Turner Station South pm25 7.49 6.80 3.06 21.19 0.82 0.63 739

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.