Air Quality in Ellicott City, United States

Drizzle
21.6°C · 48.5% humidity
21.6°
Feels 21.6°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
27 3pm
25
25
40 6pm
36
35
33 9pm
31
28
27 12am
25
25
25 3am
25
24
24 6am
24
24
24 9am
24
24
24 12pm
24
24
AD 728×90

Air Quality Index Trend

47h · 4 stn

Ellicott City's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Ellicott City is 1.9× the WHO annual guideline of 5 µg/m³.

48.5%
Humidity
14.4 km/h
Wind NW
1019.7 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
40
9.69 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Ellicott City?

Temperature & Precipitation

PM2.5 Trend

47h · 4 stations
PM2.59.69 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (2 stations within 25 km)
9.69
Median
9.1
Average
7.9
Low
10.3
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -3.7

What is the 7-day forecast for Ellicott City?

05-28
27.5° 20.8°
1.0 mm
05-29
22.6° 11.7°
2.63 mm
05-30
26.2° 13.1°
14.25 mm
05-31
30.1° 12.4°
06-01
30.0° 15.0°
4.56 mm
06-02
25.6° 15.7°
06-03
27.0° 19.7°
4.81 mm
Both models agree Avg diff: 4.7°C

Where are air quality stations near Ellicott City?

43
Howard County Near Road, Maryland, USA
14.4 km PM2.5: 10.3 µg/m³
26
Howard County Near Road, Maryland, USA
14.4 km PM2.5: 6.2 µg/m³
48
HU-Beltsville, Maryland, USA
24.6 km PM2.5: 11.5 µg/m³
58
Padonia, Maryland, USA
26.0 km PM2.5: 15.4 µg/m³

What cities are near Ellicott City?

40 Ilchester 41 Columbia 39 Catonsville 39 Arbutus 37 Woodlawn 40 West Elkridge 36 Milford Mill 40 Elkridge 37 Hanover 36 Lochearn
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-28T22:54 UTC.