Air Quality in Merrillville, United States
Partly Cloudy
23.6°C · 67.9% humidity
23.6°
Feels 23.6°
47
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations
Nearby Monitoring Stations
AQI Forecast
25
2pm
25
25
47
5pm
41
36
35
8pm
33
31
30
11pm
29
27
28
2am
55
67
83
5am
83
66
54
8am
54
83
84
11am
146
146
Air Quality Index Trend
47h · 4 stnMerrillville's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
67.9%
Humidity
38.9 km/h
Wind NNE
1014.2 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
11.23 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Merrillville?
Temperature & Precipitation
PM2.5 Trend
47h · 4 stationsPM2.511.23 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
Station readings (6 stations within 25 km)
11.23
Median
11.58
Average
5.5
Low
15.4
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -4.1
What is the 7-day forecast for Merrillville?
07-21
27.5° 21.6°
1.69 mm
07-22
25.0° 19.9°
07-23
23.3° 16.1°
6.56 mm
07-24
26.7° 15.7°
07-25
22.9° 16.8°
0.19 mm
07-26
27.0° 19.8°
3.13 mm
07-27
25.1° 20.6°
0.88 mm
Both models agree
Avg diff: 3.5°C
Where are air quality stations near Merrillville?
34
Hammond-167th St, Indiana, USA
58
Hegewisch 3
60
Hegewisch 4
55
Hegewisch 2
60
Hegewisch 5
58
Hegewisch 6
58
Hegewisch 1
74
South Deering 6
58
East Side 4
59
Washington HS Collocation 1
What cities are near Merrillville?
Get AQI alerts for Merrillville
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T22:04 UTC.