Air Quality in Merrillville, United States

Windy
23.7°C · 48.9% humidity
23.7°
Feels 23.7°
33
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast
27 11pm
27
27
33 2am
31
37
36 5am
36
35
26 8am
26
25
25 11am
25
27
27 2pm
27
34
34 5pm
27
27
34 8pm
34
34
AD 728×90

Air Quality Index Trend

45h · 158 stn

Merrillville's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

48.9%
Humidity
61.0 km/h
Wind NNE
1018.8 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
33
7.9 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Merrillville?

Temperature & Precipitation

PM2.5 Trend

45h · 158 stations
PM2.57.9 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (1 station within 25 km)
7.9
Median
7.9
Average
7.9
Low
7.9
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +2.1

What is the 7-day forecast for Merrillville?

08-03
23.7° 17.0°
10.69 mm
08-04
34.3° 17.9°
0.38 mm
08-05
31.6° 17.3°
1.63 mm
08-06
34.8° 22.0°
0.88 mm
08-07
31.0° 18.2°
08-08
33.8° 17.6°
2.06 mm
08-09
34.2° 22.6°
0.38 mm
Both models agree Avg diff: 3.8°C

Where are air quality stations near Merrillville?

122
Hammond-167th St, Indiana, USA
18.3 km PM2.5: 44.0 µg/m³
13
Ogden Dunes, Indiana, USA
18.7 km PM2.5: 3.1 µg/m³
46
East Chicago - Marina, Indiana, USA
20.8 km PM2.5: 11.0 µg/m³
50
Kingery Near-road #1, Illinois, USA
21.5 km PM2.5: 12.0 µg/m³
51
Kingery Near-road #1, Illinois, USA
21.5 km PM2.5: 12.1 µg/m³
50
Kingery Near-road #1, Illinois, USA
21.5 km PM2.5: 12.0 µg/m³
51
Kingery Near-road #1, Illinois, USA
21.5 km PM2.5: 12.1 µg/m³
54
Hegewisch 3
25.3 km PM2.5: 13.4 µg/m³
51
Hegewisch 4
26.1 km PM2.5: 12.2 µg/m³
53
Hegewisch 2
26.5 km PM2.5: 13.1 µg/m³

What cities are near Merrillville?

33 Crown Point 42 Hobart 33 Griffith 33 Schererville 33 Gary 33 Highland 33 Dyer 36 Portage 33 Munster 33 Hammond
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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 2026-08-08T07:24 UTC.