Air Quality in Merrillville, United States

Clear
22.4°C · 46.1% humidity
22.4°
Feels 22.4°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
27 7am
54
54
19 10am
29
36
41 1pm
45
47
29 4pm
31
25
23 7pm
53
53
33 10pm
34
34
34 1am
34
34
34 4am
27
34
AD 728×90

Air Quality Index Trend

45h · 213 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.

46.1%
Humidity
28.4 km/h
Wind N
1019.9 hPa
Pressure
9.4
UV Very High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
19
4.61 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Merrillville?

Temperature & Precipitation

PM2.5 Trend

45h · 213 stations
PM2.54.61 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX9.4
Very High
AD 300×250
Station readings (2 stations within 25 km)
4.61
Median
4.55
Average
4.1
Low
5.0
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +6.2
Both models agree Avg diff: 5.9°C

Where are air quality stations near Merrillville?

21
Hammond-167th St, Indiana, USA
18.3 km PM2.5: 5.0 µg/m³
27
Ogden Dunes, Indiana, USA
18.7 km PM2.5: 6.5 µg/m³
17
East Chicago - Marina, Indiana, USA
20.8 km PM2.5: 4.1 µg/m³
28
Hegewisch 3
25.3 km PM2.5: 6.6 µg/m³
30
Hegewisch 4
26.1 km PM2.5: 7.3 µg/m³
26
Hegewisch 2
26.5 km PM2.5: 6.2 µg/m³
32
Hegewisch 5
26.5 km PM2.5: 7.6 µg/m³
28
Hegewisch 6
27.1 km PM2.5: 6.8 µg/m³
27
Hegewisch 1
27.5 km PM2.5: 6.4 µg/m³
30
South Deering 6
27.8 km PM2.5: 7.3 µg/m³

What cities are near Merrillville?

21 Crown Point 19 Hobart 26 Griffith 27 Schererville 25 Gary 25 Highland 27 Dyer 17 Portage 25 Munster 23 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 2026-09-05T15:48 UTC.