Air Quality in Waterloo, United States
Partly Cloudy
15.4°C · 59.5% humidity
15.4°
Feels 15.4°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Waterloo's air quality — share it
AQI Forecast
25
2pm
25
25
53
5pm
45
38
35
8pm
32
30
29
11pm
28
27
26
2am
26
26
26
5am
25
25
24
8am
24
24
25
11am
25
25
Air Quality Index Trend
27h · 1 stnWaterloo'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 Waterloo is 2.6× the WHO annual guideline of 5 µg/m³.
59.5%
Humidity
39.3 km/h
Wind ENE
1028.3 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
13.1 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Waterloo?
Temperature & Precipitation
PM2.5 Trend
27h · 1 stationPM2.513.1 µg/m³
✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX6.9
High
Station readings (1 station within 25 km)
13.1
Median
13.1
Average
13.1
Low
13.1
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -6.0
What is the 7-day forecast for Waterloo?
05-28
25.8° 10.3°
61.0 mm
05-29
29.6° 5.4°
05-30
22.7° 13.2°
11.0 mm
05-31
29.2° 12.3°
1.81 mm
06-01
26.2° 16.2°
5.06 mm
06-02
22.4° 15.7°
0.44 mm
06-03
31.3° 22.5°
0.5 mm
Both models agree
Avg diff: 5.3°C
Where are air quality stations near Waterloo?
55
Water Tower, Waterloo, Iowa, USA
26
Water Tower, Waterloo, Iowa, USA
22
Water Tower, Waterloo, Iowa, USA
What cities are near Waterloo?
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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 2026-05-28T22:51 UTC.