Waterloo, Iowa, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
February Air Quality Analysis
Waterloo, Iowa, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 46 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Feb - 10th Feb 2026
Waterloo, Iowa, United States
7 AM9th Feb 2026
5 PM
6 AM10th Feb 2026
76AQI
26AQI
60AQI
28AQI
In the last 24 hours,
Waterloo's AQI reached its highest point of 76 at 1 PM during the Day, while the lowest point, 26, was recorded at 5 PM during the Day between 9th Feb and 10th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Waterloo, Iowa, United States
1°C-5/12°C
6°C1/12°C
-3°C-8/-1°C
-6°C-11/-2°C
-2°C-8/2°C
-12°C-14/-12°C
-11°C-14/-7°C
-16°C-20/-12°C
-13°C-20/-4°C
-7°C-13/2°C
-11°C-19/-6°C
-23°C-27/-19°C
-21°C-24/-17°C
-17°C-21/-10°C
-16°C-23/-8°C
-12°C-16/-9°C
-14°C-19/-6°C
-14°C-19/-8°C
-15°C-20/-8°C
-12°C-18/-4°C
-9°C-15/-4°C
-7°C-9/-4°C
-7°C-11/-4°C
-10°C-17/-2°C
0°C-5/4°C
2°C-1/5°C
-4°C-9/3°C
-1°C-5/4°C
1°C-6/12°C
2°C-1/4°C
54AQI
38AQI
49AQI
37AQI
2026 Days Vs Air Quality
Waterloo, Iowa, United States
85%
35
15%
6
Total number of days with different AQI categories in last 42 days in 2026 (323 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 42 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Waterloo, Iowa, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
36AQI (US)
42AQI (US)
43AQI (US)
45AQI (US)
47AQI (US)
61AQI (US)
42AQI (US)
38AQI (US)
38AQI (US)
42AQI (US)
34AQI (US)
31AQI (US)
27AQI (US)
24AQI (US)
29AQI (US)
22AQI (US)
34AQI (US)
28AQI (US)
30AQI (US)
43AQI (US)
44AQI (US)
59AQI (US)
59AQI (US)
48AQI (US)
49AQI (US)
47AQI (US)
36AQI (US)
42AQI (US)
50AQI (US)
59AQI (US)
42AQI (US)
46AQI (US)
51AQI (US)
48AQI (US)
44AQI (US)
51AQI (US)
46AQI (US)
39AQI (US)
42AQI (US)
47AQI (US)
46AQI (US)
41AQI (US)
46AQI (US)
No. of days
202642AQI (US)
Highest AQI (US) recorded in
February46AQI (US)
Lowest AQI (US) recorded in
January41AQI (US)
202539AQI (US)
Highest AQI (US) recorded in
December53AQI (US)
Lowest AQI (US) recorded in
January31AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
October40AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
June69AQI (US)
Lowest AQI (US) recorded in
February32AQI (US)
202231AQI (US)
Highest AQI (US) recorded in
October42AQI (US)
Lowest AQI (US) recorded in
April19AQI (US)
202134AQI (US)
Highest AQI (US) recorded in
February48AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202029AQI (US)
Highest AQI (US) recorded in
April38AQI (US)
Lowest AQI (US) recorded in
May22AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Waterloo's annual 2026 AQI (US) (42) shows an average percentage change of 24.8% (worsened AQI (US)) compared to previous years: 2020 (29), 2021 (34), 2022 (31), 2023 (41), 2024 (32), 2025 (39).