Kennewick, Washington, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
March Air Quality Analysis
Kennewick, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 58 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Mar - 12th Mar 2026
Kennewick, Washington, United States
6 AM11th Mar 2026
5 PM
5 AM12th Mar 2026
72AQI
13AQI
142AQI
17AQI
In the last 24 hours,
Kennewick's AQI reached its highest point of 142 at 5 AM during the Night, while the lowest point, 13, was recorded at 10 AM during the Day between 11th Mar and 12th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Kennewick, Washington, United States
4°C-1/10°C
2°C-4/8°C
2°C-3/8°C
6°C3/9°C
6°C3/8°C
6°C2/11°C
5°C0/12°C
4°C0/9°C
1°C-3/8°C
1°C-2/5°C
3°C-2/11°C
6°C-1/13°C
6°C3/11°C
5°C5/7°C
7°C2/14°C
7°C1/17°C
10°C2/19°C
7°C0/14°C
6°C-1/15°C
8°C-1/19°C
11°C1/22°C
12°C8/18°C
11°C6/18°C
12°C5/20°C
16°C8/26°C
14°C9/21°C
8°C3/12°C
6°C3/10°C
11°C5/18°C
12°C10/15°C
46AQI
29AQI
36AQI
28AQI
2026 Days Vs Air Quality
Kennewick, Washington, United States
96%
68
4%
3
Total number of days with different AQI categories in last 72 days in 2026 (293 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 72 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Kennewick, Washington, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
56AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
20AQI (US)
12AQI (US)
13AQI (US)
13AQI (US)
11AQI (US)
31AQI (US)
40AQI (US)
32AQI (US)
24AQI (US)
30AQI (US)
41AQI (US)
26AQI (US)
27AQI (US)
35AQI (US)
23AQI (US)
30AQI (US)
27AQI (US)
32AQI (US)
31AQI (US)
32AQI (US)
32AQI (US)
36AQI (US)
25AQI (US)
28AQI (US)
35AQI (US)
43AQI (US)
25AQI (US)
37AQI (US)
40AQI (US)
37AQI (US)
34AQI (US)
40AQI (US)
28AQI (US)
28AQI (US)
41AQI (US)
44AQI (US)
35AQI (US)
31AQI (US)
22AQI (US)
21AQI (US)
30AQI (US)
29AQI (US)
44AQI (US)
40AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
28AQI (US)
34AQI (US)
30AQI (US)
44AQI (US)
37AQI (US)
29AQI (US)
33AQI (US)
29AQI (US)
32AQI (US)
46AQI (US)
25AQI (US)
40AQI (US)
36AQI (US)
29AQI (US)
36AQI (US)
62AQI (US)
34AQI (US)
32AQI (US)
38AQI (US)
58AQI (US)
29AQI (US)
34AQI (US)
39AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
March39AQI (US)
Lowest AQI (US) recorded in
January29AQI (US)
202529AQI (US)
Highest AQI (US) recorded in
September52AQI (US)
Lowest AQI (US) recorded in
May17AQI (US)
202425AQI (US)
Highest AQI (US) recorded in
July36AQI (US)
Lowest AQI (US) recorded in
March15AQI (US)
202327AQI (US)
Highest AQI (US) recorded in
August56AQI (US)
Lowest AQI (US) recorded in
April13AQI (US)
202225AQI (US)
Highest AQI (US) recorded in
September46AQI (US)
Lowest AQI (US) recorded in
May11AQI (US)
202127AQI (US)
Highest AQI (US) recorded in
August62AQI (US)
Lowest AQI (US) recorded in
December13AQI (US)
202039AQI (US)
Highest AQI (US) recorded in
September126AQI (US)
Lowest AQI (US) recorded in
May17AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Kennewick's annual 2026 AQI (US) (33) shows an average percentage change of 16.5% (worsened AQI (US)) compared to previous years: 2020 (39), 2021 (27), 2022 (25), 2023 (27), 2024 (25), 2025 (29).