Port Arthur, Texas, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Port Arthur, Texas, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 35 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
Port Arthur, Texas, United States
7 AM29th Sep 2025
7 PM
6 AM30th Sep 2025
39AQI
13AQI
50AQI
14AQI
In the last 24 hours,
Port Arthur's AQI reached its highest point of 50 at 2 AM during the Night, while the lowest point, 13, was recorded at 7 PM during the Day between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Port Arthur, Texas, United States
26°C24/32°C
27°C24/32°C
29°C24/34°C
29°C25/35°C
30°C25/37°C
29°C26/33°C
30°C27/33°C
26°C23/31°C
26°C21/33°C
26°C18/33°C
28°C19/36°C
30°C24/37°C
29°C24/37°C
29°C23/37°C
29°C23/37°C
28°C25/33°C
29°C23/37°C
30°C25/37°C
28°C23/35°C
28°C22/35°C
28°C24/32°C
27°C23/32°C
27°C25/32°C
27°C25/32°C
27°C24/32°C
27°C23/34°C
26°C20/33°C
26°C18/33°C
26°C18/34°C
27°C18/35°C
--°C/°C
46AQI
42AQI
42AQI
42AQI
2025 Days Vs Air Quality
Port Arthur, Texas, United States
71%
132
29%
55
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 71%
Health Risk Level:
Low
In 2025, 71% of 273 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
Port Arthur, Texas, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
41AQI
36AQI
52AQI
56AQI
60AQI
51AQI
55AQI
54AQI
54AQI
24AQI
24AQI
41AQI
38AQI
29AQI
37AQI
46AQI
36AQI
35AQI
39AQI
45AQI
37AQI
41AQI
55AQI
55AQI
50AQI
47AQI
49AQI
54AQI
54AQI
44AQI
35AQI
32AQI
29AQI
44AQI
49AQI
40AQI
27AQI
27AQI
30AQI
41AQI
33AQI
33AQI
28AQI
31AQI
30AQI
26AQI
35AQI
41AQI
48AQI
50AQI
51AQI
44AQI
49AQI
53AQI
43AQI
42AQI
36AQI
42AQI
54AQI
47AQI
30AQI
29AQI
28AQI
33AQI
41AQI
49AQI
48AQI
38AQI
36AQI
44AQI
52AQI
60AQI
48AQI
50AQI
51AQI
37AQI
27AQI
33AQI
47AQI
49AQI
34AQI
45AQI
55AQI
52AQI
53AQI
56AQI
57AQI
37AQI
29AQI
27AQI
24AQI
24AQI
32AQI
35AQI
54AQI
59AQI
64AQI
57AQI
51AQI
61AQI
61AQI
58AQI
49AQI
47AQI
55AQI
55AQI
52AQI
38AQI
34AQI
46AQI
54AQI
54AQI
51AQI
42AQI
43AQI
39AQI
35AQI
33AQI
34AQI
39AQI
40AQI
43AQI
52AQI
57AQI
62AQI
50AQI
51AQI
42AQI
48AQI
53AQI
55AQI
40AQI
32AQI
31AQI
33AQI
28AQI
36AQI
40AQI
35AQI
36AQI
39AQI
38AQI
47AQI
44AQI
48AQI
57AQI
56AQI
50AQI
41AQI
49AQI
54AQI
55AQI
46AQI
44AQI
51AQI
42AQI
36AQI
50AQI
45AQI
47AQI
41AQI
43AQI
38AQI
49AQI
47AQI
52AQI
57AQI
44AQI
59AQI
59AQI
60AQI
55AQI
53AQI
57AQI
50AQI
42AQI
28AQI
23AQI
25AQI
21AQI
21AQI
28AQI
37AQI
40AQI
38AQI
35AQI
44AQI
43AQI
38AQI
43AQI
49AQI
44AQI
43AQI
No. of days
202543AQI
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
May38AQI
Most & Least Polluted Years Over the Last 1 Years
Port Arthur's annual 2025 AQI (43) shows an average percentage change of NaN% (improved AQI) compared to previous years: .