Piedras Negras, Coahuila De Zaragoza, Mexico 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
Piedras Negras, Coahuila De Zaragoza, Mexico
AQI Trends: Highest and Lowest
Same Day Analysis (13th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 47 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Sep - 14th Sep 2025
Piedras Negras, Coahuila De Zaragoza, Mexico
7 AM13th Sep 2025
8 PM
6 AM14th Sep 2025
54AQI
42AQI
59AQI
44AQI
In the last 24 hours,
Piedras Negras's AQI reached its highest point of 59 at 1 AM during the Night, while the lowest point, 42, was recorded at 5 PM during the Day between 13th Sep and 14th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Piedras Negras, Coahuila De Zaragoza, Mexico
32°C26/39°C
34°C27/42°C
33°C26/41°C
33°C26/42°C
32°C24/42°C
31°C25/40°C
26°C24/28°C
31°C24/39°C
30°C25/38°C
31°C23/40°C
31°C24/39°C
30°C25/36°C
32°C26/40°C
32°C25/40°C
33°C25/42°C
33°C26/42°C
33°C25/41°C
27°C24/29°C
30°C22/39°C
31°C22/40°C
32°C22/42°C
33°C25/42°C
30°C28/35°C
26°C24/28°C
27°C22/34°C
28°C21/36°C
28°C21/37°C
30°C25/37°C
29°C22/37°C
30°C25/36°C
--°C/°C
49AQI
43AQI
46AQI
40AQI
2025 Days Vs Air Quality
Piedras Negras, Coahuila De Zaragoza, Mexico
51%
131
49%
125
Total number of days with different AQI categories in last 257 days in 2025 (108 days remaining)
Under WHO’s Safe Air Quality Limits: 51%
Health Risk Level:
Considerable
In 2025, 51% of 257 days were within WHO’s safe air quality limits, and 49% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Piedras Negras, Coahuila De Zaragoza, Mexico
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
84AQI
54AQI
64AQI
67AQI
66AQI
47AQI
48AQI
46AQI
52AQI
47AQI
48AQI
51AQI
55AQI
57AQI
59AQI
58AQI
50AQI
49AQI
52AQI
49AQI
44AQI
49AQI
47AQI
48AQI
46AQI
49AQI
52AQI
53AQI
55AQI
55AQI
55AQI
63AQI
62AQI
61AQI
60AQI
55AQI
58AQI
57AQI
60AQI
58AQI
60AQI
57AQI
57AQI
53AQI
52AQI
55AQI
49AQI
52AQI
49AQI
50AQI
44AQI
50AQI
46AQI
50AQI
48AQI
52AQI
51AQI
52AQI
48AQI
52AQI
50AQI
55AQI
67AQI
60AQI
63AQI
60AQI
65AQI
54AQI
56AQI
54AQI
55AQI
62AQI
60AQI
65AQI
60AQI
61AQI
60AQI
71AQI
61AQI
61AQI
62AQI
60AQI
60AQI
60AQI
57AQI
41AQI
40AQI
44AQI
62AQI
64AQI
74AQI
71AQI
67AQI
57AQI
39AQI
30AQI
38AQI
41AQI
39AQI
42AQI
45AQI
41AQI
42AQI
42AQI
44AQI
47AQI
48AQI
55AQI
60AQI
51AQI
48AQI
52AQI
51AQI
58AQI
63AQI
63AQI
56AQI
58AQI
53AQI
55AQI
58AQI
51AQI
37AQI
39AQI
45AQI
57AQI
44AQI
46AQI
43AQI
36AQI
39AQI
39AQI
46AQI
53AQI
63AQI
69AQI
73AQI
69AQI
67AQI
61AQI
55AQI
62AQI
56AQI
58AQI
59AQI
65AQI
51AQI
48AQI
49AQI
50AQI
48AQI
48AQI
58AQI
62AQI
58AQI
53AQI
55AQI
56AQI
56AQI
54AQI
58AQI
52AQI
49AQI
55AQI
62AQI
59AQI
50AQI
43AQI
52AQI
51AQI
48AQI
33AQI
35AQI
41AQI
38AQI
33AQI
31AQI
27AQI
27AQI
31AQI
35AQI
32AQI
36AQI
43AQI
49AQI
63AQI
62AQI
55AQI
50AQI
38AQI
51AQI
51AQI
48AQI
41AQI
38AQI
40AQI
55AQI
63AQI
52AQI
47AQI
44AQI
51AQI
49AQI
43AQI
30AQI
33AQI
41AQI
37AQI
44AQI
54AQI
49AQI
44AQI
35AQI
30AQI
31AQI
32AQI
34AQI
36AQI
36AQI
33AQI
39AQI
33AQI
36AQI
35AQI
36AQI
61AQI
41AQI
39AQI
53AQI
30AQI
32AQI
43AQI
48AQI
50AQI
45AQI
44AQI
49AQI
47AQI
51AQI
43AQI
45AQI
46AQI
37AQI
31AQI
38AQI
39AQI
76AQI
35AQI
46AQI
41AQI
48AQI
48AQI
47AQI
44AQI
41AQI
47AQI
53AQI
54AQI
58AQI
51AQI
53AQI
47AQI
46AQI
40AQI
45AQI
No. of days
202550AQI
Highest AQI recorded in
March58AQI
Lowest AQI recorded in
August40AQI
202441AQI
Highest AQI recorded in
December66AQI
Lowest AQI recorded in
August13AQI
2023103AQI
Highest AQI recorded in
May404AQI
Lowest AQI recorded in
January20AQI
202258AQI
Highest AQI recorded in
November414AQI
Lowest AQI recorded in
September34AQI
2021100AQI
Highest AQI recorded in
April165AQI
Lowest AQI recorded in
August49AQI
2020254AQI
Highest AQI recorded in
December405AQI
Lowest AQI recorded in
June35AQI
Most & Least Polluted Years Over the Last 6 Years
Piedras Negras's annual 2025 AQI (50) shows an average percentage change of -34.5% (improved AQI) compared to previous years: 2020 (254), 2021 (100), 2022 (58), 2023 (103), 2024 (41).