Heilongtan, Meishan, Sichuan, China 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
Heilongtan, Meishan, Sichuan, China
AQI Trends: Highest and Lowest
Same Day Analysis (7th March):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 107 of Poor air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Mar - 7th Mar 2026
Heilongtan, Meishan, Sichuan, China
7 AM6th Mar 2026
6 PM
6 AM7th Mar 2026
104AQI
79AQI
128AQI
99AQI
In the last 24 hours,
Heilongtan's AQI reached its highest point of 128 at 3 AM during the Night, while the lowest point, 79, was recorded at 6 PM during the Day between 6th Mar and 7th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Heilongtan, Meishan, Sichuan, China
13°C9/17°C
10°C8/12°C
8°C6/10°C
8°C6/11°C
10°C7/14°C
11°C7/15°C
12°C8/16°C
14°C11/18°C
14°C10/18°C
14°C11/17°C
13°C9/16°C
12°C10/15°C
13°C11/17°C
14°C10/19°C
16°C12/21°C
17°C12/22°C
17°C15/21°C
17°C15/22°C
16°C13/21°C
17°C13/22°C
18°C15/23°C
17°C14/21°C
16°C13/18°C
13°C12/15°C
12°C11/14°C
13°C12/16°C
16°C12/22°C
16°C15/20°C
16°C14/18°C
13°C12/14°C
106AQI
80AQI
110AQI
82AQI
2026 Days Vs Air Quality
Heilongtan, Meishan, Sichuan, China
6%
4
29%
19
42%
28
23%
15
Total number of days with different AQI categories in last 67 days in 2026 (298 days remaining)
Under WHO’s Safe Air Quality Limits: 6%
Health Risk Level:
Extreme
In 2026, 6% of 67 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Heilongtan, Meishan, Sichuan, China
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
71AQI (US)
98AQI (US)
53AQI (US)
72AQI (US)
132AQI (US)
104AQI (US)
122AQI (US)
140AQI (US)
154AQI (US)
169AQI (US)
186AQI (US)
190AQI (US)
186AQI (US)
170AQI (US)
158AQI (US)
166AQI (US)
180AQI (US)
190AQI (US)
126AQI (US)
54AQI (US)
95AQI (US)
115AQI (US)
89AQI (US)
149AQI (US)
148AQI (US)
133AQI (US)
146AQI (US)
144AQI (US)
156AQI (US)
116AQI (US)
138AQI (US)
146AQI (US)
146AQI (US)
153AQI (US)
151AQI (US)
156AQI (US)
155AQI (US)
131AQI (US)
76AQI (US)
72AQI (US)
81AQI (US)
94AQI (US)
122AQI (US)
131AQI (US)
147AQI (US)
132AQI (US)
71AQI (US)
141AQI (US)
129AQI (US)
128AQI (US)
132AQI (US)
138AQI (US)
142AQI (US)
149AQI (US)
68AQI (US)
86AQI (US)
76AQI (US)
69AQI (US)
86AQI (US)
35AQI (US)
50AQI (US)
38AQI (US)
46AQI (US)
67AQI (US)
91AQI (US)
107AQI (US)
134AQI (US)
118AQI (US)
62AQI (US)
No. of days
2026120AQI (US)
Highest AQI (US) recorded in
January134AQI (US)
Lowest AQI (US) recorded in
March62AQI (US)
202589AQI (US)
Highest AQI (US) recorded in
January147AQI (US)
Lowest AQI (US) recorded in
July52AQI (US)
202481AQI (US)
Highest AQI (US) recorded in
January152AQI (US)
Lowest AQI (US) recorded in
March13AQI (US)
2023134AQI (US)
Highest AQI (US) recorded in
December135AQI (US)
Lowest AQI (US) recorded in
November119AQI (US)
2022106AQI (US)
Highest AQI (US) recorded in
January144AQI (US)
Lowest AQI (US) recorded in
May43AQI (US)
202183AQI (US)
Highest AQI (US) recorded in
January131AQI (US)
Lowest AQI (US) recorded in
September53AQI (US)
202078AQI (US)
Highest AQI (US) recorded in
December109AQI (US)
Lowest AQI (US) recorded in
July59AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Heilongtan's annual 2026 AQI (US) (120) shows an average percentage change of 30.1% (worsened AQI (US)) compared to previous years: 2020 (78), 2021 (83), 2022 (106), 2023 (134), 2024 (81), 2025 (89).