Hengyang Chemical Plant, Hengyang, Hunan, 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
Hengyang Chemical Plant, Hengyang, Hunan, China
AQI Trends: Highest and Lowest
Same Day Analysis (11th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 92 of Moderate air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Mar - 11th Mar 2026
Hengyang Chemical Plant, Hengyang, Hunan, China
6 AM10th Mar 2026
6 PM
5 AM11th Mar 2026
153AQI
92AQI
120AQI
92AQI
In the last 24 hours,
Hengyang Chemical Plant's AQI reached its highest point of 153 at 7 AM during the Day, while the lowest point, 92, was recorded at 5 AM during the Night between 10th Mar and 11th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Hengyang Chemical Plant, Hengyang, Hunan, China
8°C7/9°C
9°C8/12°C
11°C8/15°C
14°C11/18°C
18°C13/24°C
21°C11/30°C
6°C4/7°C
6°C4/9°C
8°C4/14°C
10°C8/10°C
12°C6/20°C
18°C11/25°C
19°C16/22°C
22°C18/28°C
12°C10/12°C
13°C10/17°C
14°C12/15°C
12°C11/13°C
12°C11/15°C
12°C9/14°C
9°C8/11°C
9°C8/10°C
11°C8/15°C
13°C9/19°C
14°C9/18°C
14°C11/18°C
11°C10/11°C
10°C9/10°C
13°C9/17°C
15°C10/21°C
98AQI
81AQI
101AQI
83AQI
2026 Days Vs Air Quality
Hengyang Chemical Plant, Hengyang, Hunan, China
10%
7
27%
19
50%
35
13%
9
Total number of days with different AQI categories in last 71 days in 2026 (294 days remaining)
Under WHO’s Safe Air Quality Limits: 10%
Health Risk Level:
Extreme
In 2026, 10% of 71 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
Hengyang Chemical Plant, Hengyang, Hunan, China
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
72AQI (US)
110AQI (US)
127AQI (US)
140AQI (US)
110AQI (US)
151AQI (US)
136AQI (US)
122AQI (US)
125AQI (US)
153AQI (US)
165AQI (US)
155AQI (US)
173AQI (US)
149AQI (US)
160AQI (US)
169AQI (US)
166AQI (US)
168AQI (US)
88AQI (US)
37AQI (US)
92AQI (US)
117AQI (US)
127AQI (US)
94AQI (US)
111AQI (US)
84AQI (US)
107AQI (US)
124AQI (US)
110AQI (US)
71AQI (US)
78AQI (US)
91AQI (US)
84AQI (US)
77AQI (US)
99AQI (US)
145AQI (US)
126AQI (US)
118AQI (US)
103AQI (US)
104AQI (US)
112AQI (US)
123AQI (US)
142AQI (US)
139AQI (US)
127AQI (US)
116AQI (US)
34AQI (US)
125AQI (US)
132AQI (US)
107AQI (US)
93AQI (US)
115AQI (US)
127AQI (US)
100AQI (US)
57AQI (US)
93AQI (US)
57AQI (US)
33AQI (US)
42AQI (US)
13AQI (US)
46AQI (US)
74AQI (US)
132AQI (US)
102AQI (US)
110AQI (US)
137AQI (US)
72AQI (US)
48AQI (US)
130AQI (US)
92AQI (US)
122AQI (US)
101AQI (US)
87AQI (US)
No. of days
2026108AQI (US)
Highest AQI (US) recorded in
January122AQI (US)
Lowest AQI (US) recorded in
March87AQI (US)
202596AQI (US)
Highest AQI (US) recorded in
January152AQI (US)
Lowest AQI (US) recorded in
August55AQI (US)
202488AQI (US)
Highest AQI (US) recorded in
December147AQI (US)
Lowest AQI (US) recorded in
July23AQI (US)
2023100AQI (US)
Highest AQI (US) recorded in
January150AQI (US)
Lowest AQI (US) recorded in
July59AQI (US)
202294AQI (US)
Highest AQI (US) recorded in
December139AQI (US)
Lowest AQI (US) recorded in
July56AQI (US)
202189AQI (US)
Highest AQI (US) recorded in
January153AQI (US)
Lowest AQI (US) recorded in
May41AQI (US)
202066AQI (US)
Highest AQI (US) recorded in
December149AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Hengyang Chemical Plant's annual 2026 AQI (US) (108) shows an average percentage change of 24.02% (worsened AQI (US)) compared to previous years: 2020 (66), 2021 (89), 2022 (94), 2023 (100), 2024 (88), 2025 (96).