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!
February Air Quality Analysis
Hengyang Chemical Plant, Hengyang, Hunan, China
AQI Trends: Highest and Lowest
Same Day Analysis (17th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 125 of Poor air quality, showing improvement over 2025 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Feb - 17th Feb 2026
Hengyang Chemical Plant, Hengyang, Hunan, China
7 AM16th Feb 2026
6 PM
6 AM17th Feb 2026
22AQI
8AQI
148AQI
23AQI
In the last 24 hours,
Hengyang Chemical Plant's AQI reached its highest point of 148 at 5 AM during the Night, while the lowest point, 8, was recorded at 9 AM during the Day between 16th Feb and 17th Feb 2026.
Day & Night AQI Trend : Jan - Feb 2026
Hengyang Chemical Plant, Hengyang, Hunan, China
10°C3/14°C
2°C0/3°C
0°C-1/1°C
1°C0/3°C
5°C0/11°C
10°C5/16°C
11°C8/16°C
8°C7/8°C
7°C6/9°C
9°C4/15°C
11°C7/18°C
7°C4/9°C
5°C3/8°C
7°C3/12°C
10°C7/14°C
13°C9/18°C
15°C10/23°C
17°C13/21°C
11°C8/12°C
8°C7/8°C
9°C5/13°C
8°C6/11°C
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
102AQI
95AQI
109AQI
100AQI
2026 Days Vs Air Quality
Hengyang Chemical Plant, Hengyang, Hunan, China
4%
2
23%
11
54%
26
19%
9
Total number of days with different AQI categories in last 50 days in 2026 (315 days remaining)
Under WHO’s Safe Air Quality Limits: 4%
Health Risk Level:
Extreme
In 2026, 4% of 50 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)
122AQI (US)
110AQI (US)
No. of days
2026118AQI (US)
Highest AQI (US) recorded in
January122AQI (US)
Lowest AQI (US) recorded in
February110AQI (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) (118) shows an average percentage change of 35.1% (worsened AQI (US)) compared to previous years: 2020 (66), 2021 (89), 2022 (94), 2023 (100), 2024 (88), 2025 (96).