Vietnam
3ppb
Last Updated: 2025-07-12 11:26:28 PM (Local Time)
MapHanoi
What is the Current SO2 Level?
Hanoi
The current SO2 level in Hanoi based on the average air quality level across the city is 3 ppb, making it healthy and safe for everyone.
The current SO2 level in Hanoi is 5.09x Below the recommended WHO guideline of 15.27 ppb.
Trending in Vietnam
Why You Should Be Monitoring Air Quality During Monsoon — Not Just in Winter?
Air Pollution and Lung Cancer: How Toxic Air is Mutating Your DNA?
City Climate Change Severity Analysis is NOW LIVE on AQI.in!📢
AQI Graph
Historical Air Quality Data
Hanoi
Download 2024 Annual Data
World Air Quality Report
Sulfur Dioxide (SO₂): Sulfur dioxide is the major component in acid rain as it easily dissolves in the water and forms sulfuric acid. And SO2 in acid rain can harm forests, crops, and aquatic ecosystems, change soil acidity, and deteriorate building materials and historical monuments.
Chemical manufacturing
The production processes that emit sulfur dioxide.
Industries
Emissions from manufacturing and industrial processes.
Power plants generation
Released during the burning of fossil fuels for electricity.
Petroleum Refineries
Emits from refining crude oil into various products.
Heavy-duty vehicles
Exhaust from trucks and buses using diesel fuel.
Nose irritation
Discomfort in the nasal passages.
Throat and lung irritation
Inflammation and pain in the throat.
Coughing and phlegmz
Persistent cough and mucus production.
Asthma attacks
Triggering of asthma symptoms or existing asthma.
Wheezing
High-pitched whistling sound when breathing.Health Advice Based on Current SO2 Level In
Hanoi
As per the current SO2, turn off the air purifier.
Get an Air Purifier
Air Quality FAQs
at Hanoi
Frequently Asked Questions About Air Quality
What is the current SO2 level in Hanoi?
The current real-time SO2 level in Hanoi is 3 ppb (Good). This was last updated 2025-07-12 11:26:28 PM (Local Time).
When was the best SO2 level in Hanoi in the last 24 hours?
The best SO2 level was 6 ppb (Good) at 7:11 AM (Local Time) during the last 24 hours.
When was the worst SO2 level in Hanoi in the last 24 hours?
The worst SO2 level was 10 ppb (Good) at 11:11 AM (Local Time) during the last 24 hours.
What is the current trend of SO2 levels in Hanoi during last 24 hours?
The SO2 levels in Hanoi have been fluctuating throughout the last 24 hours. The levels have increased by highest 10 ppb at 11:11 AM (Local Time), lowest 6 ppb at 7:11 AM (Local Time).
What actions are recommended as per the current SO2 level in Hanoi?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.
