Dust Detective Project

Know the origin, understand the problem, and fix it at the right point.

Where does dust come from? How does Bangkok manage dust? Your participation

Dust Detective Project studies and analyzes the sources of PM2.5 dust.
In Bangkok, it was found to come from 6 main sources and differ according to the time period.
Knowing the patterns of PM2.5 dust helps Bangkok design
Solving problems at the right point

PM2.5 dust in
Where does Bangkok come from?

Diesel car : 46%
What is ?
Biomass combustion: 22%
What is ?
Secondary dust : 14%
What is ?
Gasoline car : 11%
What is ?
Others : 7%
What is ?

Did you know?
Dust at high altitudes and dust at ground level
They have different origins.

In high places, dust comes from
The sun!?

(High = 10th floor and above)

yes sunlightIt will react chemically with gases in the air (secondary dust) to produce dust. Which is something that happens naturally. But there is still some dust from factories and construction floating in and mixing in.

Ground level dust
It comes from vehicle fumes and burning.

(Ground level = Floor 1 to Floor 10)

Dust fromDiesel vehicle fumes and burning There will be large molecules, causingFloating low When you walk on the street or if you are on the 1st to 10th floor, you are exposed to dust from these two sources.

Season change
The source of dust has also changed.

Jan.

Feb.

Mar.

Apr.

May

June

July

August

September

Oct.

Nov.

Dec.

Smog period Jan.-Apr.

Dust from biomass combustion
From the nearby area is a source
Origin of PM2.5 dust

Very good

Good

Moderate

Starting to have an impact
To health

Have an impact
To health

now

There are 6 types of PM2.5 dust.

Midnight Particle Patterns

Occurs when the air cools after midnight
High humidity causes fine dust to condense into larger dust particles
Most commonly found after midnight until early morning

Inversion Particle Patterns

Born between December and February
Caused by the Temperature Inversion phenomenon where air does not move
The cold and windless air causes dust to accumulate in the area

Transboundary Particle Patterns:

Dust from burning agricultural materials outside Bangkok
Wind blows dust into Bangkok and accumulates in the air.
Often found at an altitude of 110 meters.

Secondary Particle Patterns

Dust that results from chemical reactions in the air when sunlight is strong
Including gases such as SO2, NOX, NH3
Occurs in closed weather conditions with light or calm winds

Mixed Particle Patterns

It is a combination of different types of dust, such as midnight dust and temperature inversion dust
Causing PM2.5 concentrations to remain high throughout the day

Dust has no pattern (Unpattern)

Dust that does not fall into any category
PM2.5 concentrations often exceed standards for only 1-2 hours

Know the origin, understand the problem
Fix it right on point

Low Emission Zone
This car reduces dust.

Free vehicle inspection for the public. Special prices for oil changes, parts, and labor.

Inspection Project
Proactive air quality

Inspect factories and cars to identify PM2.5 sources and solve the root cause.

Network Project
Work From Home

Support government and private sectors to work from home on dusty days

BMA Feeder

Modern air-conditioned vehicles help reduce emissions from private cars, leading to improved air quality and a healthier environment

BKK Project
Clean Air Area

Plant trees, set up air purifiers, and teach kids about it

Low Emission Zone
Project

Control dust from different sources in the controlled zone, starting in Pathumwan

You can also participate.

Check engine condition
Consistently

"Car project reduces dust"
Offer a maximum discount of 55%

Dust reduce vehicle

Use public transportation instead of driving, or turn off the garbage disposal

Registered Entrepreneur
Work From Home when there is high dust

Register

If you find the cause of dust, please report it via Traffy Fondue

Traffy Fondue

Do not burn waste

With everyone's cooperation
We can reduce the PM2.5 dust problem.
In Bangkok, you can

Frequently asked questions

What is the Dust Detective Project?

The Dust Detective Project is a project that focuses on studying and analyzing the sources of PM2.5 dust in Bangkok in order to prevent and solve the problem at the source.

Where does PM2.5 dust in Bangkok come from?

From the study of the Dust Detective Project, it was found that PM2.5 dust in Bangkok comes from 5 main sources:

Diesel car : 46%
Biomass combustion: 22%
Secondary dust : 14%
Gasoline car : 11%
Others : 7%

What are the sources of PM2.5 dust at different heights?

At 30 m height: Dust from diesel vehicles (46%) and biomass combustion (22%).
At 75 m altitude: other dust (49%) and secondary dust (32%).
At 110 m: Other dust (58%) and secondary dust (22%).

What are the forms of PM2.5 dust?

PM2.5 dust is divided into 6 main forms:

Midnight dust: Occurs when temperatures are low and humidity is high, most common after midnight.
Temperature inversion dust: Occurs when the temperature in the atmosphere near the Earth's surface is colder than in the upper atmosphere.
Dust from long-distance movement: Coming from a distant source, floating on the wind
Secondary dust: It is caused by the reaction of sunlight with polluting gases in the atmosphere.
Mixed dust: It is caused by the combination of various types of dust
Dust has no form: Unable to classify

How can we play our part in reducing the PM2.5 dust problem?

We can help reduce the PM2.5 dust problem by:

Avoid using black smoke vehicles.
Promote the use of public transport
Control open burning
Air quality monitoring and alerts

Why do we need to know the patterns of PM2.5 dust?

Knowing the patterns of PM2.5 dust will help design solutions that are targeted, as each pattern has different sources, behaviors, and timing of occurrence.

What are some solutions to the PM2.5 dust problem in Bangkok?

There are several ways to solve the PM2.5 dust problem, such as:

Low Emission ZoneThis car reduces dust. People bring their cars for free check-ups, oil changes, and special prices on parts and labor
Low Emission ZoneProactive air quality monitoring Inspect factories and vehicles to find the source of PM2.5 dust and solve the problem from the beginning.
Network Project Work From Home Supporting government and private sectors to work from home on dusty days
BMA Feeder Modern air-conditioned vehicles help reduce emissions from private cars, leading to improved air quality and a healthier environment
Low Emission Zone BKK Clean Air Area Plant trees, install air purifiers and raise awareness among youth.
Low Emission Zone Project Control dust emissions from various sources in the controlled zones, starting at Pathumwan District
Alert service when high dust values pass Line Alert It will help you to receive notifications when PM 2.5 dust values exceed the standard