AQI PM2.5 PM10 CO SO2 NO2 O3

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Koencho Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in Hokkaido

Last Updated: 2025-05-19 10:39:04 AM (Local Time)

Live AQI

Air Quality is

Good

pm10 : 18 µg/m³

PM2.5 : 6 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

17 °C

Last Updated: 2025-05-19 10:39:04 AM (Local Time)

Map

Koencho

Major Air Pollutants
Koencho

Particulate Matter(PM2.5)

6µg/m³

Particulate Matter(PM10)

18µg/m³

Carbon Monoxide(CO)

119ppb

Sulfur Dioxide(SO2)

2ppb

Nitrogen Dioxide(NO2)

5ppb

Ozone(O3)

38ppb

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AQI Graph

Historical Air Quality Data
Koencho

24 Hours

AQI

Koencho

Want air quality data?

AQI Trends - Annual Air Quality Changes
Koencho, Hokkaido, Japan

AQI

Year

AQI

Annual AQI Trends

2020

25AQI

2021

29AQI

16%

Rise

2022

27AQI

-7%

Fall

2023

31AQI

15%

Rise

2024

29AQI

-6%

Fall

2025

36AQI

24%

Rise

Overall Annual Percentage (%) change of AQI in (2020 to 2025)

Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedJanuary, 202143AQI

Least PollutedAugust, 202213AQI

* This data analysis is from year 2020 - 2025

Koencho's Locations
Real-time Air Pollution Level

Location

Status

AQI

PM2.5(µg/m³)

PM10(µg/m³)

Temp.(°C)

Humi.(%)

Tokiwacho

Good

Japan's Metro Cities
Air Quality Index

Aomori

Higashi Hiroshima

Higashi Osaka

Kyoto

Saitama

Sendai

Tokyo

Yokohama

Air Quality Calendar 2025
Koencho

2025

AQI

January

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Dec -	30 Dec -	31 Dec -	1 Jan 48	2 Jan 47	3 Jan 40	4 Jan 40
5 Jan 46	6 Jan 47	7 Jan 42	8 Jan 38	9 Jan 32	10 Jan 30	11 Jan 31
12 Jan 31	13 Jan 43	14 Jan 50	15 Jan 50	16 Jan 47	17 Jan 40	18 Jan 41
19 Jan 37	20 Jan 49	21 Jan 44	22 Jan 57	23 Jan 57	24 Jan 52	25 Jan 40
26 Jan 35	27 Jan 33	28 Jan 30	29 Jan 37	30 Jan 29	31 Jan 34	1 Feb 29

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan 35	27 Jan 33	28 Jan 30	29 Jan 37	30 Jan 29	31 Jan 34	1 Feb 29
2 Feb 38	3 Feb 41	4 Feb 31	5 Feb 40	6 Feb 35	7 Feb 37	8 Feb 32
9 Feb 29	10 Feb 31	11 Feb 29	12 Feb 43	13 Feb 50	14 Feb 43	15 Feb 56
16 Feb 47	17 Feb 39	18 Feb 37	19 Feb 32	20 Feb 31	21 Feb 32	22 Feb 28
23 Feb 29	24 Feb 31	25 Feb 36	26 Feb 44	27 Feb 40	28 Feb 62	1 Mar 48

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb 29	24 Feb 31	25 Feb 36	26 Feb 44	27 Feb 40	28 Feb 62	1 Mar 48
2 Mar 43	3 Mar 36	4 Mar 34	5 Mar 37	6 Mar 31	7 Mar 34	8 Mar 29
9 Mar 33	10 Mar 35	11 Mar 44	12 Mar 55	13 Mar 41	14 Mar 31	15 Mar 29
16 Mar 27	17 Mar 21	18 Mar 25	19 Mar 29	20 Mar 39	21 Mar 44	22 Mar 39
23 Mar 31	24 Mar 33	25 Mar 42	26 Mar 33	27 Mar 33	28 Mar 28	29 Mar 27
30 Mar 29	31 Mar 28	1 Apr 38	2 Apr 32	3 Apr 28	4 Apr 29	5 Apr 34

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 29	31 Mar 28	1 Apr 38	2 Apr 32	3 Apr 28	4 Apr 29	5 Apr 34
6 Apr 38	7 Apr 31	8 Apr 32	9 Apr 33	10 Apr 46	11 Apr 47	12 Apr 42
13 Apr 47	14 Apr 32	15 Apr 28	16 Apr 20	17 Apr 26	18 Apr 23	19 Apr 25
20 Apr 23	21 Apr 31	22 Apr 26	23 Apr 30	24 Apr 28	25 Apr 24	26 Apr 35
27 Apr 25	28 Apr 23	29 Apr 20	30 Apr 21	1 May 27	2 May 27	3 May 26

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 25	28 Apr 23	29 Apr 20	30 Apr 21	1 May 27	2 May 27	3 May 26
4 May 35	5 May 30	6 May 35	7 May 33	8 May 36	9 May 38	10 May 30
11 May 30	12 May 37	13 May 39	14 May 44	15 May 43	16 May 48	17 May 43
18 May -	19 May -	20 May -	21 May -	22 May -	23 May -	24 May -
25 May -	26 May -	27 May -	28 May -	29 May -	30 May -	31 May -

Health Advice For People Living In
Koencho

0Cigarettes per day

Weekly 0 Cigarettes

Monthly 0 Cigarettes

Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.

Source:

Berkeley Earth

Solutions for Current AQI

Air PurifierTurn Off
Car FilterAdvisable
N95 MaskAdvisable
Stay IndoorAdvisable

As per the current AQI, turn off the air purifier.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

Koencho

Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)

Low Chances of Asthma

Asthma

Risk of Asthma symptoms is Low when AQI is Good (0-50)

Mild symptoms such as slight wheezing, occasional cough, and minor shortness of breath

Do's :

Keep track of air quality to plan outdoor activities safely.
Drink water to keep airways moist and reduce irritation.
Include non-allergenic fruits and vegetables that support overall lung health, like apples, pears, and spinach.

Don'ts :

Skip medications that is prescribed by your doctor.
Engage in outdoor activities in early morning during high pollen hours.

Most Polluted Cities 2025
Japan

Analyze the real-time most air polluted cities in the country.

Most Polluted Cities Live Ranking 2025

World's Most PollutedCity Rankings (2024)

World's Most PollutedCountry Rankings(2024)

RankCityAQIAQI Status

Standard Value

Honmachi, Japan

Moderate

4xabove Standard

Komatsushimacho, Japan

Sasaguri, Japan

Kamiyoshida, Japan

Fukuoka, Japan

Tama, Japan

Iizuka, Japan

Ide, Japan

Nakai, Japan

10.

Aki, Japan

Moderate

4xabove Standard

Last Updated: 19 May 2025, 02:18 AM

AQI City Rankings

Air Quality Solutions For Koencho
Explore the solutions of air quality monitoring & clean air.

Here are some applications that you can go through to find out the solutions.

Air Quality Monitor

Monitor the air quality

Air Quality Sensors

Sensors to measure the air quality

Fresh Air Machine

Clean the air you breathe

Car Cabin Filter

Purify the air in your car

N95 Mask

Shield yourself from pollution

air quality solutions for offices for Koencho

Air Quality Solution For Offices

A complete solution for air quality monitoring, data analysis, and fresh air solutions in workplaces prioritizing employee's health and productivity.

Air Quality Solutions For Smart City

Prana Air smart city project provides air quality monitors, drones, outdoor air purifiers, and data dashboards solution to improve air quality.

air quality solutions for institutes for Koencho

Air Quality Solutions for Schools | Institutes

Prana Air provides the air quality solutions for schools by air monitoring & fresh air machine that help the students to breather clean air.

Air Quality Solutions For Hotels

Prana Air air quality solutions are suited for hotel businesses. The occupancy of hotels is the main reasons for bad air quality.

Air Quality Solutions for Restaurants

Prana Air has the air quality solutions for restaurant, cafes, and gives you the power to know what your customers and staff breathe.

Air Quality Solutions for RMC Plants

Prana Air provides air quality monitoring solutions for RMC plants. Improve compliance, protect workers and community, and reduce emissions.

Air Quality Solutions for Fitness Center

Prana Air provides the air quality solutions of pollution monitoring and fresh air for fitness center - gym.

Air Quality Solutions for Parking Lot

A complete solution for air monitoring, data analysis, and fresh air solutions for enclosed car parking areas and car lots.

Air Quality Solutions for Retail Stores

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets.

air quality solutions for airport for Koencho

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets

Prana Air provides the air quality solutions for airport. Gathering of many passengers is the main reasons of bad air quality in airport.

Air Quality Solutions For Construction Sites

Prana Air offers air quality monitoring solutions for construction sites with data cloud storage, web-dashboard, mobile apps, TV display.

Air Quality Solutions For Hospitals

Prana Air provides air quality monitoring and fresh air solutions for hospitals to ensure clean and healthy indoor air.

air quality solutions for bathroom for Koencho

Air Quality Solutions For Washroom | Bathroom

Improve washroom and bathroom air quality with Prana Air air quality monitoring devices and fresh air machine. Breathe easy and stay healthy.

Air Quality Solutions for Banks

Prana Air provides air quality solutions of pollution monitoring and fresh air for banks and financial institutions.

Air Quality Solutions for Cinema

Air quality solutions for cinema halls or theatres will help the customers to get the good experience, comfort and breathe clean air.

Air Quality Solutions For Real Estates

Prana Air provides the air quality solutions of pollution monitoring and fresh air for real estates - residential and commercial.

Koencho's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Mobile App

Empower Your Decisions with Reliable Data

Get it onApp Store

Get it onGoogle Play

Your area’s real-time data with detailed parameters.

Personalized health advice as per current AQI.

Analytical data to identify trends and conditions.

Connect and control your air quality devices.

Air Quality FAQs
at Koencho

Frequently Asked Questions About Air Quality

What is the current AQI level in Koencho?

The current real-time AQI level in Koencho is 35 (Good) due to recent rainfall by 0.06mm/hr. This was last updated 2025-05-19 10:39:04 AM (Local Time).

When was the best AQI level in Koencho in the last 24 hours?

The best AQI level was 19 (Good) at 5:09 PM, May 18, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in Koencho in the last 24 hours?

The worst AQI level was 50 (Good) at 4:09 AM (Local Time) during the last 24 hours.

What is the current trend of AQI levels in Koencho during last 24 hours?

The AQI levels in Koencho have been fluctuating throughout the last 24 hours. The levels have increased by highest 50 at 4:09 AM (Local Time), lowest 19 at 5:09 PM, May 18, 2025 (Local Time).

What actions are recommended as per the current AQI level in Koencho?

The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.