AQI PM2.5 PM10 CO SO2 NO2 O3

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Saku Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-05-23 04:39:46 PM (Local Time)

Live AQI

Air Quality is

Moderate

pm10 : 16 µg/m³

PM2.5 : 10 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

21 °C

Last Updated: 2025-05-23 04:39:46 PM (Local Time)

Map

Saku

Major Air Pollutants
Saku

Particulate Matter(PM2.5)

10µg/m³

Particulate Matter(PM10)

16µg/m³

Carbon Monoxide(CO)

147ppb

Sulfur Dioxide(SO2)

1ppb

Nitrogen Dioxide(NO2)

3ppb

Ozone(O3)

45ppb

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AQI Graph

Historical Air Quality Data
Saku

24 Hours

AQI

Saku

Want air quality data?

AQI Trends - Annual Air Quality Changes
Saku, Nagano, Japan

AQI

Year

AQI

Annual AQI Trends

2020

28AQI

2021

30AQI

Rise

2022

34AQI

13%

Rise

2023

31AQI

-9%

Fall

2024

32AQI

Rise

2025

37AQI

16%

Rise

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

Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedAugust, 202046AQI

Least PollutedAugust, 202216AQI

* This data analysis is from year 2020 - 2025

Saku's Locations
Real-time Air Pollution Level

Location

Status

AQI

PM2.5(µg/m³)

PM10(µg/m³)

Temp.(°C)

Humi.(%)

Atobe

Moderate

Iwamurada

Moderate

Japan's Metro Cities
Air Quality Index

Aomori

Higashi Hiroshima

Higashi Osaka

Kyoto

Saitama

Sendai

Tokyo

Yokohama

Air Quality Calendar 2025
Saku

2025

AQI

January

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
29 Dec -	30 Dec -	31 Dec -	1 Jan 29	2 Jan 31	3 Jan 27	4 Jan 27
5 Jan 27	6 Jan 35	7 Jan 28	8 Jan 31	9 Jan 27	10 Jan 25	11 Jan 25
12 Jan 30	13 Jan 28	14 Jan 30	15 Jan 31	16 Jan 28	17 Jan 30	18 Jan 27
19 Jan 32	20 Jan 30	21 Jan 39	22 Jan 37	23 Jan 46	24 Jan 50	25 Jan 40
26 Jan 37	27 Jan 32	28 Jan 39	29 Jan 37	30 Jan 38	31 Jan 33	1 Feb 42

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan 37	27 Jan 32	28 Jan 39	29 Jan 37	30 Jan 38	31 Jan 33	1 Feb 42
2 Feb 48	3 Feb 44	4 Feb 39	5 Feb 36	6 Feb 32	7 Feb 34	8 Feb 31
9 Feb 30	10 Feb 31	11 Feb 32	12 Feb 32	13 Feb 32	14 Feb 38	15 Feb 31
16 Feb 41	17 Feb 40	18 Feb 37	19 Feb 32	20 Feb 29	21 Feb 30	22 Feb 31
23 Feb 30	24 Feb 31	25 Feb 34	26 Feb 36	27 Feb 43	28 Feb 45	1 Mar 49

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb 30	24 Feb 31	25 Feb 34	26 Feb 36	27 Feb 43	28 Feb 45	1 Mar 49
2 Mar 48	3 Mar 37	4 Mar 39	5 Mar 33	6 Mar 33	7 Mar 35	8 Mar 39
9 Mar 38	10 Mar 39	11 Mar 45	12 Mar 37	13 Mar 46	14 Mar 40	15 Mar 40
16 Mar 24	17 Mar 23	18 Mar 24	19 Mar 21	20 Mar 27	21 Mar 40	22 Mar 47
23 Mar 58	24 Mar 59	25 Mar 76	26 Mar 82	27 Mar 71	28 Mar 46	29 Mar 37
30 Mar 37	31 Mar 32	1 Apr 27	2 Apr 25	3 Apr 21	4 Apr 24	5 Apr 35

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 37	31 Mar 32	1 Apr 27	2 Apr 25	3 Apr 21	4 Apr 24	5 Apr 35
6 Apr 28	7 Apr 34	8 Apr 42	9 Apr 27	10 Apr 47	11 Apr 39	12 Apr 48
13 Apr 24	14 Apr 31	15 Apr 21	16 Apr 27	17 Apr 44	18 Apr 53	19 Apr 68
20 Apr 54	21 Apr 42	22 Apr 52	23 Apr 30	24 Apr 35	25 Apr 37	26 Apr 47
27 Apr 46	28 Apr 47	29 Apr 37	30 Apr 52	1 May 48	2 May 32	3 May 37

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 46	28 Apr 47	29 Apr 37	30 Apr 52	1 May 48	2 May 32	3 May 37
4 May 34	5 May 40	6 May 28	7 May 31	8 May 35	9 May 37	10 May 26
11 May 26	12 May 25	13 May 37	14 May 44	15 May 48	16 May 50	17 May 34
18 May 45	19 May 39	20 May 59	21 May 64	22 May 59	23 May -	24 May -
25 May -	26 May -	27 May -	28 May -	29 May -	30 May -	31 May -

Health Advice For People Living In
Saku

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 On
Car FilterMust
N95 MaskMust
Stay IndoorMust

Must turn on the air purifier to enjoy fresh air.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

Saku

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

Mid. Chances of Asthma

Asthma

Risk of Asthma symptoms is Mid. when AQI is Moderate (50-150)

Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.

Do's :

Limit outdoor activities when AQI is poor.
Clean indoor air with an air purifier to reduce exposure.
Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.

Don'ts :

Exercise outdoors without a mask.
Stay in smoky areas with strong fumes.

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

Nishi, Japan

Taragi, Japan

Izuo, Japan

Osaka, Japan

Yao, Japan

Sayama, Japan

Yawata Shimizui, Japan

Ide, Japan

Otsu, Japan

10.

Fujiidera, Japan

Moderate

4xabove Standard

Last Updated: 23 May 2025, 07:48 AM

AQI City Rankings

Air Quality Solutions For Saku
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 Saku

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 Saku

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 Saku

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 Saku

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.

Saku'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 Saku

Frequently Asked Questions About Air Quality

What is the current AQI level in Saku?

The current real-time AQI level in Saku is 53 (Moderate). This was last updated 2025-05-23 04:39:46 PM (Local Time).

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

The best AQI level was 28 (Good) at 12:09 AM (Local Time) during the last 24 hours.

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

The worst AQI level was 66 (Moderate) at 2:09 AM (Local Time) during the last 24 hours.

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

The AQI levels in Saku have been fluctuating throughout the last 24 hours. The levels have increased by highest 66 at 2:09 AM (Local Time), lowest 28 at 12:09 AM (Local Time).

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

Current AQI levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.