AQI PM2.5 PM10 CO SO2 NO2 O3

Live

St. Louis Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2025-06-10 08:10:57 AM (Local Time)

Live AQI

Air Quality is

Moderate

pm10 : 38 µg/m³

PM2.5 : 14 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

15 °C

Last Updated: 2025-06-10 08:10:57 AM (Local Time)

Map

St. Louis

Major Air Pollutants
St. Louis

Particulate Matter(PM2.5)

14µg/m³

Particulate Matter(PM10)

38µg/m³

Carbon Monoxide(CO)

179ppb

Sulfur Dioxide(SO2)

1ppb

Nitrogen Dioxide(NO2)

9ppb

Ozone(O3)

18ppb

Trending in United States

Wildfire Smoke in Canada 2025: AQI Impact, Orange Skies, and What to Do

World Environment Day 2025: Why Plastic Pollution in Indian Cities Is a Health Emergency?

How Outdoor Air Pollution Contributes to Rising Diabetes Mortality: A Global Analysis

Wildfire Alert in Northeastern Minnesota: From Crisis to Control Journey.

Big News: AQI App is Now on Apple Watch!

How Air Pollution Fuels COPD—and What You Can Do About It?

The Mask Returns: COVID Cases Spike in Singapore, Hong Kong, and India

Long-Term Exposure to Polluted Air and Its Impact on Heart Health: A Global Perspective

Methane Emissions from Delhi’s Landfills: An Invisible Threat

Carbon monoxide (CO) or PM2.5: Which is more dangerous for human health and the environment?

Case Study : How Prana Air Helped the American School of Bombay in Improving Air Quality?

AQI Graph

Historical Air Quality Data
St. Louis

24 Hours

AQI

St. Louis

Want air quality data?

AQI Trends - Annual Air Quality Changes
St. Louis, Missouri, United States

AQI

Year

AQI

Annual AQI Trends

2025

35AQI

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

NaN%

Rise (Worsened AQI)

Most & Least Polluted Months

Most PollutedJune, 202552AQI

Least PollutedMay, 202531AQI

* This data analysis is from year 2025 - 2025

St. Louis's Locations
Real-time Air Pollution Level

Location

Status

AQI

PM2.5(µg/m³)

PM10(µg/m³)

Temp.(°C)

Humi.(%)

Blair Street

Moderate

Branch Street

Moderate

Clayton Avenue

Moderate

Forest Park

Moderate

Hyde Park

Moderate

Near North Riverfront

Moderate

Patch

Moderate

United States's Metro Cities
Air Quality Index

East Chicago

Los Angeles

Minneapolis

Nashville

New Orleans

New York City

San Francisco

Washington

Air Quality Calendar 2025
St. Louis

2025

AQI

January

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

February

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
26 Jan -	27 Jan -	28 Jan -	29 Jan -	30 Jan -	31 Jan -	1 Feb -
2 Feb -	3 Feb -	4 Feb -	5 Feb -	6 Feb -	7 Feb -	8 Feb -
9 Feb -	10 Feb -	11 Feb -	12 Feb -	13 Feb -	14 Feb -	15 Feb -
16 Feb -	17 Feb -	18 Feb -	19 Feb -	20 Feb -	21 Feb -	22 Feb -
23 Feb -	24 Feb -	25 Feb -	26 Feb -	27 Feb -	28 Feb -	1 Mar -

March

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
23 Feb -	24 Feb -	25 Feb -	26 Feb -	27 Feb -	28 Feb -	1 Mar -
2 Mar -	3 Mar -	4 Mar -	5 Mar -	6 Mar -	7 Mar -	8 Mar -
9 Mar -	10 Mar -	11 Mar -	12 Mar -	13 Mar -	14 Mar -	15 Mar -
16 Mar -	17 Mar -	18 Mar -	19 Mar -	20 Mar -	21 Mar -	22 Mar -
23 Mar -	24 Mar -	25 Mar -	26 Mar -	27 Mar 50	28 Mar 35	29 Mar 36
30 Mar 26	31 Mar 18	1 Apr 32	2 Apr 36	3 Apr 28	4 Apr 28	5 Apr 25

April

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
30 Mar 26	31 Mar 18	1 Apr 32	2 Apr 36	3 Apr 28	4 Apr 28	5 Apr 25
6 Apr 20	7 Apr 29	8 Apr 20	9 Apr 30	10 Apr 41	11 Apr 38	12 Apr 51
13 Apr 39	14 Apr 38	15 Apr 22	16 Apr 35	17 Apr 47	18 Apr 50	19 Apr 45
20 Apr 48	21 Apr 22	22 Apr 37	23 Apr 41	24 Apr 48	25 Apr 34	26 Apr 23
27 Apr 23	28 Apr 35	29 Apr 31	30 Apr 31	1 May 24	2 May 25	3 May 22

May

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
27 Apr 23	28 Apr 35	29 Apr 31	30 Apr 31	1 May 24	2 May 25	3 May 22
4 May 18	5 May 19	6 May 36	7 May 33	8 May 34	9 May 28	10 May 40
11 May 34	12 May 39	13 May 29	14 May 39	15 May 56	16 May 44	17 May 31
18 May 26	19 May 33	20 May 26	21 May 17	22 May 17	23 May 20	24 May 34
25 May 36	26 May 22	27 May 30	28 May 26	29 May 46	30 May 29	31 May 39

June

Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
1 Jun 41	2 Jun 46	3 Jun 61	4 Jun 48	5 Jun 42	6 Jun 53	7 Jun 73
8 Jun 50	9 Jun 54	10 Jun -	11 Jun -	12 Jun -	13 Jun -	14 Jun -
15 Jun -	16 Jun -	17 Jun -	18 Jun -	19 Jun -	20 Jun -	21 Jun -
22 Jun -	23 Jun -	24 Jun -	25 Jun -	26 Jun -	27 Jun -	28 Jun -
29 Jun -	30 Jun -	1 Jul -	2 Jul -	3 Jul -	4 Jul -	5 Jul -

Health Advice For People Living In
St. Louis

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.

Prevent Health Problems: Understand Your Risks

St. Louis

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
United States

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

Bishop, United States

Moderate

6xabove Standard

Blaine, United States

Moderate

6xabove Standard

Socorro, United States

Moderate

6xabove Standard

East Bethel, United States

Moderate

6xabove Standard

Saint Michael, United States

Moderate

6xabove Standard

Maplewood, United States

Moderate

6xabove Standard

St Michael, United States

Moderate

6xabove Standard

Marshall, United States

Moderate

5xabove Standard

Dennison, United States

Moderate

5xabove Standard

10.

Apple Valley, United States

Moderate

5xabove Standard

Last Updated: 10 Jun 2025, 02:27 PM

AQI City Rankings

Air Quality Solutions For St. Louis
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 St. Louis

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 St. Louis

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 St. Louis

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 St. Louis

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.

St. Louis'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

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 St. Louis

Frequently Asked Questions About Air Quality

What is the current AQI level in St. Louis?

The current real-time AQI level in St. Louis is 59 (Moderate). This was last updated 2025-06-10 08:10:57 AM (Local Time).

When was the best AQI level in St. Louis in the last 24 hours?

The best AQI level was 40 (Good) at 9:41 AM, Jun 9, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in St. Louis in the last 24 hours?

The worst AQI level was 61 (Moderate) at 2:11 PM, Jun 9, 2025 (Local Time) during the last 24 hours.

What is the current trend of AQI levels in St. Louis during last 24 hours?

The AQI levels in St. Louis have been fluctuating throughout the last 24 hours. The levels have increased by highest 61 at 2:11 PM, Jun 9, 2025 (Local Time), lowest 40 at 9:41 AM, Jun 9, 2025 (Local Time).

What actions are recommended as per the current AQI level in St. Louis?

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