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Saint Louis Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2026-06-05 12:11:02 (Local Time)

Live AQI

15AQI (US)

Air Quality is

Good

PM2.5 : 1 µg/m³

pm10 : 16 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

17 °C

Last Updated: 2026-06-05 12:11:02 (Local Time)

Map

Saint Louis

Major Air Pollutants
Saint Louis

Particulate Matter(PM₂.₅)

1µg/m³

Particulate Matter(PM₁₀)

16µg/m³

Carbon Monoxide(CO)

146ppb

Sulfur Dioxide(SO₂)

2ppb

Nitrogen Dioxide(NO₂)

5ppb

Ozone(O₃)

39ppb

AQI Graph

Historical Air Quality Data
Saint Louis

24 Hours

AQI (US)

Saint Louis

AQI (US)

04-06-2026Time05-06-2026

Time	Saint Louis
12:31pm	15
1:01pm	15
1:31pm	21
2:01pm	15
2:31pm	8
3:01pm	23
3:31pm	24
4:01pm	27
4:31pm	15
5:01pm	21
5:31pm	23
6:01pm	15
6:31pm	20
7:01pm	22
7:31pm	20
8:01pm	22
8:31pm	21
9:01pm	22
9:31pm	15
10:01pm	25
10:31pm	15
11:01pm	15
11:31pm	22
12:01am	23
12:31am	21
1:01am	20
1:31am	23
2:01am	21
2:31am	15
3:01am	15
3:31am	15
4:01am	15
4:31am	15
5:01am	15
5:31am	22
6:01am	21
6:31am	15
7:01am	21
7:31am	15
8:01am	22
8:31am	15
9:01am	15
9:31am	24
10:01am	23
10:31am	20
11:01am	15
11:31am	15
12:01pm	25

Min. AQI (US)2:31pm

Max. AQI (US)4:01pm

Want air quality data?

AQI (US) Trends - Annual Air Quality Changes
Saint Louis, Grand Est, France

AQI (US)

Saint Louis's Locations
Real-time Air Pollution Level

locations

Status

AQI (US)

PM₂.₅(µg/m³)

PM₁₀(µg/m³)

Temp.(°C)

Humi.(%)

Cc 3 Borders

Good

France's Metro Cities
Air Quality Index

Lyon

Marseille

Montpellier

Nantes

Paris

Strasbourg

Toulouse

Air Quality Calendar 2026
Saint Louis

2026

AQI (US)

Most Polluted Cities 2026
France

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

Most Polluted Cities Live Ranking 2026

World's Most PollutedCity Rankings (2025)

World's Most PollutedCountry Rankings(2025)

RankCityAQI Status

Standard Value

Gap, Provence Alpes Cote dAzur

Good

3xbelow Standard

Le Petit Quevilly, Normandie

Good

15xbelow Standard

Beauvais, Hauts de France

Good

8xbelow Standard

Dax, Nouvelle Aquitaine

Good

8xbelow Standard

Nantes, Pays de la Loire

Good

15xbelow Standard

Chateauroux, Centre Val De Loire

Good

15xbelow Standard

Toulon, Provence Alpes Cote dAzur

Good

5xbelow Standard

Chalon Sur Saone, Bourgogne Franche Comte

Good

15xbelow Standard

Nevers, Bourgogne Franche Comte

Good

15xbelow Standard

10.

Cherbourg, Normandie

Good

15xbelow Standard

Last Updated: 05 Jun 2026, 10:16 AM

AQI City Rankings

Air Quality Solutions For Saint 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

Prana Air offers the solutions of air quality monitoring and clean air machine for Saint 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 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.

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 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.

Saint 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

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 Saint Louis

Frequently Asked Questions About Air Quality

1. What is the current AQI (US) level in Saint Louis?

The current real-time AQI (US) level in Saint Louis is 15 (Good) due to recent rainfall by 0.08mm/hr. This was last updated 2026-06-05 12:11:02 (Local Time).

2. When was the best AQI (US) level in Saint Louis in the last 24 hours?

The best AQI (US) level was 8 (Good) at 2:31 PM, Jun 4, 2026 (Local Time) during the last 24 hours.

3. When was the worst AQI (US) level in Saint Louis in the last 24 hours?

The worst AQI (US) level was 27 (Good) at 4:01 PM, Jun 4, 2026 (Local Time) during the last 24 hours.

4. What is the current trend of AQI (US) levels in Saint Louis during last 24 hours?

The AQI (US) levels in Saint Louis have been fluctuating throughout the last 24 hours. The levels have increased by highest 27 at 4:01 PM, Jun 4, 2026 (Local Time), lowest 8 at 2:31 PM, Jun 4, 2026 (Local Time).

5. What actions are recommended as per the current AQI (US) level in Saint Louis?

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