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Sector 21 Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2026-08-12 02:01 (Local Time)

This is a Community Monitor data by Anonymous Contributor

Live AQI

137AQI (US)

Air Quality is

Poor

PM2.5 : 50 µg/m³

pm10 : 81.93 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

28 °C

Last Updated: 2026-08-12 02:01 (Local Time)

Rank34^th

Currently, Noida ranks 34^th among the most polluted cities globally.

Map

Sector 21

Major Air Pollutants
Sector 21

Particulate Matter(PM₂.₅)

50µg/m³

Particulate Matter(PM₁₀)

81.93µg/m³

TVOC(TVOC)

0.35ppm

Noise(NOISE)

69dB

AQI Graph

Historical Air Quality Data
Sector 21

24 Hours

AQI (US)

Sector 21

AQI (US)

11-08-2026Time12-08-2026

Time	Sector 21
2:01am	102
2:31am	107
3:01am	134
3:31am	144
4:01am	151
4:31am	158
5:01am	152
5:31am	153
6:01am	157
6:31am	147
7:01am	157
7:31am	157
8:01am	157
8:31am	158
9:01am	159
9:31am	154
10:01am	151
10:31am	156
11:01am	168
11:31am	179
12:01pm	179
12:31pm	175
1:01pm	183
1:31pm	165
2:01pm	165
2:31pm	156
3:01pm	161
3:31pm	163
4:01pm	161
4:31pm	156
5:01pm	144
5:31pm	137
6:01pm	139
6:31pm	134
7:01pm	137
7:31pm	147
8:01pm	142
8:31pm	153
9:01pm	149
9:31pm	154
10:01pm	158
10:31pm	153
11:01pm	151
11:31pm	144
12:01am	149
12:31am	139
1:01am	139
1:31am	144
2:01am	137

102

Min. AQI (US)2:01am

183

Max. AQI (US)1:01pm

Want air quality data?

AQI (US) Trends - Annual Air Quality Changes
Sector 21, Noida, Uttar Pradesh, India

AQI (US)

India's Metro Cities
Air Quality Index

Ahmedabad

Bangalore

Chennai

Hyderabad

Kolkata

Mumbai

New Delhi

149

Pune

Air Quality Calendar 2026
Sector 21

2026

AQI (US)

Health Advice For People Living In
Sector 21

2.8Cigarettes per day

Weekly 19.6 Cigarettes

Monthly 84 Cigarettes

Breathing the air in this location is as harmful as smoking 2.8 cigarettes a day.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI (US)

Air PurifierTurn On

Car FilterMust

N95 MaskMust

Stay IndoorMust

Prevent Health Problems: Understand Your Risks

Sector 21

Asthma

Heart Issues

Allergies

Sinus

Cold/Flu

Chronic (COPD)

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2026
India

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

Gurugram, Haryana

Unhealthy

5xabove Standard

Pali, Rajasthan

Unhealthy

6xabove Standard

Rewari, Haryana

Unhealthy

5xabove Standard

Ludhiana, Punjab

Unhealthy

5xabove Standard

Gurgaon, Haryana

Unhealthy

5xabove Standard

Buxar, Bihar

Unhealthy

5xabove Standard

Saharanpur, Uttar Pradesh

Unhealthy

5xabove Standard

Greater Noida, Uttar Pradesh

Unhealthy

5xabove Standard

Dhanbad, Jharkhand

Unhealthy

4xabove Standard

10.

Faridabad, Haryana

Unhealthy

4xabove Standard

Last Updated: 11 Aug 2026, 08:42 PM

AQI City Rankings

Air Quality Solutions For Sector 21
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 Sector 21

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.

Sector 21's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Air Quality FAQs
at Sector 21

Frequently Asked Questions About Air Quality

1. What is the current AQI (US) level in Sector 21?

The current real-time AQI (US) level in Sector 21 is 137 (Poor). This was last updated 2026-08-12 02:01 (Local Time).

2. When was the best AQI (US) level in Sector 21 in the last 24 hours?

The best AQI (US) level was 102 (Poor) at 2:01 AM (Local Time) during the last 24 hours.

3. When was the worst AQI (US) level in Sector 21 in the last 24 hours?

The worst AQI (US) level was 183 (Unhealthy) at 1:01 PM (Local Time) during the last 24 hours.

4. What is the current trend of AQI (US) levels in Sector 21 during last 24 hours?

The AQI (US) levels in Sector 21 have been fluctuating throughout the last 24 hours. The levels have increased by highest 183 at 1:01 PM (Local Time), lowest 102 at 2:01 AM (Local Time).

5. What actions are recommended as per the current AQI (US) level in Sector 21?

Current AQI (US) levels are unhealthy for Sensitive individuals, they should reduce prolonged or heavy outdoor exertion.