Guide2 min
Do Air Purifiers Actually Work? A Practical Guide
HEPA purifiers can cut indoor PM2.5 — but they are not magic. Room sizing, filter maintenance, and knowing when to ventilate instead.
Jul 17, 2026 · Aether Editorial
Read guideAir quality knowledge
Air quality guides
In-depth, original articles written by the Aether team. Learn how to read AQI, protect your health, plan outdoor exercise, and understand pollution patterns — with practical advice for any city worldwide.
36 original guides written by the Aether team — covering AQI basics, health, exercise, smoke, indoor air, and seasonal patterns worldwide.
Guide1 min
Can Bad Air Quality Cause Headaches? Symptoms to Watch For
Headaches, sore throat, and tiredness on smoggy days are common. Learn pollution symptoms vs allergies, and when to check your local AQI.
Jul 16, 2026 · Aether Editorial
Read guideGuide1 min
Heat Waves and Air Quality: Why Hot Days Can Mean Worse Air
Extreme heat traps pollution and builds ozone. Learn why AQI often worsens during heat waves and how to stay safe when temperature and smog peak together.
Jul 15, 2026 · Aether Editorial
Read guide- Guide1 min
Air Quality for Pets: How Smog and Smoke Affect Dogs and Cats
Dogs and cats breathe the same air you do — often closer to the ground. Learn when to shorten walks, signs of smoke stress, and how PM2.5 affects pets.
Jul 14, 2026 · Aether Editorial
Read guide - Guide2 min
US AQI vs EU AQI: Why Air Quality Scales Differ Worldwide
The same PM2.5 reading can show different colours in the US, Europe, and Asia. Learn how global AQI scales compare and how to read international air quality data.
Jul 13, 2026 · Aether Editorial
Read guide - Guide2 min
Air Quality and Pregnancy: Safe AQI Levels for Expecting Mothers
PM2.5 during pregnancy matters for mother and baby. Practical guidance on safe outdoor time, commutes, and indoor air when you are expecting.
Jul 12, 2026 · Aether Editorial
Read guide - Guide2 min
Ozone and Smog Explained: Why Summer Afternoons Spike AQI
Ground-level ozone drives summer smog in cities worldwide. Learn how it forms, why it peaks in the afternoon, and how to protect yourself when ozone — not PM2.5 — raises your AQI.
Jul 11, 2026 · Aether Editorial
Read guide - Guide2 min
When Should You Wear a Mask for Air Quality?
Masks help during smoke and high PM2.5 — but not every hazy day needs one. Learn which AQI levels justify N95 or KN95 protection and how to wear them effectively.
Jul 10, 2026 · Aether Editorial
Read guide - Guide2 min
Air Quality and Asthma: Which AQI Levels Should You Worry About?
Asthma and air pollution are a sensitive pairing. Learn AQI bands that warrant caution, how to time outdoor activity, and when indoor air is the safer choice.
Jul 9, 2026 · Aether Editorial
Read guide - Guide2 min
Indoor vs Outdoor Air Quality: Which Is Worse?
Indoor air is not always cleaner than outside. Learn when to ventilate, when to seal up, and how cooking, pets, and outdoor PM2.5 shape the air you breathe at home.
Jul 8, 2026 · Aether Editorial
Read guide - Guide3 min
Air Quality for Babies: What Every Parent Should Know
Air quality for babies and newborns — safe PM2.5 levels, nursery tips, stroller outings, and when an air purifier for the baby room makes sense.
Jul 7, 2026 · Aether Editorial
Read guide - Guide3 min
Humidity and Air Quality: What's the Connection?
Humidity and air quality interact in ways that affect PM2.5, smog, and how muggy air feels — learn what high humidity means for your AQI.
Jul 6, 2026 · Aether Editorial
Read guide - Guide3 min
Does Bad Air Quality Affect Your Sleep?
Air quality and sleep are linked — learn how PM2.5, overnight AQI, and bedroom air affect rest, and whether to open windows at night.
Jul 5, 2026 · Aether Editorial
Read guide - Guide3 min
Best Time of Day for Fresh Air — When Is AQI Usually Lowest?
When is AQI usually lowest near you? Compare morning vs evening air quality, rush-hour pollution, and how to schedule cleaner outdoor time.
Jul 4, 2026 · Aether Editorial
Read guide - Guide4 min
Air Quality Myths Debunked: What Most People Get Wrong
Air quality myths and AQI misconceptions — from wind and rain to indoor air — debunked with plain facts so you can read your local AQI with confidence.
Jul 3, 2026 · Aether Editorial
Read guide - Guide4 min
What Counts as a Good AQI Number?
What is a good AQI number for daily life? Learn safe colour bands, acceptable ranges for sensitive groups, and when to adjust outdoor plans.
Jul 2, 2026 · Aether Editorial
Read guide - Guide3 min
How Wildfires Thousands of km Away Affect Your Local AQI
How wildfires thousands of km away affect your local AQI: smoke transport, PM2.5 spikes far from the flames, and what to do when distant fires cloud your sky.
Jul 1, 2026 · Aether Editorial
Read guide - Guide3 min
Workout AQI Limits: Running, Cycling, and Yard Work
AQI safety limits for different outdoor activities — compare running, cycling, and hard yard work by AQI band and who should take extra care.
Jun 30, 2026 · Aether Editorial
Read guide - Guide3 min
Does Rain Actually Clean the Air?
Does rain actually clean the air? Learn how rainfall washes out PM2.5 and pollen, when it helps AQI most, and why some storms leave pollution worse than before.
Jun 29, 2026 · Aether Editorial
Read guide - Guide3 min
Why Does Air Quality Get Worse at Night?
Why does air quality get worse at night? Temperature inversions, calm winds, and evening emissions often push PM2.5 and AQI higher after sunset.
Jun 28, 2026 · Aether Editorial
Read guide - Guide1 min
How Traffic Congestion Affects Air Pollution Along the N1
Stop-and-go commuting along the N1 corridor pumps out NO₂ and PM2.5 — especially at peak hours.
Jun 27, 2026 · Aether Editorial
Read guide - Guide1 min
Wildfire Smoke and Air Quality — Smoke AQI Guide
How wildfire smoke drives smoke AQI into hazardous ranges — and practical steps to protect your lungs.
Jun 26, 2026 · Aether Editorial
Read guide - Guide1 min
Understanding Air Quality Near Mpumalanga's Power Stations
An introduction to sulfur dioxide, coal combustion, and industrial air quality in South Africa's energy heartland.
Jun 26, 2026 · Aether Editorial
Read guide - Guide1 min
What Does AQI Mean? AQI 100, 150, 200 Explained
Plain-language guide to AQI numbers — what is safe, what is dangerous, and what to do at each level.
Jun 25, 2026 · Aether Editorial
Read guide - Guide1 min
When AQI Is Orange (101–150): Should You Exercise Outside?
AQI 101–150 is unhealthy for sensitive groups. Learn who should skip outdoor workouts, how hard healthy adults can train, and when to move inside.
Jun 25, 2026 · Aether Editorial
Read guide - Guide1 min
How to Check Air Quality Near Me
A simple guide to finding live AQI for your location using free air quality trackers on phone or desktop.
Jun 24, 2026 · Aether Editorial
Read guide - Guide1 min
The Difference Between Seasonal Allergies and Bad Air Quality
Itchy eyes and a runny nose could be pollen — or pollution. Here is how to tell the difference.
Jun 24, 2026 · Aether Editorial
Read guide - Guide1 min
Air Quality and Running — When Is It Safe to Exercise Outdoors?
AQI thresholds for runners, joggers, and cyclists — and how to adjust outdoor workouts when pollution is elevated.
Jun 23, 2026 · Aether Editorial
Read guide - Guide1 min
Why Do I Wake Up With a Stuffy Nose Every Morning?
Overnight indoor air pollution, dry air, and poor ventilation can affect sinuses while you sleep.
Jun 23, 2026 · Aether Editorial
Read guide - Guide1 min
Is It Safe to Go Outside Today?
How to check air quality today, read AQI safe levels, and decide whether outdoor plans make sense for you and your family.
Jun 22, 2026 · Aether Editorial
Read guide - Guide1 min
Dust Storms and Your Health: What to Do When the Wind Picks Up
Strong winds lift PM10 and PM2.5 — here is how to protect yourself when dust fills the air.
Jun 22, 2026 · Aether Editorial
Read guide - Guide1 min
How Wood Smoke Affects Winter Air Quality in Cape Town
Fireplace smoke and valley trapping can push PM2.5 up in Cape Town suburbs on still winter nights.
Jun 21, 2026 · Aether Editorial
Read guide - Guide1 min
Why Is the Air Hazy in Gauteng Today?
Winter smog, crop burning, traffic, and weather inversions often explain hazy skies over Johannesburg and Pretoria.
Jun 20, 2026 · Aether Editorial
Read guide - Guide2 min
Seasonal air quality patterns
Why smoke, pollen, temperature inversions, and wind can shift readings through the year.
Jun 15, 2026 · Aether Editorial
Read guide - Guide2 min
PM2.5 vs PM10: What's the difference?
A plain-language guide to the fine particles most commonly shown on air quality dashboards.
Jun 8, 2026 · Aether Editorial
Read guide - Guide2 min
Understanding the Air Quality Index
What AQI numbers mean, how they are calculated, and when to adjust your outdoor plans.
Jun 1, 2026 · Aether Editorial
Read guide