AirAgora library
Direct air-quality answers
Clear answers to common questions about AQI accuracy, app disagreement, pollutants, forecasts, exercise, sensitive groups, and the best time outside.
Start with the short answer, then inspect the evidence boundary, AirAgora behavior, comparison checklist, sources, and related tools.
Explore the collection
16 factual pages
Every page keeps sources, limitations, FAQs, and paths into the real tool.
Can an air-quality forecast be wrong?
Yes. Forecasts are scientific estimates with model, input, resolution, timing, and event uncertainty; verification must preserve the original prediction.
Open page →Can I exercise when air quality is moderate?
A “moderate” category is scheme-specific public information, not an individual exercise clearance; use source context, activity guides, and professional advice.
Open page →How often do air-quality forecasts update? A direct answer
Update timing depends on the source model and provider; AirAgora separates model/source time, valid hour, fetch time, cache age, and page-view time.
Open page →Is AQI accurate?
AQI can accurately apply a named index to its input data, but its relevance depends on source, location, time, averaging, scheme, and whether the value is modeled or observed.
Open page →What does “unhealthy for sensitive groups” mean?
It is a U.S. AQI category from 101–150, not a diagnosis; AirAgora keeps the scheme name, public guidance context, and personal limits explicit.
Open page →What is carbon monoxide in an air-quality forecast?
Carbon monoxide (CO) is a gaseous pollutant reported by OpenWeather as a modeled outdoor concentration; AirAgora keeps that value separate from regulatory AQI and indoor safety decisions.
Open page →What is nitrogen dioxide?
Nitrogen dioxide (NO₂) is a gaseous air pollutant; AirAgora shows modeled concentration and matching concentration-band context without treating the value as a street-level measurement or source attribution.
Open page →What is ozone?
Ozone is a gaseous air pollutant measured near the ground; AirAgora shows modeled concentration and matching concentration-band context without confusing it with the ozone layer or a street-level value.
Open page →What is PM10?
PM10 is particulate matter represented by an aerodynamic-diameter convention of 10 micrometres or smaller, with concentration and concentration-band context kept distinct.
Open page →What is PM2.5?
PM2.5 is particulate matter represented by an aerodynamic-diameter convention of 2.5 micrometres or smaller; AirAgora shows concentration and compatible concentration-band severities.
Open page →What is sulphur dioxide in an air-quality forecast?
Sulphur dioxide (SO₂) is a gaseous pollutant reported by OpenWeather as a modeled concentration; AirAgora keeps its units, provider scale, and forecast limits distinct.
Open page →What is the best time to go outside?
The best time is relative to your location and available forecast; AirAgora compares complete two-hour windows and avoids a safe-for-everyone claim.
Open page →What is the difference between modeled and measured air quality?
Modeled air quality estimates a grid and future hours; measured air quality records one instrument and site. The two sources answer different questions.
Open page →Which air-quality scale does AirAgora use?
AirAgora displays OpenWeather’s official air-pollution scale from 1 to 5 and never relabels it as U.S., European, or local regulatory AQI.
Open page →Why do air-quality apps disagree?
Apps can differ because they use different OpenWeather scales, sources, locations, timestamps, averaging periods, pollutants, model runs, and caching.
Open page →Why does AQI change by hour?
Hourly AQI can change as pollutant fields, weather, model runs, valid times, averaging conventions, and the controlling pollutant component change.
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