Long-form guide
How to Read City and Station AQI Without Fooling Yourself
A field guide to interpreting multi-station AQI, timestamps, dominant pollutants, and forecasts—so you plan school runs and workouts on evidence rather than habit.
City headline vs station reality
A city-level AQI is a summary, often reflecting the strongest current signal among available stations or a consolidated view designed for quick communication. Your neighbourhood may be better or worse than the headline. Always scan station names you recognise—near home, school, or office—before deciding that “the city is fine.”
On Track India AQI city pages, station cards exist for this reason. Sort attention toward the stations that bound your daily routes, not only the single best-looking number on the map.
Timestamps are part of the data
An attractive AQI value with a stale timestamp can mislead. Sensors go offline; feeds lag; overnight data can look artificially calm until morning traffic starts. Prefer readings updated within a recent window, and refresh before outdoor sports or long two-wheeler rides.
If every station is hours old, treat the page as degraded mode: rely more on regional trends, official advisories, and visible haze—then recheck later.
Dominant pollutant changes the plan
Ask two questions: What is the AQI band? What pollutant is driving it? Particle-driven days reward filtration and respirator discipline. Ozone-driven afternoons reward shifting exercise to early morning. NO2-heavy corridors reward avoiding idling traffic canyons when you can.
Charts help you see diurnal patterns. Many people discover that their “usual jogging hour” is consistently the worst hour. Moving a workout by 90 minutes can cut exposure more than buying a new gadget.
Sensitive groups need earlier thresholds
Guidelines written for the general public are not personalised medicine. Children, pregnant people, elders, and patients with asthma, COPD, or heart disease should act earlier—often at Moderate—rather than waiting for Poor. Schools and caregivers can pre-agree indoor alternatives so decisions are not improvised at the gate.
Keep rescue medication accessible on elevated days even if you feel fine at rest. Symptoms often appear after exertion or overnight.
Build a weekly review habit
Once a week, glance at which days spiked, which pollutants led, and how your household felt. That short review turns AQI from a scary headline into a feedback loop. Share patterns with family members who commute at different hours so the household plan is realistic.
For deeper playbooks, use the Health Guide. For local context, open a published city guide. For how we process public feeds, read Methodology. The goal is not perfect prediction—it is fewer avoidable high-dose hours.
Use this with live data
Guides explain the system; dashboards show today’s numbers. After reading, check your city, then apply the Health Guide playbook for the current AQI band.