Air quality affects comfort in subtle ways — airflow, dryness, warmth, stillness, and clarity.
This page offers a gentle overview of how the environment shapes daily experience, grounded in guidance from the Colorado Department of Public Health and Environment (CDPHE) and the U.S. Environmental Protection Agency (EPA).
CDPHE explains that air quality conditions are reported using the Air Quality Index (AQI), which summarizes levels of pollutants like ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, and carbon monoxide. These pollutants can affect comfort and health depending on exposure level and duration.
EPA notes that poor indoor or outdoor air quality can influence comfort, concentration, and breathing ease, even at levels below regulatory thresholds. Common contributors include particulate matter, ozone, smoke, and indoor sources like moisture or emissions.
Air Diary does not show AQI numbers. Instead, it helps you notice how the air feels.
Comfort signals are gentle cues from your environment:
These sensations often matter as much as formal AQI categories.
CDPHE notes that visibility and haze (VSI) can also affect how air feels, even when AQI is moderate.
Air Diary helps you notice these patterns over time.
Ground‑level ozone forms when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds. CDPHE notes that short‑term exposure can cause coughing, throat irritation, chest discomfort, and breathing difficulty.
Many people feel ozone as “tight,” “dry,” or “sharp” air.
These tiny particles come from wildfire smoke, dust, industry, and vehicles. CDPHE explains that PM can reduce visibility and create a textured or heavy feeling in the air.
People often feel PM as “grainy,” “dense,” or “stale” air.
EPA notes that indoor air quality can be affected by moisture, ventilation, emissions, and everyday activities. Poor indoor air can influence comfort, concentration, and breathing ease even when outdoor air is good.
Air Diary helps you track both indoor and outdoor comfort signals.
During wildfire season, particulate matter can rise quickly. CDPHE reports that haze‑forming pollution affects visibility and comfort even before AQI reaches unhealthy levels.
This page will offer calm guidance during wildfire periods without alarms or alerts.
Human AQI is a future layer of Air Diary — a gentle way to understand air quality through lived experience.
It is not a separate app.
It will appear here when ready.
Small choices can gently support comfort:
EPA notes that even simple ventilation and moisture management can improve comfort and clarity indoors.