Air quality in Waterloo, Iowa, United States of America today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Waterloo, Ontario, Canada

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Waterloo, Iowa is classified as USG for today. The primary pollutant identified is PM2.5 (fine particles). Measurements from five valid observations show a PM2.5 concentration of 51.16 µg/m³.

Data are shown via OpenAQ and reflect the current monitoring results. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The current station data listed for this city is focused on particulate matter (PM). Only one monitoring row is available, and it reports a single pollutant: PM2.5 measured in micrograms per cubic metre. The recorded values are uniform across the dataset, with a minimum, median and maximum all equal to 8 µg/m³, and the same figure appears at both the 10th and 90th percentiles.

All of the timestamps associated with this row are classified as unknown, meaning there is no information on when the measurement was taken. Consequently, the data cannot be described as fresh or recent, and it does not provide a sense of temporal variation for Waterloo, Iowa. With just one station contributing a single pollutant reading and no clear timing, the dataset offers only a very limited snapshot of air quality; conditions across different neighborhoods or at other times may differ from what is captured here.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The current dataset for Waterloo, Iowa includes five valid measurements and was refreshed recently, with the latest update recorded on 2026-02-10 at 22:00 UTC; it is labeled as Updated within 3 days. These values represent a snapshot in time and may not reflect conditions elsewhere in the city or later periods, as air quality can vary by location and moment.

OpenAQ station rows