Air quality in Norwich, Connecticut, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Norwich, England, United Kingdom

⚠️ 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 Norwich, Connecticut is classified as Good today. The primary pollutant measured is PM2.5 (fine particles). Data from nine valid measurements show a PM2.5 reference value of 5.24 µg/m³ and a PM10 reference value of 18.0 µg/m³.

These figures are presented through OpenAQ, reflecting the current monitoring results for the city. 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 Norwich air‑quality record draws from a single monitoring location at Canterbury Turnpike, so the dataset reflects one row of observations rather than a network of stations. All five pollutants tracked by OpenAQ are present: PM1, PM2.5, relative humidity, temperature and UM003 (particle count). Each measurement was last updated on 2026‑02‑11 01:00 UTC, meaning the data are fresh within the past month and meet the “updated within 30 days” criterion.

Across the five variables the reported values are identical for their minimum, median and maximum, indicating that only one reading is available for each pollutant. PM1 registers at 1.0443333337704341 µg/m³, while PM2.5 is measured at 5.241666666666666 µg/m³. Relative humidity stands at 39.95516681671142 %, temperature at 6.215166656176248 °C and the UM003 particle concentration at 273.9725006103515 particles/cm³. Because there is no spread in the data, typical (median) values are exactly the same as the extremes for every pollutant.

The single‑station coverage means that spatial variation within Norwich cannot be captured; conditions may differ elsewhere in the city or at other times of day. Nonetheless, the dataset provides a fully current snapshot for each listed contaminant, with all measurements recorded on the same recent timestamp.

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 data shown reflects nine valid measurements and was updated today (2026‑02‑11T01:00:00+00:00). These values represent the most recent monitoring results for Norwich, Connecticut, but air quality can vary across different neighborhoods and at different times of day, so this snapshot may not capture all local conditions.

OpenAQ station rows