Air quality in Arvada, Colorado, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Arvada, Colorado, United States of America

⚠️ 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 Arvada, Colorado is rated as Good today. The primary pollutant measured is PM2.5 (fine particles). According to the latest data shown via OpenAQ, the PM2.5 reference value is 0.0 µg/m³, and there are eleven valid measurements supporting this assessment.

Overall conditions meet the Good category criteria based on the available observations. 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 Arvada air‑quality feed currently contains data for six measured pollutants: PM1, PM2.5, PM10, relative humidity, temperature and UM003 (particle count). The dataset is built from 18 individual rows collected at four monitoring stations, but the freshness of those rows varies. Eleven of the rows have been updated within the last seven days, one row is older than thirty days, and six rows lack a recent timestamp altogether. Across all pollutants the most recent measurements were recorded on 2026‑02‑11 at 01:00 UTC, except for PM10 which dates back to 2025‑01‑13 at 23:00 UTC.

For the fine particulate matter series, PM2.5 values range from a minimum of 0 µg/m³ to a maximum of 4.68 µg/m³, with a median of about 1.52 µg/m³ and the central 80 % of observations falling between roughly 0.34 and 3.85 µg/m³. PM1 shows a tighter spread, from 0 to 1.25 µg/m³, a median near 0.64 µg/m³ and a 10‑90 percentile band of 0.13–1.13 µg/m³. The coarser fraction, PM10, is represented by only two recent rows; its values sit between 0.008 µg/m³ and 2.00 µg/m³ with a median of about 1.00 µg/m³.

Humidity measurements span 26.38 % to 53.55 %, centering on a median of 28.36 % and an inter‑percentile range of roughly 27–48 %. Temperature records are between 11.48 °C and 23.58 °C, with a typical value near 12.02 °C; the 10‑90 percentile window runs from about 11.59 °C to 21.27 °C. Particle counts (UM003) vary widely, from 37.63 to 395.40 particles/cm³, a median of 261.09 and a central spread of roughly 82–369 particles/cm³.

Overall the dataset provides recent, detailed information for most pollutants, but coverage is uneven: PM10 relies on older data, and a notable fraction of rows lack current timestamps. Consequently, while the available numbers give a snapshot of conditions at specific sites, they may not capture the full spatial or temporal variability across Arvada.

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 11 valid measurements and was Updated today (last refreshed at 2026‑02‑11T01:00:00+00:00). These values represent a snapshot of air quality across Arvada, Colorado, but conditions can differ by neighborhood, time of day, and local sources. Use this information as a general guide rather than a precise reading for any specific location within the city.

OpenAQ station rows