Air quality in Alhambra, California, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Alhambra, California, 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 Alhambra, California is rated as Good today. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 8.878 µg/m³ based on five valid observations reported through OpenAQ.

Overall conditions meet the criteria for a Good category, reflecting low levels of fine particulate matter in the atmosphere. 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 Alhambra air‑quality feed contains a single monitoring location – Story Park – that reports six different measurements: PM1, PM10, PM2.5, relative humidity, temperature and particle count (UM003). Across the whole dataset there are five recent rows (updated within the last seven days) and one older row, so most of the available data is fairly fresh but a small portion dates back further than a month.

PM1 is recorded at 5.35 µg/m³, PM10 at 0.43 µg/m³ and PM2.5 at 8.88 µg/m³, each with identical minimum, median and maximum values because only one recent reading exists for each pollutant. Relative humidity sits at 55.38 % and temperature at 18.11 °C, again reflecting a single snapshot. The particle‑count sensor (UM003) reports 1 074.53 particles per cubic centimetre. Because every metric shows the same value for its range, there is no observable spread in the data; the dataset captures essentially one moment in time rather than a distribution of conditions.

The timestamp information highlights that the most recent updates were made on 2026‑02‑11 at 00:00 UTC for PM1, PM2.5, relative humidity, temperature and UM003, while the PM10 reading is older, last updated on 2025‑01‑13 at 23:00 UTC. This uneven timing means that most pollutants have very current information, but PM10 lags behind by more than a year. Consequently, while the dataset provides a clear picture of several key air‑quality parameters for Story Park, it does not capture variability across different locations in Alhambra or changes over time, and users should keep in mind that conditions elsewhere in the city may differ from this single point observation.

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 five valid measurements and was Updated today (last refreshed on 2026‑02‑11T00:00:00+00:00). These readings provide a current snapshot of air quality for Alhambra, California, but conditions can differ across neighborhoods and change throughout the day. Use this information as a general guide rather than a precise, location‑specific forecast.

OpenAQ station rows