EARTH · RADIATION WATCH · CA
Radiation Levels in Los Angeles
The latest background-radiation reading from the EPA RadNet fixed gamma monitor at Los Angeles, CA — a US government sensor that reports a dose ratein nanosieverts per hour, updated roughly hourly. The figure below is live, shown with the time it was taken, and framed against typical natural background — a measurement, never a safety verdict.
What this reading means
Typical natural background radiation sits around 0.05–0.20 µSv/h (50–200 nSv/h)— the everyday range that comes from cosmic rays, the ground, and the air. Los Angeles’s monitor will normally read somewhere in or near that band. A reading a little above it isn’t automatically a concern: altitude and local geology (granite bedrock in particular) naturally lift the background in some places. This page shows the number and its context; it doesn’t interpret it as safe or unsafe. If a reading ever matters to you, consult EPA RadNet directly.
About this monitor
EPA RadNet is the US Environmental Protection Agency’s national network of fixed monitors, built to watch for any change in environmental radiation. Each station reports a native dose-equivalent rate in nanosieverts per hour and its data is approved on a short lag, so the newest figure for Los Angelesmay be a few hours old. The monitor sits in or near the city — we show it as the station city, not an exact street pinpoint.
Nearby monitors
The closest EPA RadNet stations to Los Angeles— compare the readings across the region.