Frequent Questions

Why aren't the results for my location up to date? Why are there gaps in data?

The EPA's RadNet monitors are highly sophisticated devices that occasionally require maintenance and repair. Normally, near-real-time air monitoring data are posted to the RadNet website six times daily. Under certain circumstances a delay in data availability may occur (monitor maintenance or repair, or server/network connection issues). When these situations arise, temporary breaks in reporting appear as gaps in available RadNet data. Once the issues are resolved and the RadNet monitor is returned to normal operation, data should begin to appear.

Also, all data collected by the RadNet air monitors are reviewed for anomalies before they are publicly available on the EPA’s website. Anomalous data are reviewed by EPA scientists, and, if validated, will later appear on the website.


For more information about RadNet, visit the RadNet page on

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