What is EPA's Action Level for Radon and What Does it Mean?
Nov 12, 2025 · Radon is found in outdoor air and in the indoor air of buildings of all kinds. The EPA recommends homes be fixed if the radon level is 4 pCi/L (picocuries per liter) (150 becquerels per …
Radon levels: What do they mean? - Airthings
Radon exposure is typically quantified in becquerels per cubic meter (Bq/m³). However, in the United States, the commonly used unit of measurement is picocuries per liter (pCi/L).
Radon and Your Health | Radon | CDC
6 days ago · EPA recommends installing a system if your radon level is at or above 4 picocuries per liter (pCi/L) of air. A "picocurie" is a common unit for measuring the amount of radioactivity. You can find …
What Level of Radon Gas is Really Acceptable in my Home?
Radon mitigation systems are designed to actively reduce radon levels in your home by safely venting the gas outdoors before it has a chance to build up. This system prevents radon from accumulating …
Radon Basics | National Radon Program Services
When testing measures radiation from the progeny, rather than radon itself, the measurements are usually expressed in working level (WL) units. When radiation from radon is measured directly, the …
Understanding Acceptable Radon Levels: A Complete Guide
Apr 30, 2025 · What Are Acceptable Radon Levels? The U.S. Environmental Protection Agency (EPA) has set the radon action level at 4 picocuries per liter (pCi/L) of air. If your radon test reveals levels at …
Radon: Units of Measure - ICRPaedia
Mar 5, 2019 · Radon concentrations in air are usually measured in becquerels per cubic meter (Bq/m 3). That’s the amount of radon (becquerels) in a volume of air (cubic metre). Worldwide, the average …
Radon mitigation systems and how they work
Dec 4, 2025 · The Environmental Protection Agency (EPA) recommends taking action if radon levels in your home are at or above 2 picocuries per liter (pCi/L). This is where radon mitigation systems …
Is Your Home Safe? Decoding the EPA's Radon Action Level
Jul 31, 2024 · Radon levels are measured in picocuries per liter (pCi/L) and working levels (WL), each indicating the concentration of radon or its decay products. Knowing these units helps in evaluating …
Radon Mitigation Systems Explained: What Works Best
6 days ago · This guide will break down radon mitigation systems, how they work, and what to expect when choosing the right solution for your home.