San Bernardino Radon Risks: A Homeowner's Essential Guide

When you look out at the San Bernardino Mountains, it is easy to appreciate the stunning landscape that defines our region here in the Inland Empire. However, the same geological forces that created this scenery can also introduce a silent, invisible hazard into our homes: radon gas. As a home inspector with Marine One Property Inspections, I often speak with homeowners in San Bernardino and Riverside who are unaware of the risks lurking right beneath their foundations.

Radon is a naturally occurring radioactive gas that comes from the decay of uranium in soil and rock. You cannot see it, smell it, or taste it. Because it is odorless and colorless, the only way to know if your home has elevated levels is to test for it. With my background as a building and electrical contractor spanning over 30 years, I have learned that what you can't see can often hurt you—but it can also be managed with the right knowledge.

Why the Inland Empire is Susceptible

Many homeowners assume radon is only a problem in other parts of the country, but the geology here in California creates specific risk factors. The Inland Empire, including cities like San Bernardino and Riverside, has diverse soil types that can trap and release radon gas. Changes in atmospheric pressure and the distinct ventilation habits we use during our hot summers and cooler winters can actually draw this gas into our living spaces through cracks in foundations, expansion joints, or even gaps around utility pipes.

We serve a wide area ranging from Temecula to Orange County, and we see variations in radon levels from neighborhood to neighborhood. A home next door might test completely differently from yours. That is why relying on regional averages is not a safe bet for your specific property. A professional assessment is the only way to gain peace of mind.

How Professional Radon Testing Works

At Marine One Property Inspections, we take a scientific approach to detection. We do not rely on DIY charcoal kits that can be easily compromised by humidity or improper handling. Instead, we utilize professional Radon Testing Monitoring. This involves placing a continuous monitor in the lowest livable level of the home—usually a bedroom or office in the basement or ground floor.

The monitor sits and samples the air every hour, typically over a minimum period of 48 hours. This data collection allows us to see fluctuations and calculate an accurate average concentration. Because I am Radon Certified and InterNACHI® Certified, I follow strict protocols regarding monitor placement and environmental conditions to ensure the results are defensible and reliable. We are not just guessing; we are gathering data that you can use to make critical decisions about your living environment.

Understanding Your Results and Next Steps

Once the testing period is complete, we analyze the data and provide you with a clear, easy-to-read report. The results are measured in picocuries per liter (pCi/L). While the EPA suggests taking action if levels are at or above 4.0 pCi/L, the World Health Organization recommends considering mitigation even at lower levels, such as 2.0 pCi/L. It is important to remember that no home is "radon-free," but the goal is to reduce the concentration to as low as reasonably achievable.

If your San Bernardino home shows elevated levels, do not panic. Radon mitigation is a standard home repair that usually involves installing a ventilation system to redirect the gas from beneath the slab to the outside air above the roof. While we perform the inspections, my decades of experience in building and electrical contracting allow me to identify the structural entry points during a standard Residential Property Inspection, which can be invaluable information for the mitigation specialist you hire.

Schedule Your Inspection Today

Your family's health is too important to leave to chance. Whether you are buying a new home in San Bernardino, selling a property in Riverside, or simply want to ensure the safety of your current residence, Marine One Property Inspections is here to help. We are licensed and insured, and we bring a level of thoroughness to the job that comes from 15 years of building inspections and 30 years in the construction trades.

We are ready to assist you across the Inland Empire, from Temecula to Anaheim and beyond. If you have questions about radon or need to schedule a comprehensive inspection, reach out to us today. Let us use our expertise and technology to help you breathe easier in your home.