Professional Radon Measurement Services in Colorado
Radon measurement determines the concentration of radon gas inside a home or building so property owners can understand their potential exposure and decide whether further action is needed. Colorado Radon Mitigation provides professional radon measurement for Colorado property owners using established measurement practices and clear reporting to help you understand your radon readings and next steps.
What Is Radon Measurement?
Radon measurement is the process of measuring the concentration of radon gas in indoor air over a defined testing period. Because radon cannot be seen, smelled, or tasted, measurement is the only way to determine the radon level inside a specific property.
Results in the United States are generally reported in picocuries per liter of air (pCi/L). The measurement provides a numerical radon reading that can be evaluated against established guidance and used to determine whether additional testing, monitoring, or radon mitigation should be considered.
Professional radon measurement is available for residential, multifamily, and commercial properties, including real estate transactions and schools. The appropriate measurement approach depends on the property type, reason for testing, and conditions within the building.
How Is Radon Measured?
Professional radon measurement involves placing an appropriate measurement device in the property and collecting data under the testing conditions required for that measurement.
The goal is not simply to produce a number. Proper device placement, testing conditions, measurement duration, and interpretation all affect how useful the final radon reading will be.
Colorado Radon Mitigation can help property owners understand both the measurement itself and what the reported radon level means for the property.
Radon Measurement Units
Radon concentrations in the United States are commonly expressed in pCi/L, or picocuries per liter of air. Radon may also be reported internationally in becquerels per cubic meter, or Bq/m³.
For reference, the EPA recommends taking action to reduce radon at 4.0 pCi/L or higher and considering reduction between 2.0 and 4.0 pCi/L.
Radon Readings Can Change
A radon measurement represents conditions during the testing period. Indoor radon levels can fluctuate, so one measurement should be interpreted within the context of the testing conditions, property, and reason for testing.
Professional Radon Measurement Equipment
Colorado Radon Mitigation is licensed and certified to use continuous radon monitors (CRMs), including RadStar continuous radon monitors. The monitors are recalibrated annually through a licensed laboratory. The team also uses passive measurement devices where appropriate, particularly for larger buildings and schools.
Our Radon Measurement Process
We follow a thorough, standardized process to ensure reliable results—so you can make confident decisions about your property.
Property and Testing Review
Before short-term testing, the structure must be maintained under closed-building conditions for at least 12 hours. Colorado Radon Mitigation conducts a property review to verify testing conditions and document relevant conditions, including anomalies or existing soil-gas mitigation systems.
Measurement Device Placement
The radon measurement device is placed in an appropriate location within the property according to the measurement method being used.
Radon Monitoring and Data Collection
Residential radon measurement is typically conducted for a minimum of 48 hours. Longer-term testing may also be performed for periods of up to 92 days depending on the testing objective and property.
Results and Next Steps
After measurement is complete, the results are reviewed and provided to the property owner. When continuous radon monitors (CRMs) are used, customers receive a detailed report with hourly radon readings, with results available when the monitors are collected. When passive devices are used, customers receive a laboratory report, typically within a few business days. If the results indicate elevated radon concentrations, Colorado Radon Mitigation can help determine the appropriate next step.
Why Choose Colorado Radon Mitigation for Radon Measurement?
Local Colorado Experience
Radon conditions can vary from property to property. Working with a local radon professional gives Colorado property owners access to a company that regularly works with radon concerns across the Front Range, including those looking for radon services in Arvada. All of our technicians and management are NRPP-certified and Colorado DORA-licensed in both radon measurement and mitigation. The professionals conducting your assessment, preparing your quote, testing your property, and installing your system are individually licensed and certified. Colorado Radon Mitigation maintains company and individual memberships with the Indoor Environments Association (IEA).
Professional Measurement
Proper radon measurement involves more than placing a device in a room. Measurement conditions, device placement, data collection, and interpretation all contribute to obtaining useful results.
Clear Radon Readings
The purpose of measurement is to give the property owner understandable information about indoor radon concentrations and what those readings may mean.
Measurement and Mitigation Knowledge
If elevated radon levels are identified, Colorado Radon Mitigation also provides residential and commercial radon mitigation services, allowing property owners to understand potential next steps without having to start their research over. Colorado Radon Mitigation is NRPP-certified and Colorado state licensed for radon measurement and mitigation. The company is also a member of AARST, supporting professional measurement practices aligned with recognized industry standards.
What Do Your Radon Measurement Results Mean?
A radon measurement gives you a numerical concentration for radon in the air during the measurement period.
Higher readings may indicate that additional action should be considered. The EPA recommends reducing indoor radon when measurements are 4.0 pCi/L or higher and also recommends considering mitigation when levels fall between 2.0 and 4.0 pCi/L.
A measurement below 4.0 pCi/L does not mean a property will always remain at exactly that level. Radon can fluctuate, and retesting may be appropriate after significant property changes or at other intervals.
If your radon measurement indicates elevated levels, Colorado Radon Mitigation can help you evaluate the appropriate next step, including residential radon mitigation or commercial radon mitigation when applicable.
Professional Radon Measurement vs. DIY Radon Tests
Home radon test kits can provide useful screening information, but professional radon measurement follows specific placement, testing-condition, and quality-control protocols. Colorado Radon Mitigation uses calibrated continuous radon monitors and approved passive measurement methods depending on the property and testing objective. Certified passive testing may also require multiple devices in accordance with applicable measurement standards.
Professional measurement can help reduce common testing issues related to:
- Incorrect device placement
- Improper testing conditions
- Interrupted or incomplete testing periods
- Difficulty interpreting radon readings
- Uncertainty about what should happen after the test
For broader information about professional radon testing services, including available testing options, visit our Radon Testing Services page.
Radon measurement FAQs
How is radon measured in a home?
Radon is measured by placing a radon measurement device in an appropriate indoor location for a defined period. The result represents the concentration of radon in the air and is typically reported in picocuries per liter, or pCi/L, in the United States.
What do radon measurement numbers mean?
A radon reading shows the concentration of radon measured in the air during the testing period. EPA guidance recommends action at 4.0 pCi/L or higher and consideration of mitigation between 2.0 and 4.0 pCi/L.
How long does professional radon measurement take?
Residential radon testing is typically performed for a minimum of 48 hours. Longer-term testing may extend up to 92 days depending on the purpose of the measurement and property conditions.
What type of radon measurement equipment do you use?
Colorado Radon Mitigation uses professional continuous radon monitors, including RadStar CRMs, as well as passive measurement devices when appropriate for the property and testing requirements.
Can radon readings change over time?
Yes. Indoor radon concentrations can fluctuate because conditions inside and around a building change. A radon measurement represents conditions during the measurement period, which is why retesting may sometimes be appropriate.
When should I have radon measured again?
If your home previously tested below 4.0 pCi/L, the EPA advises considering future retesting without specifying a fixed interval. Retesting is recommended if a lower level of the home becomes occupied as living space. If your home has a radon mitigation system, the EPA recommends retesting at least every two years to confirm radon levels remain low.
Understand Your Property’s Radon Levels
Professional radon measurement gives you clear information about the radon concentration inside your property and helps you determine what to do next. Contact Colorado Radon Mitigation to discuss measurement for your Colorado home or property.
- 970-340-8744
Ask about our military, veteran, law enforcement, and first responder discounts. Interest-free and low-interest financing options may also be available. Ask us about current terms and eligibility.
Depending on your property and radon concerns, you may also need additional services such as passive radon system activation, crawl space encapsulation, or radon in water testing. Colorado Radon Mitigation can help determine which services are relevant based on the property and testing results.