To meet the requirements set forth in the Code of Colorado Regulation, 6 CCR 1010-6, initial District-wide radon testing was performed in 1991.  However, the regulation requires that all building additions and remodels constructed after the initial testing be re-tested for radon.   

Radon is a cancer-causing radioactive gas. You cannot see, smell or taste radon. The Surgeon General has warned that radon is the second leading cause of lung cancer in the United States today. If you smoke and you are exposed to high radon levels, you’re at high risk for developing lung cancer. Some scientific studies of radon exposure indicate that children may be more sensitive to radon. This may be due to their higher respiration rate and their rapidly dividing cells, which may be more vulnerable to radiation damage.

Testing is the only way to determine whether or not the radon concentration in a school room is below the action level. Testing is only performed in frequently occupied rooms including classrooms, offices, labs, cafeterias, libraries, auditoriums and gymnasiums on the ground level.  

EPA recommends that schools take action to reduce the level of radon when levels are 4 pCi/L (or 0.02 WL) or higher.  Below are the results from the 2017 testing.  If any samples are higher than 4 pCi/L, we will follow up with additional testing and will post those results.

Additional information on radon can be found on the following links:

National Safety Council Information on Radon

EPA Radon in Schools


2020 Radon Sampling Results

Clyde Miller





2017 Radon Sampling Results

Century Results

Columbia Results

Crawford Radon Results


More Dartmouth Results

*Retest - Dartmouth follow-up 2017

District Stadium Results

District Warehouse Results

East Results
*A1 and E9 test kits missing from room so results are unavailable.

ESC 1 Results

ESC 2 Results

ESC 4 Results

Facility Results

Gateway Results

Iowa Results
*Rm F missing so results are unavailable.

IT Results

Jamaica Results

Kenton Results

Laredo Results
*Rm 11 test kit missing so results are unavailable.

Lyn Knoll Results

*Retest - Long Term Results - Lyn Knoll Media LT Retest

*Retest - Long Term Results - Lyn Knoll B5 LT Retest

*Retest - Long Term Results - Lyn Knoll Comp Lab LT Retest

Due to the long term retest results, a radon mitigation system was installed.

Post mitigation retest results - Lyn Knoll Post mit results 2018

North Results

Park Lane Results

Peoria Results
*C14 test kit missing so results are unavailable.

Sable Results

Sixth Ave Results
*Rm C17 test kit missing so results are unavailable.  C4 was not sampled due to flooding in room and will be sampled at a later time.

South Results
*M2, D24, B5, E16, E21, F7 test kits missing so results are unavailable.

Transportation Garage Results

Vaughn Results

Virginia Court Results

Wheeling Results

Yale Results

Past Radon Sampling Results





Aurora Hills


CDC Laredo

Central High School

Clyde Miller


Early Beginings

Elkhart Elementary

*Elkhart VP retest_t




Hinkley High School



Meadowood CDC
*CR 14 retest


Mosley K8


Murphy Creek


Professional Learning Conf Center

Quest K-8


*Retest - RHS Media desk_t

*Retest - RHS Media office 1_t

*Retest - RHS Media office 2_t

*Retest - RHS Media West_t

Side Creek

Tollgate Elementary


Vista Peak Exploratory P-8

Vista Peak Preparatory

*Retest - 1011_t Vista Peak Prep

*Retest - 1024 retest_t Vista Peak Prep

*Retest - 1107_t Vista Peak Prep

*Retest - 1109_t Vista Peak Prep

*Retest - 1414_t Vista Peak Prep

*Retest - Kitchen Office_t Vista Peak Prep



*Retest - West Retest Results 2008

William Smith Kids Tech