The U.S. Army Corp of Engineers conducted a 6-month independent study of the Dry-Fog process at Fort Campbell Army base in Kentucky. Follow up tests were done before and after the Dry-Fog process was using in the buildings and at 1, 3 and 6 month intervals to check the effectiveness of the initial treatment.

Goals of Test (page 2)

The Army Corp of Engineers published the results of a 6 month study they did of the Dry-Fog process. Click the image to download the complete study results.

  1. Demonstrate the dry-fog process via the 2nd generation application system in two buildings at Fort Campbell, KY.
  2. Determine the efficacy and performance (via sampling and analysis) of the dry-fog process.
  3. Verify initial remediation impact(s) and non-reoccurrence of mold/mildew over a test period of 6 months (via sampling and analysis).

Types of Molds Tested (page 9)

These mold types, which are associated with more serious health problems, are often the best indicator of indoor mold issues. The following are typical marker molds:

  • Stachybotrys, known as “black mold,” is considered the most dangerous mold type and is typically found in low numbers, if at all in outdoor samples. This mold has been linked with infant death.
  • Chaetomium, a marker mold that is not commonly found at significant levels indoors and is associated with health problems including fibromyalgia, MS, Lyme disease, and others.

Ability to Treat Areas Liquids Can’t Get (page 14)

The dry fog’s small particle size (much smaller than the mold spores) provides a mechanism to treat areas inaccessible to liquid treatments, and ensures that the fog can physically infiltrate all spaces and porous materials available to mold spores.

Summary of Treatment (page 20)

Indoor mold count dropped from 64,126 spores/m3 before treatment to 3,067 spores/m3 at 6 months after treatment. (building 6733 dropped from 556,057 spores/m3 before treatment to 3,044 spores/m3 at 6 months after treatment.

Test results. Blue shows the spores in the building and Orange shows the spores in the outside air.


Conclusion & Recomendations (page 29)

The sampling results of this demonstration indicate that the Dry-Fog technology was capable of rapidly eliminating mold spores. Results also showed that the second step of the Dry-Fog technology’s (application of EverPURE) continued to reduce mold spore levels over time; with minor exceptions, while total spore counts outdoors increased throughout the demonstration, indoor levels continued to decrease.

This work concluded that the Dry-Fog technology provides rapid and quantifiable improvements to indoor air quality, and also that it drastically reduces exposure of Army building occupants and maintenance workers to harmful chemicals resulting from current mold remediation practices.

You can download the full report here.

* The U.S. Army Engineer Research and Development Center (ERDC) solves the nation’s toughest engineering and environmental challenges. Find out more at