ERMI Testing vs. Non-Viable Mold Air Samples

Mold kits don't work. Mold needs food and water to grow. The home kits start out with food and water, but then they sit on store shelves, hot loading docs, warehouse inventory with no expiration dates. You get the idea. And those kits usually require you to pay an extra fee to send the Petri dish to an environmental lab. Even after paying a lab you still don't know if you have a mold problem. You need to compare the outside airborne level of spores with inside airborne spore levels. And some spores fall faster than others.

mold petri dish

ERMI Testing vs. Non-Viable Mold Air Samples

ERMI stands for the Environmental Relative Moldiness Index

This sampling is a combination of EPA research, powerful PCR technology, and a new method to screen buildings for mold and other contaminants. It was developed by scientists at the EPA to provide a straightforward, objective, and standardized way to obtain results for indoor air quality investigations. The EPA is developing an ERMI ranking system based on dust samples collected from homes across the U.S. The ERMI will help predict the moldiness of homes. Homes with high ERMI values have a greater chance of having a mold problem then homes with a low ERMI. 36 different fungi make up the ERMI and are designated as Group I (those found in atypical, water-damaged homes) and Group II (those commonly found in all homes):

An ERMI test is a composite dust sample test. Because of this, we cannot determine from these results where the contamination or source(s) of moisture causing any contamination are located. We also cannot give accurate cleanup instructions (remediation protocol) with this sort of sampling.

Non-Viable Mold Air Samples

This type of sampling is the industry standard for determining contamination and aiding in developing a remediation protocol if elevated mold is found.

Through the use of spore trap cassettes and pumps, we collect air for each non-viable mold air sample. 75 liters of air is collected through the cassette and pump and is then analyzed for both dead and live mold spores. The laboratory identifies the genera of the mold(s) present on the slide in the cassette and reports the results in spores/m³ (spores per cubic meter).

These samples are collected to determine the amount(s) and type(s) of fungal components present in the indoor sampling location as compared to those found outdoors. The sample(s) collected to represent the conditions present at the time the samples were taken. The information these results provide may be used to decide if remediation action is necessary.


[wpforms id=”11259″]



Share This Post

Share on facebook
Share on linkedin
Share on twitter
Share on email

More To Explore

dust mite


We test the dust in your home, office, or car to find your allergy triggers identified by your allergist. MARIA dust testing will show the

graphic how many asbestos samples


The number of asbestos bulk samples needed to determine if asbestos fibers are present in building materials depends on how large the area is of