ERMI TestingServing Virginia and Maryland for Over 35 Years!
Has your doctor asked for an ERMI? We collect ERMI and HERTSMI-2 dust samples in homes across Virginia and Maryland, send them to the laboratory and walk you through the report.
- ERMI
- HERTSMI-2
- Actinomycetes
- Endotoxin
- Laboratory Report Included
- Follow-Up Phone Call Included
What We Test and What It Costs
Dust tests show what a home has accumulated over time, which is why doctors request them for sick homes. Pricing reflects normal business hours.
Dust tests (DNA and bacterial analysis)
Sick Home and Doctor-Requested Testing
ERMI
The Environmental Relative Moldiness Index is a DNA-based dust analysis that scores a home's overall mold burden across 36 species, including those associated with water damage. The test most often requested by doctors for a sick home.
Includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Additional samples $295 each.
Results in approximately 10 daysHERTSMI-2
A focused dust analysis of the five species most strongly associated with water-damaged buildings. Commonly used after remediation to assess whether a home is ready for occupancy.
Includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Additional samples $295 each.
Results in approximately 10 daysActinomycetes
A DNA-based dust analysis for actinobacteria, which colonize chronically wet building materials and are evaluated alongside mold in sick homes. Frequently ordered with ERMI or HERTSMI-2.
Includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Additional samples $295 each.
Results in approximately 10 daysEndotoxin
Measures a bacterial by-product that accumulates in water-damaged homes and is not detected by mold testing. Used when a home continues to test poorly after remediation.
Includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Additional samples $295 each.
Results in approximately 10 daysExpedited Results
Our laboratories do offer rush processing on ERMI, HERTSMI-2, Actinomycetes and Endotoxin testing for an additional fee.
Doctor asked for specific tests? Tell us which ones, and we'll take it from there.
Let's Get Started!
Call us! We love to talk about mold!
Open 7 Days a Week:
Mon–Fri 8 AM–5 PM
Sat & Sun 9 AM–1 PM
ERMI Testing: The Process
Call or Schedule Online
Tell us which tests your doctor asked for and what you've noticed in the home.
Dust Sample
A dust sample is collected in your home and sent overnight to the laboratory.
Laboratory Analysis
The laboratory analyzes the dust. Results take approximately 10 days.
Report and Follow-Up Call
You receive the laboratory report, plus a follow-up phone call to walk you through the results and answer any questions you may have.
Experience. No One Has More.
Experience you can't get from a training course, and we still listen and learn on every job!
Water Damage and Mold Jobs
Water damage is the most common cause of mold, and we've worked on both sides of it for over 35 years. More than 15,000 jobs, and we still listen and learn on every one!
Happy Customers
As a former multi-state licensed general contractor, we completed more than 100,000 home service and repair jobs across every trade. That's where home systems fail, and knowing how they fail makes it much easier to find where mold is hiding and its likely sources.
Of Doctor-Referred Clients with Sick Homes
Doctors refer their patients to us. Many of those homes look spotless, yet test results point to an elevated-risk environment. If you or your doctor thinks your home is making you sick, we're the company for you.
Client Reviews
★★★★★
“Tom provided a prompt and thorough response on how to address an issue. He was honest and helpful in approaching the issue step by step, not launching into any unnecessary or upselling treatments, and explained in detail the rationale and science-based strategies around mold and moisture. He is really knowledgeable and competent. I can't thank Tom enough and would highly recommend this company.”
★★★★★
“Tom Mitchell is excellent to work with. A true expert on water damage and mold removal. Tom does a nice job analyzing the severity of the mold issue and then developing a plan to address the situation and remove mold from the home. Tom is very responsive and is dedicated to providing solutions to challenging mold/water damage problems.”
★★★★★
“I had a consult with Tom and felt very reassured by his knowledge and experience. He took great care in making sure all my questions were answered and concerns were addressed! I really appreciated his insight and would definitely recommend.”
ERMI Testing Questions, Answered
What Is an ERMI Test?
ERMI stands for Environmental Relative Moldiness Index. It is a DNA-based analysis of a home's dust that scores the overall mold burden across 36 species, including those associated with water damage.
What Does ERMI Testing Cost?
ERMI testing is $595, which includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Each additional sample is $295.
How Long Do ERMI Results Take?
Plan on approximately 10 days. Our laboratories do offer rush processing for an additional fee.
ERMI or HERTSMI-2: Which One Do I Need?
It usually depends on what your doctor has asked for. HERTSMI-2 is a focused analysis of the five species most strongly associated with water-damaged buildings. HERTSMI-2 is $495, which includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Each additional sample is $295.
Do I Need an ERMI If I Can Already See Mold?
Often, no. If you can see mold, the next step is usually a plan to remove it. An ERMI earns its keep when your doctor has asked for specific data or when you want a picture of what the home has accumulated over time.
Additional Questions
Does My Doctor Have to Order the Test?
No. Many clients call us because their doctor asked for an ERMI, but you can schedule one yourself.
Can You Test After Remediation?
Yes. HERTSMI-2 is commonly used after remediation, and we collect those samples regularly.
Do You Test Outside Virginia and Maryland?
We test homes across large parts of Virginia and Maryland. Check your ZIP code to find out.
Do You Offer Other Dust Tests?
Yes. Actinomycetes and Endotoxin testing are $595 each, which includes the first sample, overnight delivery to the laboratory, the report and the follow-up call. Each additional sample is $295.
Questions About ERMI Testing? Call Us
Open 7 Days a Week:
Mon–Fri 8 AM–5 PM
Sat & Sun 9 AM–1 PM
Serving Virginia & Maryland · Consulting across the Continental U.S.