Dust History:
Understand Mold Growth
Dust Tells Us What’s Happening Over Time in Your Home
Dust provides a broader view of indoor conditions over time because it accumulates over weeks to months and acts as a settling surface for mold fragments and spores. It helps reveal mold reservoirs that may not be actively aerosolizing during an air test, including mold growth inside walls, beneath flooring, within contents, or in areas with intermittent moisture. Our Dust History test collects these dust reservoirs, and our laboratory analyzes them for more in-depth results.
Understand what’s been happening over time, not just what’s currently airborne.
Find hidden mold reservoirs and difficult to find molds.
Get total home clarity with both air testing and dust history.
Kit
5 Mold Plate Samples
Sample common living areas, bedrooms, vehicles, upholstery, carpet.
1 Mold Swab Sample
Sample visible mold, HVAC dust or discoloration, high condensation areas with discoloration or staining.
3 Bacteria Screening for:
- very sick or hospitalized
- immunocompromised
- outside/sewage water event
- check for bacterial growth in 3 key areas.
1 Dust History for:
- mold history of indoor environment
- comprehensive mold testing
- tests up to 500 square feet
Lab Analysis & Report
FREE overnight return shipping to our lab for analysis and a health report. (USA only)
Expert Consultation
Advice & Guidance from JW Biava, CMI, CMRC — ISEAI Board Member.
$344
$414 Special Offer
5 rooms + bacteria screening + mold history
+ 
Lab report & consultation.
A LA CARTE
Dust History Testing
Dust History Testing
Understand the mold and microbial history of your indoor environment.
- mold history of indoor environment
- comprehensive mold testing
- tests up to 500 square feet
Lab Analysis & Report
Laboratory analysis, report, and consultation are included. Return-to-lab postage is optional and costs extra.
Expert Consultation
Advice & Guidance from JW Biava, CMI, CMRC — ISEAI Board Member.
$90
Lab report & consultation.
New Kit
Quickstart Kit Total Home
Lab report & consultation.
$344
$414 Save 17%
5 rooms + bacteria screening
+ mold history
More Details
5 Mold Plate Samples
Sample common living areas, bedrooms, vehicles, upholstery, carpet.
1 Mold Swab Sample
Sample visible mold, HVAC dust or discoloration, high condensation areas with discoloration or staining.
3 Bacteria Screening for:
- very sick or hospitalized
- immunocompromised
- outside/sewage water event
- check for bacterial growth in 3 key areas.
1 Dust History for:
- mold history of indoor environment
- comprehensive mold testing
- tests up to 500 square feet
Lab Analysis & Report
FREE overnight return shipping to our lab for analysis and a health report. (USA only)
Expert Consultation
Advice & Guidance from JW Biava, CMI, CMRC — ISEAI Board Member.
A La Carte
Dust History Testing
Lab report & consultation.
$90 each
Understand the mold and microbial history of your indoor environment.
Air Testing + Dust History = Total Home Clarity
Air testing alone cannot reliably identify all mold reservoirs, but Dust History testing fills that gap by providing historical context— together they offer a more complete and defensible understanding of your indoor conditions. Each sampling method answers a different question.
Air answers, “What am I breathing right now?”
Dust answers, “What has been happening here over time?”
In-Depth Lab Report Included with Dust History Testing
The Dust History test comes with a Lab Report on the types of mold found in each of your samples. See a sample of our report below.
Dust History Completes the Mold Check-Up™
Dust History testing is one component of the ImmunoLytics Mold Check-Up™ approach that includes plate testing, swab testing, bacteria screening, laboratory analysis, and professional consultation. Dust is another important piece of the puzzle in finding hidden mold, and when combined with our other methods, brings clarity to complex indoor environments.
Frequently Asked Questions
Resources: order a Dust History mold test · compare all mold testing methods · how to collect a Swiffer sample
Why are Swiffers® used?
The Swiffer method is intentional.
- It is a familiar household item.
- It allows standardized dust collection across environments.
- It is non-invasive and does not disturb building materials.
- It captures fine particulate matter relevant to indoor exposure history.
Used correctly, it provides a consistent and repeatable sampling surface.
What factors might influence dust results?
Dust results should always be interpreted in context. Variables that affect results include:
- Cleaning frequency and methods
- Recent renovations or disturbances
- HVAC operation and filtration
- Occupancy patterns
These factors do not invalidate results, but they provide important context during interpretation.
When is Dust History Testing especially useful?
- Pre-purchase or pre-rental screening
- Post-remediation verification
- Identifying hidden mold reservoirs
- Routine indoor environmental assessment
- Situations where air tests appear normal but concerns persist
Because dust integrates conditions over time, it reduces short-term variability caused by daily activities like cleaning or occupancy.
How often should I do Dust History testing?
Repeat testing may be appropriate:
- After remediation
- Following significant water events
- After major building changes
- As part of periodic reassessment in sensitive environments
Frequency is best determined during consultation.
Can I get Dust History with my Mold Check-Up™?
Yes! Dust History is a component of the ImmunoLytics Mold Check-Up™ and is available now through Quickstart Kits and/or custom kits. As with anything in the Mold Check-Up™ it includes lab analysis, detailed reporting, and a consultation with a mold expert.
Is this test suitable for DIY homeowners?
Yes. The collection process is straightforward and consumer accessible, and it includes professional interpretation with an expert consultation.
Does this test measure live mold only?
No. It is a non-culturable microscopy-based assessment that includes dead and non-viable mold.
Can dust show mold that air tests miss?
Yes. Dust often contains molds that are not airborne at the time of testing or that do not grow well in culture.
Does Dust History replace air (plate) testing?
No. The ImmunoLytics Mold-Check-Up™ is an investigative approach, not a single test or score. Dust History is an important piece of the puzzle in finding hidden mold reservoirs, and when combined with other methods (plates, swabs, bacteria screening), it helps bring clarity to complex indoor environments.
About ImmunoLytics
ImmunoLytics has been a trusted leader in indoor environmental testing since 2006. Founded by JW Biava, CMI, CMRC — a Certified Mold Inspector, Certified Mold Remediation Contractor, and ISEAI Board Member — our accredited mycology lab has identified over 37,000 mold species. We deliver professional-grade mold, bacteria, and dust history testing kits directly to homeowners and environmental professionals, with every test backed by a detailed lab report and expert consultation. Learn more about mold exposure at CDC.gov.
Since 2006 · 350,000+ Mold Samples Analyzed · 100,000+ IAQ Inspections · JW Biava, CMI, CMRC — ISEAI Board Member · 4.9★ Google Rating (47 reviews)
IMPORTANT HEALTH NOTICE: Dust History Testing is an environmental assessment tool and is not a medical diagnostic device. The presence or absence of mold in dust samples does not constitute a medical diagnosis or treatment recommendation. If you are experiencing health symptoms that may be related to indoor mold or environmental conditions, please consult a qualified healthcare provider. All test results should be interpreted by a trained Indoor Environmental Professional (IEP). ImmunoLytics recommends consulting a licensed physician for any health concerns related to mold exposure.