Resources
Understand the question before choosing the test.
Use these homeowner resources to compare environmental evidence, understand report limits, and choose a practical next step.
Explore by need
Start with the decision in front of you.
Compare environmental tests
Compare tests by sample type, question answered, limitations, and current availability. Available tests show current pricing and ordering options.
Explore DIY tests →Understand reports you have
Learn what an Environmental Review includes and how professional review turns multiple records into clear next steps.
Explore Environmental Review →Talk through the situation
Describe what happened in plain language. MEL may identify testing, existing-report review, source investigation, a qualified professional, or no additional testing yet.
Ask MEL →Four evidence domains
Environmental findings are not interchangeable.
Each domain contributes a different part of the picture. Matching the domain to the question helps prevent unnecessary testing and unsupported conclusions.
A defined place and sampling period
What was present in sampled air during the collection period.
What accumulated
What has accumulated in settled dust over time.
The exact item or material sampled
What was found on a specific sampled surface, material, or object.
What is happening in the building
Inspection or investigation can help identify moisture, damage, affected materials, and possible source conditions.