Understand damage • Odor observations

Start with the odor pattern—not a guessed diagnosis

Use a few noninvasive observations to prepare for the existing SDM odor Incident Builder. This page cannot identify a chemical, diagnose a source or establish that an area is safe.

Possible gas, dangerous chemical release or immediate danger? Leave the affected area. Avoid switches, flames and other ignition sources if gas may be involved. Call 911 from a safe location well away from the suspected release. Do not sniff closely or search for the leak.

If people feel unwell, seek appropriate medical help; do not use an odor tool to assess symptoms. Unknown does not mean harmless.

What can you describe without disturbing anything?

No free-text personal information is needed. These selections stay only in page memory; this tool does not save or transmit them.

Reported odor or known historyWhere is it noticed?Which material is reported near that area?When is it noticed?What is known about prior work?

Also note timing and conditions as found in your own record. Do not open assemblies, lift flooring or operate equipment just to answer these questions.

For discussion points, use the existing odor Incident Builder or odor FAQs. The emergency guidance above still applies.

Surface cleaning has limits

A persistent odor can involve materials beyond the visible surface. An assessment may consider cleaning, access to affected layers, removal or replacement where appropriate, or specialist treatment. These are possibilities to evaluate—not a diagnosis or a treatment recommendation for your property.

Do not mix cleaning chemicals, disturb suspect materials or use treatment equipment to test a source. A changed or absent odor does not establish air quality, contamination status or clearance. There is no guaranteed treatment outcome from this questionnaire.

Sources and boundaries

Reviewed October 31, 2026. EPA indoor-air guidance explains source control and the limits of filtration. EPA mold guidance cautions about disturbing suspected hidden growth. PHMSA supports the suspected-gas escalation. The category discussion points are educational SDM interpretation, not confirmation of a source or hazard.