Home Mold Inspection & Testing Air Quality Testing
Independent Mold Testing
Based in Falls Church · Serving Northern Virginia

Air Quality Testing in Falls Church, VA

We measure the humidity first, because a damp room tells us where the air samples should go.

5.0/5 Stars on
Google Reviews
Lab Accredited third-party
lab analysis
Free Phone consultation
to start
5.0/5 on Google Verified homeowner reviews
A woman sitting calmly on a navy sofa in a bright living room, breathing easy, for air quality testing in Falls Church, VA

"The owner was very informative and provided great service. Will use them for any other mold issues that come up in the future."

Josh Simpson · Google review

Our air quality testing in Falls Church measures indoor humidity before it samples the air for mold spores. Typical July dew points at Dulles sit in the mid-60s °F (NOAA hourly normals), and air that humid makes the Virginia Department of Health's suggested indoor range of 30 to 60 percent hard to hold without air conditioning or a dehumidifier.

Testing suits a problem you can smell or feel but can't point to: a musty room with nothing visible, a leak that was dried out with doubts about whether it dried in time, or a room that stays damp with the dehumidifier running. It is one of the services under mold inspection and testing.

It is one part of the mold inspection & testing work we do across Falls Church, VA.

Verified Reviews

What homeowners tell us.

5.0/5 stars on Google. Every review here is quoted word for word from Google. Read them all on our reviews page.

Humidity first.

We take relative humidity readings room by room, including the basement and any crawl space, and moisture readings in walls, floors and framing wherever something looks or smells wrong. A room reading above 60 percent is where the air samples go first.

A hygrometer from a hardware store shows where a room sits from day to day. Leave one in the room that worries you for a week before we come, and tell us the highest reading you saw.

Readings by season.

By our calculation from NOAA's hourly normals at Dulles, dew points average in the low 60s °F in June, the mid-60s in July and August, and the low 20s in January. A house that reads dry in January can read very differently in August, so we note the date and the weather beside each reading.

If the smell comes with humid weather, test in summer, because testing in January can miss an August problem.

Spore traps.

Each air sample comes from a spore trap that pulls a measured volume of air through a cassette. Spores drift in from outside all the time, so we take an outdoor sample on the same visit, as close in time to the indoor ones as we can.

For the most useful indoor sample, keep the windows closed, run the HVAC as you normally would and skip vacuuming and dusting the day before.

Indoor against outdoor.

The numbers mean most side by side. Indoor counts close to the outdoor sample, with a similar mix of genera, describe a house breathing ordinary outdoor air. Indoor counts well above the outdoor sample, or a genus indoors that barely shows outside, point to something growing inside, and the humidity readings usually show which room to look in.

A single high room in an otherwise ordinary house narrows the search to that room and the ones around it, which is where we take a closer look at walls, floors and any ductwork.

Outside the scope.

Our testing looks for mold spores and the moisture behind them. Radon, carbon monoxide and chemical pollutants such as VOCs need a different specialist, and if that is what your question really is, we'll say so on the first call.

What the lab report tells you.

Samples go to an accredited third-party lab with no affiliation to EnviroPure. Air and tape results usually come back in 2 to 3 business days.

The report gives the spore count per cubic meter and the genus of what was found, compared against outdoor and baseline samples. It is written in plain language with clear next steps, and it is yours to keep.

Why EnviroPure

Why people choose EnviroPure.

The first call is free

The consultation costs nothing, and on it we'll tell you whether testing is likely to answer your question.

Indoor and outdoor, one lab

The same accredited lab reads the indoor and outdoor samples, so the comparison is like for like.

Part of our mold inspection & testing service.

The mold inspection & testing page walks through the whole process, start to finish.

Frequently Asked

Before you call.

That is one of the most useful times to test. Moisture readings show whether materials are still wet, and air samples show whether indoor spore levels sit above the outdoor sample.

It can lower the indoor count for a while without touching the source. Tell us if one has been running, and where, so we can note it beside the sample from that room.

The consultation is free, and so is a visual mold inspection. On that call we'll go over what testing your house needs and the earliest visit we can offer.

Schedule Your Free Consultation

Start with a free visual inspection.

If we confirm visible mold, you get an estimate. If the concern is the air rather than a visible patch, we'll talk through testing.

Or call us directly 703-951-2400
Where We Work

Serving Falls Church & Northern Virginia.

Falls Church is home base. The same process and lab testing reach McLean, Fairfax, Tysons and Annandale, Alexandria and Arlington, and Chevy Chase, Potomac and Bethesda across the river in Maryland. Ask us about your street.

Fairfax County

Falls Church · McLean · Vienna · Tysons · Great Falls · Oakton · Annandale · Springfield · Fairfax

Taking bookings
Alexandria & Arlington

Alexandria · Old Town Alexandria · Kingstowne · Arlington · Crystal City · Ballston

Taking bookings
Montgomery County, MD

Bethesda · Potomac · Chevy Chase

Taking bookings
Service coverage
Northern Virginia · Montgomery County, MD