Mold Testing in Alexandria, VA

There is no federal or Virginia indoor mold limit, so a test is a comparison: your rooms against outdoor air from the same appointment. When growth is visible, the EPA does not consider sampling necessary, since that mold has to come out either way.

Rowhouses

In an attached Old Town or Parker-Gray house, sampling the low basement, the main floor, and the yard shows whether the problem stays below grade. A sample near a shared wall, read with moisture readings, helps show whether it starts next door.

Near the river and creeks

For homes that took water near the waterfront, Cameron Run, or Four Mile Run, cavity samples at the base of repaired walls and air samples from the lower floor show whether the earlier cleanup worked.

Buying a historic home

About 60% of Alexandria homes predate 1980 (Census ACS). A general home inspection does not sample; if it flags damp masonry or an odor, lab results during your inspection period give you facts before closing. See mold and home inspections.

After remediation

Virginia remediators must follow EPA or ANSI/IICRC S520 practice under the Consumer Protection Act, but the state sets no clearance number. Write the pass criteria into the contract and have someone outside the crew run the final test. See mold remediation in Alexandria.

Price

DC-area testing firms list about $395 to $425 for one area, including an indoor sample, an outdoor comparison, and the lab, in 2026 published prices. If the moisture source is unknown, a mold inspection in Alexandria comes first.

Booking

Say whether it is a rowhouse, a newer home, or a flood repair you want checked; the company on the line suggests samples and a price. Calling is free.

Virginia does not license mold testers. Ask who takes the samples, which accredited lab analyzes them, and whether the tester has any tie to the remediation company.