Drug residue testing

Drug residue, read through a scientist.

Surface contamination from prior occupants. Most common: methamphetamine residue from former manufacture or heavy use. Buyer due-diligence, post-eviction cleaning verification, and tenant safety.

Shop drug residue tests → How it works

What we look for

The full panel.

  • Methamphetamine surface swab

    EPA Method 8270 swab of common-contact surfaces (walls, HVAC returns, kitchen counters).

  • Fentanyl surface swab (optional)

    Add-on screen for fentanyl contamination. State availability varies.

How it works

From kit to report.

  1. 01 · Decide the surfaces

    For pre-purchase, a 4–6 swab composite gives a defensible baseline. For a single suspect room, target HVAC returns and high-handling surfaces.

  2. 02 · Collect and ship

    Swabs ship in glass vials with chain-of-custody paperwork. Same-day mail-in. State rules vary — some require licensed assessors above a contamination threshold or for real-estate transactions, so check with your inspector or attorney before relying on a result for a sale or eviction record.

  3. 03 · Reviewed and reported

    Lab returns ng/100cm² figures. The report reads them against the state threshold (when one exists) and against EPA guidance, with next-step language for decontamination contractors.

Drug residue is one of the cleanest tests we run: the swab either picks up the marker or it doesn't. The judgment call is what to do with a positive — and that depends as much on which state you're in as on the number itself.

Mark Arvin, Chief Science Officer

Who this is for

Best fit when…

  • Homebuyers in due-diligence windows
  • Landlords post-eviction or post-incident
  • Tenants entering a unit with documented prior issues

Other services

Mold Water Allergens
The last step

Ready to test for drug residue?

Pick the kit that fits your situation and we'll ship it. Results come back with context, not just a number.

Shop drug residue tests → Email us