Contractors that care hire us for XRF testing before any renovation. Join the pro teams who do—call 425-608-9553.
A growing number of homeowners contact us after getting a positive DIY swab result. Swab kits can be quick screens, but they’re not a substitute for a certified inspection:
What swabs are (and aren’t): EPA-recognized spot-test kits (e.g., LeadCheck™) are allowed only to document negative results for specific materials under the RRP rule; they are not approved for dust, clearance, or HUD program compliance. US EPA
Manufacturer update: 3M suspended production and later sold LeadCheck™ to Luxfer Magtech; EPA still recognizes LeadCheck™ (Luxfer) for the RRP negative-response criterion on approved substrates. US EPA
Dust swabs are unreliable: A peer-reviewed field study found 64% false-negative results when LeadCheck swabs were used on dust—i.e., many “safe” readings actually had hazardous dust levels. PubMedScienceDaily
For federally assisted housing and most housing-authority work, paint testing must be performed by a certified lead-based paint inspector or risk assessor using XRF or lab paint-chip analysis—swab kits are not accepted. King County Housing Authority materials explicitly describe paint testing as XRF or lab analysis by a certified professional; HUD’s Lead Safe Housing Rule (24 CFR Part 35) and Guidelines use the same definitions.
Washington’s WAC 365-230 sets training, certification, and work standards for lead inspections, risk assessments, abatement, and dust sampling—aligning with EPA/HUD frameworks. Washington State Legislature
Good for a quick screen only: EPA-recognized swab kit on approved substrates (drywall, plaster, wood, ferrous metal) by a trained renovator, to show negative under RRP. US EPA
Required for compliance & accuracy: XRF analyzer testing or lab paint-chip analysis by a certified inspector/risk assessor—especially for HUD/Section 8 work, clearance, or legal determinations. HUD.gov
Dust hazards: Use dust-wipe sampling with accredited lab analysis (not swabs). HUD.gov
About half of homes in King County were built before 1978—the era when lead-based paint was common—so professional testing is prudent before disturbing paint.
DIY swabs can turn brown, pink, or red and seem definitive, but false results happen—especially on dusty, layered, or contaminated surfaces. For decisions that affect safety, cost, and compliance, book a certified XRF inspection.
Questions or a rush project? Call 425-608-9553 and we’ll get you scheduled.
DON'T USE SWABS!! CALL US FOR XRF TESTING 425.608.9553
Need Lead Paint testing? We perform lead inspections, clearance testing, lead hazard screens, and lead paint risk assessments. Call 425.608.9553