Certified Labs & Locators
Official locators for accredited labs. The national ones (EPA, NELAP, A2LA, AIHA) let you search any state, plus selected state programs.
Accredited lab means the sample is analyzed by an accredited or state-certified lab. DIY screen kits are quick at-home checks and are not lab-accredited. Monitors are continuous devices. Official locators point you to accreditation authorities.
Official EPA gateway to each state's certified drinking-water laboratories.
Search A2LA-accredited testing labs by scope and location.
Find AIHA-accredited environmental microbiology (mold) and related labs.
California's Environmental Laboratory Accreditation Program lab list.
Iowa's certified environmental laboratories (state program).
Find certified radon measurement and mitigation professionals near you.
Search NELAP-accredited environmental labs across participating states.