Door 1
Find a lab
Browse certified laboratories by state. Filter by city, PFAS, lead, bacteria, or mail-in.
Open the lab finder ↓What's in my water?
Find a certified lab — not a strip, not a filter shop
Honest answers, then a state-certified laboratory from official lists.
Start with your question, pick a door below, then choose your state in the finder. Confirm bottles, hold times, and pricing with the lab before you sample.
Certified lab finder
Pick a state to load labs. No national dump on first paint.
What do you need? (optional)
Pick a state to see certified labs near you.
Official lists: start with the EPA certified laboratory contacts page. County health departments and Cooperative Extension often test private wells cheap or free — call them before you buy a kit.
Guides
Nine short reads — then use the finder above.
What a state-certified lab can tell you that a dip strip or retail kit cannot.
When a homeowner test is enough, and when real estate, SDWA, or NJ PWTA rules require a certified lab process.
A short checklist: state certification for your analyte, chain of custody, turnaround, mail-in vs drop-off.
Send samples to a state-certified lab for what you need — well, city water, PFAS, lead, or bacteria.
Buying a filter before a lab test is guessing. Find what is in the water first.
When a mail-in kit from a certified lab is enough, and when local drop-off or collection matters.
Private wells and municipal tap water follow different rules, risks, and starting tests.
Follow the laboratory's bottles and instructions — we are not the lab.
PFAS scope is not bundled into every drinking-water package. Confirm certification before you order bottles.
Test before you filter
Buying a filter before a lab test is guessing which cartridge to trust. Get a certified result first, then choose treatment — or none.
Publication
Guides & symptom pages
Original answers to the questions people ask before they pick a lab — strips vs certification, well vs city, PFAS panels, and what cloudy or smelly water might mean.
Browse guides →
Tool
State-certified lab directory
20 states in this snapshot, drawn from official certification lists. Filter by need, then confirm sampling with the lab.
Use the finder ↑