Aqua Pennsylvania Inc - Shenango Valley Division
644 North Water Avenue
Sharon, PA 16146-1515
- Coliform bacteria
- Chemistry
Call to confirm the lab accepts private well samples, and ask about price and turnaround.
Well water testing in Mercer County, Pennsylvania
Labs copied from the official Pennsylvania certified lab list (last verified 2026-10-29). All Pennsylvania labs
The official Pennsylvania list shows 3 certified labs in Mercer County. Call before you sample to confirm the lab accepts private well water and to ask about bottles, prices and drop-off times.
Certified labs in Mercer County
Environmental Service Laboratories, Inc - Northwest Division
950 W Main Street
Sharpsville, PA 16150-0135
- Coliform bacteria
- Chemistry
Call to confirm the lab accepts private well samples, and ask about price and turnaround.
The Municipal Authority of the Borough of Greenville
45 South Water Street
Greenville, PA 16125
- Coliform bacteria
- Chemistry
Call to confirm the lab accepts private well samples, and ask about price and turnaround.
Get a free quote from a local well treatment pro in Pennsylvania
Tell us what's going on with your well water. With your consent, up to 2 local treatment providers may contact you. We do not sell your info to mailing lists.
What to test for
- Test every year for total coliform bacteria, nitrates, total dissolved solids, and pH. Use a state-certified drinking water laboratory. Source
- Penn State Extension: about half of PA private wells that have been tested show at least one water-quality problem, yet only about half of wells have ever been tested. Source
- 2025 Penn State citizen-science study: PFAS detected in 65% of 167 private wells sampled statewide; 18% exceeded EPA health-related limits, with higher detections in southeastern PA. Source
After a flood in Mercer County
EPA says to test a private well for bacteria after flooding before drinking the water again. Check current flood alerts and Flood Watch, and read flood season testing. EPA: your well after a flood
Local help
Your Mercer County or local health department can tell you about local well testing, including any free or low-cost programs. State contact: PA DEP — private well water testing guidance.
Questions
Where can I test well water in Mercer County, PA?
The official Pennsylvania certified lab list shows 3 labs in Mercer County; they are listed on this page with phone numbers. Call first to confirm they accept private well samples.
How often should I test my well?
EPA recommends testing every year for total coliform bacteria, nitrates, total dissolved solids and pH, and testing right away after flooding, well repairs, or a change in taste, color or smell.
Other Pennsylvania counties
Adams County · Allegheny County · Armstrong County · Beaver County · Berks County · Blair County · Bradford County · Bucks County · Butler County · Cambria County · Centre County · Chester County · Clarion County · Cumberland County · Dauphin County · Elk County · Erie County · Fayette County · Franklin County · Greene County · Indiana County · Jefferson County · Lackawanna County · Lancaster County · Lawrence County · Lebanon County · Lehigh County · Luzerne County · Lycoming County · McKean County · Mifflin County · Montgomery County · Northampton County · Northumberland County · Philadelphia County · Schuylkill County · Somerset County · Washington County · Westmoreland County · York County