Microbac Laboratories — Harrisburg
4359 Linglestown Road
Harrisburg, PA 17112
- Total coliform bacteria
PA DEP certified environmental lab. Ask whether they accept private well owner samples before you collect.
Well water testing in Dauphin County, Pennsylvania
Labs copied from the official Pennsylvania certified lab list (last verified 2026-10-27). All Pennsylvania labs
The official Pennsylvania list shows 1 certified lab in Dauphin 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 Dauphin County
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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 Dauphin 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 Dauphin 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 Dauphin County, PA?
The official Pennsylvania certified lab list shows 1 lab in Dauphin 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.