How long do well water test results take?
Short answer: It depends on the lab. Penn State's lab says tests are generally complete within 10 to 14 business days after it receives the sample. Virginia's VAHWQP clinics return results about 4 to 5 weeks after sample collection, and Loudoun County says about six weeks after drop-off. Bacteria samples must reach Penn State within 30 hours.
| Program or lab | Turnaround it publishes |
|---|---|
| Penn State AASL (mail-in, PA) | Generally 10–14 business days after the lab receives the sample [source] |
| VAHWQP drinking water clinics (VA) | About 4–5 weeks after sample collection [source] |
| VCE Loudoun program (VA) | About six weeks after sample drop-off, by email [source] |
Shipping deadlines matter for bacteria
Penn State must receive bacteria samples within 30 hours of sampling, and it can't accept bacteria samples on a Friday. [source] Clinic programs avoid shipping by having everyone collect and drop off on a set day. [source]
Need results fast?
For a home sale or a suspected problem, call a state-certified lab and ask its turnaround before you sample. The CDC says your county or health department should have a list of state-certified labs. [source]
FAQ
How long do well water test results take?
It depends on the lab. Penn State's lab says tests are generally complete within 10 to 14 business days after it receives the sample. Virginia's VAHWQP clinics return results about 4 to 5 weeks after sample collection, and Loudoun County says about six weeks after drop-off. Bacteria samples must reach Penn State within 30 hours.
Sources
- Penn State AASL – Drinking Water Testing (fees) (accessed 2026-10-23)
- Virginia Household Water Quality Program (Virginia Tech/VCE) (accessed 2026-10-23)
- Loudoun County – Household Water Quality Testing Program (accessed 2026-10-23)
- CDC – Guidelines for Testing Well Water (accessed 2026-10-23)
Informational only, not health, medical, legal or real-estate advice. Programs and fees change; confirm with the official source. See our disclaimer and affiliate disclosure.