Know your water, protect your health.
Certified water testing lab serving Northern Virginia homes, businesses, and communities.
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Northern VA NELAP-Certified Laboratory
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Fast
Turnaround
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Trusted by Communities Across VA
WHAT WE TEST
Water testing done right, every time.
Private Well Water Testing
Understand the quality of water from private wells, homes, and other non-public sources through VA-certified laboratory testing.
Public Water Compliance Testing
Ensure public water systems meet state and federal quality standards with accurate, certified testing for municipalities, communities, and facilities.
Wastewater Testing
Reliable wastewater and septic-related testing to support compliance, system monitoring, and responsible water management.
Water Testing for Realtors
Help your clients close with confidence. Joiner Micro Labs provides fast, reliable well water testing for real estate transactions, home inspections, and property closings across Northern VA.
Why choose us
Testing you can trust
Consistent and Certified Results
Fast Turnaround
Times
Expert Support
Every Step
Every Test Meets
Standards
Secure and
Confidential
Not sure where to start?
Find the right water test for your needs
Whether you’re testing drinking water, wastewater, rainwater, or compliance samples, our guide can help you understand what to test and when.
Resources
Learn about water quality
Understanding Water Quality Standards Testing and What It Means for You
The Importance of Drinking Water Lead Testing for Home Safety
Key Water Contamination Facts You Should Know in 2026
Areas We Serve
Focused in Northern Virginia, Available Across Virginia
Joiner Micro Labs primarily serves Northern Virginia while supporting water testing needs throughout the state with convenient sample submission options.
Questions
Find answers about our testing process, what we test for, and how to get your results.
Private well water should be tested at least once a year for bacteria and nitrate. Test again sooner after any change in taste, color, or odor, damage to the well or water line, or new health concerns in the household.
Total coliform bacteria is the standard starting point for evaluating drinking water safety. Depending on your property and household, testing may also include lead, nitrate-nitrite, pH, hardness, iron, manganese, sulfates, and other contaminants.
Yes. Joiner Micro Labs helps Northern VA homeowners identify the right tests based on water source, well age, household concerns, and any unusual color, taste, odor, staining, or sediment.
Yes, in most cases. Water testing is commonly required during real estate transactions involving private wells, and many VA contracts require satisfactory bacteriological results before settlement.
Yes. Joiner Micro Labs is a Northern VA NELAP-accredited laboratory following state-approved analytical methods and required quality-control procedures.
NEWSLETTER
Stay informed
Get the latest water testing tips, lab updates, and safety reminders.