Clean, safe water is essential for your health, home, and business. Professional water testing helps identify contaminants, water quality concerns, and potential safety issues before they cause damage or health risks.
At National Water Service, we provide local water testing in Maryland, Washington DC, and Northern Virginia, working with trusted regional laboratories to deliver accurate, reliable results. Whether your water comes from a private well or municipal supply, our testing process is designed to reflect real local water conditions — not generic assumptions.
With over 47 years of experience serving the Mid-Atlantic region, we help homeowners, property managers, and businesses understand exactly what’s in their water and what steps—if any—are needed next.
Professional water testing is the process of collecting and analyzing water samples to identify contaminants that may affect safety, taste, odor, plumbing performance, and long-term health.
Unlike at-home test kits, professional testing evaluates both visible and hidden water issues that may impact your drinking water, appliances, and pipes. Our water testing services are performed using certified laboratory analysis to ensure accurate, actionable results.
We test water for contaminants commonly found in Maryland, DC, and Northern Virginia, including issues related to aging infrastructure, groundwater conditions, and well systems.
National Water Service provides local water testing supported by trusted regional laboratories serving Maryland, Washington DC, and Northern Virginia. Our lab partners follow industry-recognized testing standards to ensure precise and dependable results.
Local testing matters. Water quality can vary significantly by county, neighborhood, and even street. By working with regional labs and technicians familiar with local water conditions, we ensure your test results reflect the actual characteristics of your water supply.
This localized approach allows us to deliver faster turnaround times, more accurate findings, and clearer guidance based on real regional data — not national averages.
Each water testing service is tailored to the specific concerns of your home or business and the characteristics of your local water supply.
Not sure what’s in your water?
Get professional water testing with local lab analysis.
* Optional tests available upon request, may require additional charge
On city water? Check out the EWG site to see what it’s your tap water based on your zip code!
We provide professional water testing services for both residential and commercial properties, including homes, apartments, offices, medical facilities, restaurants, and industrial spaces.
Whether you rely on a private well or municipal water, regular testing helps identify potential issues before they become costly or hazardous. Commercial water testing is especially important for compliance, equipment protection, and customer safety.
Our experienced technicians help interpret results and explain what they mean for your property — clearly, honestly, and without pressure.
After testing is complete, our team reviews your results with you in clear, easy-to-understand terms. If your water meets safety standards, you’ll have peace of mind knowing your supply is safe.
If contaminants are detected, we explain the findings and recommend appropriate water treatment solutions based on your results — never unnecessary upgrades.
We offer the following water treatment solutions when your water test comes back with results that need tackled:
We proudly provide professional water testing services throughout:
Maryland: Montgomery County, Frederick County, Howard County, Anne Arundel County, Baltimore County, and surrounding areas
Washington DC: All neighborhoods from Capitol Hill to Georgetown
Northern Virginia: Fairfax County, Loudoun County, Arlington, Alexandria, and nearby communities
Professional water testing is recommended at least once per year for most homes and businesses. Additional testing is advised when purchasing a home, after plumbing changes, flooding, or if you notice changes in taste, odor, or appearance.
Yes. Professional water testing services provide lab-verified results that are more accurate and reliable than most at-home kits. Laboratory analysis identifies a wider range of contaminants and ensures results meet industry standards.
Yes. National Water Service provides local water testing throughout Maryland, Washington DC, and Northern Virginia. Our testing is supported by trusted regional laboratories to ensure accurate results specific to local water conditions.
Our water testing services can identify bacteria, iron, sulfur, water hardness, pH levels, nitrates, chlorine, heavy metals such as lead, and other common drinking water contaminants.
If an issue is identified, we explain the results clearly and recommend appropriate treatment options based on your specific test results. Our goal is to help you improve water quality — never to sell unnecessary services.
