Water testing is a scientific analysis of your home’s water supply to identify any contaminants, imbalances, or health risks present in the water you cook with, bathe in, and drink every day. A certified lab processes collected water samples and returns a detailed report of exactly what is — and isn’t — in your water.

A standard water quality test examines a range of potential contaminants and conditions, including:

• Bacteria & Coliform (including E. coli) — the most common health threat in private wells
• Nitrates & Nitrites — especially dangerous for infants and pregnant women
• pH levels — Imbalanced pH levels can eat away at your pipes and leave your water tasting off
• Hardness (calcium & magnesium, water hardness) — causes scale buildup in plumbing and appliances and affects cleaning efficiency
• Iron & Manganese — cause staining, odors, and affect taste
• Lead & Heavy Metals (including mercury) — often leach from older pipes into the water supply and can be toxic even at low levels
• Chlorine & Chloramines — disinfection byproducts that may pose long-term risks
• Volatile Organic Compounds (VOCs) — from industrial or agricultural contamination
• Arsenic — a naturally occurring element found in some East Tennessee groundwater

Laboratory water testing can determine the presence of microorganisms, such as bacteria, viruses, and other contaminants—including heavy metals like mercury—that may not be detected by home test kits. Physical factors such as unusual color, taste, or odor are also assessed, as the presence of these can indicate contamination and potential health risks. DIY home test kits are available for quick checks of basic water quality indicators, but they are less comprehensive than laboratory analysis and may not detect all contaminants.

There’s an important difference between municipal (city) water and private well water. City water is treated and regularly tested by the utility provider — but that testing happens at the source, not at your tap. Older pipes in the distribution system or inside the home itself can introduce new contaminants between the treatment plant and your faucet. Private well water receives no municipal treatment whatsoever, making independent testing essential.

Municipal Water in Chattanooga

Chattanooga’s public water supply is managed by the Tennessee American Water Company and draws primarily from the Tennessee River. Municipal water testing is conducted by the utility provider, and the Tennessee American Water Company publishes an annual Water Quality Report that tracks compliance with federal and state standards. Public water users in Tennessee can review the annual Tennessee American Water Quality Report to learn more about local water quality. While the utility meets EPA standards, homebuyers in older neighborhoods — particularly those with pre-1986 plumbing — can still face elevated lead levels from aging pipes and fixtures inside the home. Treatment plant standards do not guarantee what comes out of your specific tap.

Private Wells in Hamilton County and Surrounding Areas

Many properties in the suburbs and rural areas around Chattanooga — including parts of Hamilton, Sequatchie, Marion, Meigs, Rhea, and Bradley Counties — rely on private wells. East Tennessee’s geology, including limestone karst formations and historic industrial and agricultural activity, creates real potential for groundwater contamination. Common concerns in the region include bacterial contamination, naturally occurring arsenic, elevated iron and manganese, and nitrate runoff from agricultural land.