Tennessee Tap Water Quality Report

The tap water quality in Tennessee currently sits near the national average, registering a composite safety score of 68.6/100 across 787 monitored ZIP codes. While a significant portion of the state maintains adequate water quality and full compliance with federal standards, 0% of ZIP codes in Tennessee have received a failing grade due to recent compliance issues. Monitoring data from the EPA indicates that while the majority of residents receive safe tap water, localized issues remain a challenge for several municipal systems.

Over the past 5 years, water utilities in Tennessee have recorded a total of 1,334 violations, of which 217 were strictly health-based. While administrative and reporting violations are common nationwide, health-based violations mean that certain contaminants exceeded the EPA's Maximum Contaminant Levels (MCLs) at some point. Tennessee Department of Environment and Conservation, which acts as the primary regulatory authority in the state, typically works closely with these utilities to issue boil water advisories or mandate infrastructure upgrades when these limits are breached.

Fortunately, the risk of widespread lead exposure in Tennessee's municipal water is relatively low compared to other states, with only 19.8% of ZIP codes falling into the High or Very High risk categories. However, because lead primarily enters drinking water through the corrosion of individual home plumbing rather than the main municipal supply, residents living in homes built prior to 1986 should still exercise caution. Using a standard carbon block filter and running the tap for 30 seconds each morning remains a recommended best practice for all households.