Water Quality in Tennessee: Complete Guide
Everything homeowners need to know about Tennessee tap water - hardness, contaminants, treatment options, and costs.
Quick summary: Tennessee has an average water hardness of 96 PPM across 20 cities. 40% of cities have hard water above 120 PPM. PFAS contamination is detected above EPA limits in at least one city. Most households do not need water softening equipment.
Water Hardness Across Tennessee
Tennessee's water hardness ranges from 15 PPM in Johnson City to 180 PPM in Collierville, with a statewide average of 96 PPM. This places Tennessee near the national average for water hardness. The national average is approximately 120 PPM.
Most Tennessee cities use surface water (rivers, lakes, reservoirs), which generally has lower mineral content than groundwater.
Contaminants of Concern in Tennessee
PFAS: The average PFAS level across Tennessee cities is 7.5 ppt. Smyrna has the highest detected PFAS at 52.32 ppt, above the EPA maximum contaminant level of 4 ppt. Residents should consider a reverse osmosis or NSF P473-certified filter for drinking water.
Lead: Lead contamination comes from plumbing infrastructure, not the water source. Tennessee homes built before 1986 are at higher risk due to lead solder. All cities in our database show lead levels below 5 ppb.
Do You Need a Water Softener in Tennessee?
It depends on your city. About 40% of Tennessee cities have hard water above 120 PPM. Check your specific city on CheckMyTap to see if treatment is recommended.
Impact of Hard Water in Tennessee
With an average hardness of 96 PPM, most Tennessee households do not face significant hard water impact. However, homes with hardness above 120 PPM should evaluate treatment options.