Water Quality in Louisiana: Complete Guide
Everything homeowners need to know about Louisiana tap water - hardness, contaminants, treatment options, and costs.
Quick summary: Louisiana has an average water hardness of 81 PPM across 15 cities. 7% 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 Louisiana
Louisiana's water hardness ranges from 40 PPM in Monroe to 180 PPM in Thibodaux, with a statewide average of 81 PPM. This places Louisiana near the national average for water hardness. The national average is approximately 120 PPM.
Most Louisiana cities use surface water (rivers, lakes, reservoirs), which generally has lower mineral content than groundwater.
Contaminants of Concern in Louisiana
PFAS: The average PFAS level across Louisiana cities is 14.5 ppt. New Orleans has the highest detected PFAS at 32.44 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. Louisiana 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 Louisiana?
For most Louisiana residents, no. Only 7% of cities have hard water above 120 PPM. However, individual situations vary - check your city page for specific data.
Impact of Hard Water in Louisiana
With an average hardness of 81 PPM, most Louisiana households do not face significant hard water impact. However, homes with hardness above 120 PPM should evaluate treatment options.