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Tap water quality report

Nashville, TN

EPA monitoring detected 8 contaminants across the 2 water suppliers serving Nashville. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
843,671
people served
8
contaminants found
Tennessee rankings Lead in Tennessee PFAS in Tennessee

What was found in Nashville's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
738.2 µg/L 18%
of the EPA limit 4000 µg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2019
2/2 SYR4
Nitrate
520.2 µg/L 5.2%
of the EPA limit 10000 µg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2019
2/2 SYR4
TTHM
59.96 µg/L 75%
of the EPA limit 80 µg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2019
Highest in the city: 62.8 µg/L — HARPETH VALLEY U.D. · 65,518 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
56.965 µg/L 95%
of the EPA limit 60 µg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2019
2/2 SYR4
Barium
19.9 µg/L 1%
of the EPA limit 2000 µg/L
Highest in the city: HARPETH VALLEY U.D. · 65,518 people · 2018
1/2 SYR4
Chlorobenzene
1.622 µg/L 1.6%
of the EPA limit 100 µg/L
Highest in the city: HARPETH VALLEY U.D. · 65,518 people · 2018
1/2 SYR4
2,4-D
0.1933 µg/L 0.3%
of the EPA limit 70 µg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2019
1/2 SYR4
Lead
0.00080 mg/L 5.3%
of the EPA limit 0.0150 mg/L
Main supplier: METRO WATER SERVICES · 778,153 people · 2025
Highest in the city: 0.0047 mg/L — HARPETH VALLEY U.D. · 65,518 people · 2025
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Nashville

SupplierPopulation served
METRO WATER SERVICES 778,153
HARPETH VALLEY U.D. 65,518

Frequently asked questions about Nashville tap water

Is Nashville tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Nashville. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Nashville?

2 public water suppliers report drinking-water monitoring for Nashville, Tennessee to the EPA. Each is listed above with its population served.

What contaminants are in Nashville's water?

The contaminants EPA monitoring detected in Nashville include Fluoride, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Barium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.