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Tap water quality report

Dayton, TN

EPA monitoring detected 9 contaminants across the 2 water suppliers serving Dayton. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
25,204
people served
9
contaminants found
Tennessee rankings Lead in Tennessee PFAS in Tennessee

What was found in Dayton's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
840 µg/L 21%
of the EPA limit 4000 µg/L
 1/2 SYR4
Nitrate
455 µg/L 4.6%
of the EPA limit 10000 µg/L
 1/2 SYR4
TTHM
153 µg/L 191%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Total Haloacetic Acids (HAA5)
124 µg/L 207%
of the EPA limit, in the worst sample — 60 µg/L
 2/2 SYR4
Barium
27 µg/L 1.4%
of the EPA limit 2000 µg/L
 1/2 SYR4
Chlorobenzene
1.19 µg/L 1.2%
of the EPA limit 100 µg/L
 1/2 SYR4
Toluene
1.08 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/2 SYR4
Xylenes, Total
0.8480 µg/L 0%
of the EPA limit 10000 µg/L
 1/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Dayton

SupplierPopulation served
DAYTON WATER DEPT 25,054
LAURELBROOK SCHOOL 150

Frequently asked questions about Dayton tap water

Is Dayton tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Dayton. 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 Dayton?

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

What contaminants are in Dayton's water?

The contaminants EPA monitoring detected in Dayton include Fluoride, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Barium. The full list, with the highest level found 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.