What was found in ZIP 37748
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 536.35 µg/L 13% of the EPA limit 4000 µg/L Highest in the ZIP: CUMBERLAND UTILITY DISTRICT · 14,085 people · 2017 | 1/4 | SYR4 |
| Nitrate | 230 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: HARRIMAN UTILITY BOARD · 16,653 people · 2019 | 2/4 | SYR4 |
| TTHM | 90.54 µg/L 113% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: HARRIMAN UTILITY BOARD · 16,653 people · 2019
Highest in the ZIP: 110 µg/L — ROANE CENTRAL UTILITY DISTRICT · 5,317 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 60.84 µg/L 101% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: HARRIMAN UTILITY BOARD · 16,653 people · 2019
Highest in the ZIP: 70.6 µg/L — ROANE CENTRAL UTILITY DISTRICT · 5,317 people · 2019 | 4/4 | SYR4 |
| Barium | 20.365 µg/L 1% of the EPA limit 2000 µg/L Highest in the ZIP: CUMBERLAND UTILITY DISTRICT · 14,085 people · 2017 | 1/4 | SYR4 |
| Pfba | 0.0140 µg/L No EPA limit set Highest in the ZIP: ROANE CENTRAL UTILITY DISTRICT · 5,317 people · 2025 | 3/4 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: HARRIMAN UTILITY BOARD · 16,653 people · 2025 | 4/4 | 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.
Water suppliers serving ZIP 37748
| Supplier | State | Population served |
|---|---|---|
| HARRIMAN UTILITY BOARD | TN | 16,653 |
| CUMBERLAND UTILITY DISTRICT | TN | 14,085 |
| PLATEAU UTILITY DISTRICT | TN | 12,074 |
| ROANE CENTRAL UTILITY DISTRICT | TN | 5,317 |
Frequently asked questions about ZIP 37748 tap water
Is the tap water in ZIP 37748 safe to drink?
EPA testing detected 7 contaminants across the water suppliers serving ZIP 37748. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 37748?
4 public water suppliers report EPA drinking-water monitoring for ZIP 37748. Each is listed above with its population served.
What contaminants are in ZIP 37748's water?
EPA monitoring detected Fluoride, Nitrate, TTHM, Total Haloacetic Acids (HAA5), Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.