What was found in ZIP 37820
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 |
|---|---|---|---|
| Nitrate | 670 µg/L 6.7% of the EPA limit 10000 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019
Highest in the ZIP: 2790 µg/L — JEFFERSON CITY W&S COMM · 9,764 people · 2019 | 2/4 | SYR4 |
| Fluoride | 742.5 µg/L 19% of the EPA limit 4000 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019 | 1/4 | SYR4 |
| Nitrate-Nitrite | 637.5 µg/L 6.4% of the EPA limit 10000 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019 | 1/4 | SYR4 |
| TTHM | 72.595 µg/L 91% of the EPA limit 80 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019
Highest in the ZIP: 94.075 µg/L — SHADY GROVE UTILITY DISTRICT · 25,320 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 49.68 µg/L 83% of the EPA limit 60 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019
Highest in the ZIP: 57.06 µg/L — SHADY GROVE UTILITY DISTRICT · 25,320 people · 2019 | 4/4 | SYR4 |
| Barium | 28 µg/L 1.4% of the EPA limit 2000 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019 | 1/4 | SYR4 |
| Copper | 12.6 µg/L 1% of the EPA limit 1300 µg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2019 | 1/4 | SYR4 |
| Lead | 0.00060 mg/L 4% of the EPA limit 0.0150 mg/L Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2025
Highest in the ZIP: 0.0095 mg/L — JEFFERSON CITY W&S COMM · 9,764 people · 2025 | 4/4 | LCR |
| Pfpea | 0.0047 µg/L No EPA limit set Highest in the ZIP: SHADY GROVE UTILITY DISTRICT · 25,320 people · 2024 | 3/4 | UCMR-5 |
| PFOS | 0.0042 µg/L No EPA limit set Highest in the ZIP: SHADY GROVE UTILITY DISTRICT · 25,320 people · 2024 | 1/4 | UCMR-5 |
| PFBS | 0.0037 µg/L No EPA limit set Main supplier: KNOXVILLE UTILITIES BOARD - KUB · 254,671 people · 2024
Highest in the ZIP: 0.0038 µg/L — JEFFERSON CITY W&S COMM · 9,764 people · 2024 | 3/4 | UCMR-5 |
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 37820
| Supplier | State | Population served |
|---|---|---|
| KNOXVILLE UTILITIES BOARD - KUB | TN | 254,671 |
| SHADY GROVE UTILITY DISTRICT | TN | 25,320 |
| JEFFERSON CITY W&S COMM | TN | 9,764 |
| NEW MARKET UTILITY DISTRICT | TN | 5,703 |
Frequently asked questions about ZIP 37820 tap water
Is the tap water in ZIP 37820 safe to drink?
EPA testing detected 11 contaminants across the water suppliers serving ZIP 37820. 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 37820?
4 public water suppliers report EPA drinking-water monitoring for ZIP 37820. Each is listed above with its population served.
What contaminants are in ZIP 37820's water?
EPA monitoring detected Nitrate, Fluoride, Nitrate-Nitrite, TTHM, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.