What was found in ZIP 37604
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Nitrate | 570 µg/L 5.7% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate-Nitrite | 570 µg/L 5.7% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| TTHM | 79 µg/L 99% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Barium | 62 µg/L 3.1% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 39.3 µg/L 65% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Copper | 1.2 µg/L 0.1% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.7470 pCi/L 5% of the EPA limit 15 pCi/L | 1/1 | SYR4 |
| Lead | 0.0013 mg/L 8.7% of the EPA limit 0.0150 mg/L | 1/1 | 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.
Water suppliers serving ZIP 37604
| Supplier | State | Population served |
|---|---|---|
| JOHNSON CITY WATER DEPT | TN | 105,057 |
Frequently asked questions about ZIP 37604 tap water
Is the tap water in ZIP 37604 safe to drink?
EPA testing detected 9 contaminants across the water suppliers serving ZIP 37604. 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 37604?
1 public water supplier report EPA drinking-water monitoring for ZIP 37604. Each is listed above with its population served.
What contaminants are in ZIP 37604's water?
EPA monitoring detected Fluoride, Nitrate, Nitrate-Nitrite, TTHM, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.