What was found in ZIP 37650
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 | 296 µg/L 3% of the EPA limit 10000 µg/L Main supplier: JONESBOROUGH WATER DEPT · 33,069 people · 2019
Highest in the ZIP: 3500 µg/L — ERWIN UTILITIES AUTHORITY · 12,236 people · 2019 | 2/3 | SYR4 |
| TTHM | 109 µg/L 136% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: JONESBOROUGH WATER DEPT · 33,069 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 82.575 µg/L 138% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: JONESBOROUGH WATER DEPT · 33,069 people · 2019 | 3/3 | SYR4 |
| Lithium | 51.1 µg/L No EPA limit set Highest in the ZIP: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024 | 1/3 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 0.9980 pCi/L 6.7% of the EPA limit 15 pCi/L Main supplier: JONESBOROUGH WATER DEPT · 33,069 people · 2016
Highest in the ZIP: 2.355 pCi/L — ERWIN UTILITIES AUTHORITY · 12,236 people · 2015 | 2/3 | SYR4 |
| PFBS | 0.0075 µg/L No EPA limit set Highest in the ZIP: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024 | 1/3 | UCMR-5 |
| PFOS | 0.0067 µg/L No EPA limit set Highest in the ZIP: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024 | 1/3 | UCMR-5 |
| PFOA | 0.0041 µg/L No EPA limit set Highest in the ZIP: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024 | 1/3 | UCMR-5 |
| PFHXS | 0.0036 µg/L No EPA limit set Highest in the ZIP: ERWIN UTILITIES AUTHORITY · 12,236 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: JONESBOROUGH WATER DEPT · 33,069 people · 2025 | 3/3 | 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 37650
| Supplier | State | Population served |
|---|---|---|
| JONESBOROUGH WATER DEPT | TN | 33,069 |
| ERWIN UTILITIES AUTHORITY | TN | 12,236 |
| UNICOI UTILITY DISTRICT | TN | 4,527 |
Frequently asked questions about ZIP 37650 tap water
Is the tap water in ZIP 37650 safe to drink?
EPA testing detected 10 contaminants across the water suppliers serving ZIP 37650. 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 37650?
3 public water suppliers report EPA drinking-water monitoring for ZIP 37650. Each is listed above with its population served.
What contaminants are in ZIP 37650's water?
EPA monitoring detected Nitrate, TTHM, Total Haloacetic Acids (HAA5), Lithium, Gross Alpha, Excl. Radon And U, and others across this ZIP's suppliers. The full list with levels and sources is above.