What was found in ZIP 37148
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 | 1300 µg/L 13% of the EPA limit 10000 µg/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2019 | 1/2 | SYR4 |
| TTHM | 74.55 µg/L 93% of the EPA limit 80 µg/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 55.925 µg/L 93% of the EPA limit 60 µg/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.6 pCi/L 17% of the EPA limit 15 pCi/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2014 | 1/2 | SYR4 |
| 2,4-D | 0.2950 µg/L 0.4% of the EPA limit 70 µg/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: PORTLAND WATER SYSTEM · 25,761 people · 2025 | 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 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 37148
| Supplier | State | Population served |
|---|---|---|
| PORTLAND WATER SYSTEM | TN | 25,761 |
| CASTALIAN SPRINGS-BETHPAGE U.D. | TN | 14,184 |
Frequently asked questions about ZIP 37148 tap water
Is the tap water in ZIP 37148 safe to drink?
EPA testing detected 6 contaminants across the water suppliers serving ZIP 37148. 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 37148?
2 public water suppliers report EPA drinking-water monitoring for ZIP 37148. Each is listed above with its population served.
What contaminants are in ZIP 37148's water?
EPA monitoring detected Nitrate, TTHM, Total Haloacetic Acids (HAA5), Gross Alpha, Excl. Radon And U, 2,4-D, and others across this ZIP's suppliers. The full list with levels and sources is above.