What was found in ZIP 37186
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 | 463 µg/L 4.6% of the EPA limit 10000 µg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2019
Highest in the ZIP: 3340 µg/L — LAFAYETTE WATER SYSTEM · 21,551 people · 2018 | 2/4 | SYR4 |
| Fluoride | 687 µg/L 17% of the EPA limit 4000 µg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2017 | 1/4 | SYR4 |
| TTHM | 56.235 µg/L 70% of the EPA limit 80 µg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2019
Highest in the ZIP: 63.730000000000004 µg/L — CASTALIAN SPRINGS-BETHPAGE U.D. · 14,184 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35.019999999999996 µg/L 58% of the EPA limit 60 µg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2019
Highest in the ZIP: 52.725 µg/L — LAFAYETTE WATER SYSTEM · 21,551 people · 2019 | 4/4 | SYR4 |
| Barium | 21.1 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2017 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.3 pCi/L 8.7% of the EPA limit 15 pCi/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2014 | 1/4 | SYR4 |
| Atrazine | 0.2396 µg/L 8% of the EPA limit 3 µg/L Highest in the ZIP: LAFAYETTE WATER SYSTEM · 21,551 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: GALLATIN WATER DEPARTMENT · 65,964 people · 2025
Highest in the ZIP: 0.0030 mg/L — LAFAYETTE WATER SYSTEM · 21,551 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 37186
| Supplier | State | Population served |
|---|---|---|
| GALLATIN WATER DEPARTMENT | TN | 65,964 |
| LAFAYETTE WATER SYSTEM | TN | 21,551 |
| CASTALIAN SPRINGS-BETHPAGE U.D. | TN | 14,184 |
| WESTMORELAND WATER SYSTEM | TN | 6,330 |
Frequently asked questions about ZIP 37186 tap water
Is the tap water in ZIP 37186 safe to drink?
EPA testing detected 8 contaminants across the water suppliers serving ZIP 37186. 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 37186?
4 public water suppliers report EPA drinking-water monitoring for ZIP 37186. Each is listed above with its population served.
What contaminants are in ZIP 37186's water?
EPA monitoring detected Nitrate, Fluoride, TTHM, Total Haloacetic Acids (HAA5), Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.