What was found in ZIP 30548
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 |
|---|---|---|---|
| Lithium | 24.2 µg/L No EPA limit set Highest in the ZIP: BRASELTON · 20,469 people · 2025 | 1/5 | UCMR-5 |
| Pfhxa | 0.0073 µg/L No EPA limit set Highest in the ZIP: WINDER · 51,540 people · 2024 | 1/5 | UCMR-5 |
| Pfpea | 0.0061 µg/L No EPA limit set Highest in the ZIP: WINDER · 51,540 people · 2024 | 1/5 | UCMR-5 |
| PFOS | 0.0046 µg/L No EPA limit set Highest in the ZIP: BRASELTON · 20,469 people · 2025 | 2/5 | UCMR-5 |
| PFOA | 0.0045 µg/L No EPA limit set Highest in the ZIP: WINDER · 51,540 people · 2024 | 2/5 | UCMR-5 |
| PFBS | 0.0041 µg/L No EPA limit set Highest in the ZIP: WINDER · 51,540 people · 2024 | 2/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: GWINNETT CO. DEPT. OF WATER RESOURCES · 975,000 people · 2023
Highest in the ZIP: 0.00087 mg/L — BARROW COUNTY WATER SYSTEM · 17,893 people · 2025 | 5/5 | 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 30548
| Supplier | State | Population served |
|---|---|---|
| GWINNETT CO. DEPT. OF WATER RESOURCES | GA | 975,000 |
| WINDER | GA | 51,540 |
| JACKSON COUNTY WATER & SEWER AUTHORITY | GA | 33,601 |
| BRASELTON | GA | 20,469 |
| BARROW COUNTY WATER SYSTEM | GA | 17,893 |
Frequently asked questions about ZIP 30548 tap water
Is the tap water in ZIP 30548 safe to drink?
EPA testing detected 7 contaminants across the water suppliers serving ZIP 30548. 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 30548?
5 public water suppliers report EPA drinking-water monitoring for ZIP 30548. Each is listed above with its population served.
What contaminants are in ZIP 30548's water?
EPA monitoring detected Lithium, Pfhxa, Pfpea, PFOS, PFOA, and others across this ZIP's suppliers. The full list with levels and sources is above.