What was found in ZIP 11746
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 |
|---|---|---|---|
| Pfhxa | 0.0435 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| Pfpea | 0.0394 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 3/4 | UCMR-5 |
| 6:2 Fts | 0.0236 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 2/4 | UCMR-5 |
| PFOS | 0.0174 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| Pfba | 0.0126 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| PFHXS | 0.0108 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 2/4 | UCMR-5 |
| Pfhpa | 0.0096 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| PFOA | 0.0065 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| PFNA | 0.0057 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| PFBS | 0.0052 µg/L No EPA limit set Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0013 mg/L 8.3% of the EPA limit 0.0150 mg/L Main supplier: SUFFOLK COUNTY WATER AUTHORITY · 1,100,000 people · 2027
Highest in the ZIP: 0.0013 mg/L — SOUTH HUNTINGTON WATER DISTRICT · 81,760 people · 2026 | 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 11746
| Supplier | State | Population served |
|---|---|---|
| SUFFOLK COUNTY WATER AUTHORITY | NY | 1,100,000 |
| SOUTH HUNTINGTON WATER DISTRICT | NY | 81,760 |
| GREENLAWN WATER DISTRICT | NY | 42,000 |
| DIX HILLS WATER DISTRICT | NY | 34,522 |
Frequently asked questions about ZIP 11746 tap water
Is the tap water in ZIP 11746 safe to drink?
EPA testing detected 11 contaminants across the water suppliers serving ZIP 11746. 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 11746?
4 public water suppliers report EPA drinking-water monitoring for ZIP 11746. Each is listed above with its population served.
What contaminants are in ZIP 11746's water?
EPA monitoring detected Pfhxa, Pfpea, 6:2 Fts, PFOS, Pfba, and others across this ZIP's suppliers. The full list with levels and sources is above.