What was found in ZIP 11580
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-Nitrite | 132 µg/L 1.3% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 5783 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Nitrate | 140 µg/L 1.4% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 5760.5 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Copper | 166.05 µg/L 13% of the EPA limit 1300 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Nitrite | 147 µg/L 15% of the EPA limit 1000 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Fluoride | 140 µg/L 3.5% of the EPA limit 4000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Barium | 26 µg/L 1.3% of the EPA limit 2000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 62.05 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| cis-1,2-Dichloroethylene | 0.9350 µg/L 1.3% of the EPA limit 70 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 23.41 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Tetrachloroethylene | 9.41 µg/L 188% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 16.94 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Lithium | 14.9 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025 | 1/2 | UCMR-5 |
| TTHM | 9.18 µg/L 11% of the EPA limit 80 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 12.21 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Toluene | 11.3 µg/L 1.1% of the EPA limit 1000 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 1.21 µg/L 24% of the EPA limit 5 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 10.035 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Chromium | 10 µg/L 10% of the EPA limit 100 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 7.5 µg/L 107% of the EPA limit, at the 95th percentile of samples — 7 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Lead | 7.49 µg/L 50% of the EPA limit 15 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 5.018 µg/L 17% of the EPA limit 30 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 7.06016 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Bromoform | 2.775 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 5.9 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4.865 pCi/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 5.658 pCi/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.9555 pCi/L 33% of the EPA limit 15 pCi/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 4.2725 pCi/L 85% of the EPA limit 5 pCi/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 4.67 pCi/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 3.1 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 4.1 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.495 µg/L 2.5% of the EPA limit 60 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 3.835 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2018 | 2/2 | SYR4 |
| Chloroform | 2.476 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 3.26 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.12 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 1.6 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 2.98 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2018 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.26 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019
Highest in the ZIP: 2.94 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2018 | 2/2 | SYR4 |
| Selenium | 2.86 µg/L 5.7% of the EPA limit 50 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2.055 µg/L 21% of the EPA limit 10 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 1/2 | SYR4 |
| Carbon Tetrachloride | 2.02 µg/L 40% of the EPA limit 5 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 2 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Thallium, Total | 1.8335 µg/L 92% of the EPA limit 2 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Vinyl Chloride | 1.8 µg/L 90% of the EPA limit 2 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| 1,1,1-Trichloroethane | 1.7 µg/L 0.9% of the EPA limit 200 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.7 µg/L 28% of the EPA limit 6 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 2/2 | SYR4 |
| Chlorobenzene | 1.4975 µg/L 1.5% of the EPA limit 100 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.38 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 1.1 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2018 | 1/2 | SYR4 |
| Antimony, Total | 0.8100 µg/L 14% of the EPA limit 6 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 1/2 | SYR4 |
| 1,2-Dichloroethane | 0.7490 µg/L 15% of the EPA limit 5 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| P-Dichlorobenzene | 0.7000 µg/L 0.9% of the EPA limit 75 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Dichloromethane | 0.6425 µg/L 13% of the EPA limit 5 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Beryllium, Total | 0.5000 µg/L 13% of the EPA limit 4 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2019 | 1/2 | SYR4 |
| Endrin | 0.0630 µg/L 3.2% of the EPA limit 2 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Heptachlor Epoxide | 0.0435 µg/L 22% of the EPA limit 0.2000 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| Ethylene Dibromide | 0.0300 µg/L 60% of the EPA limit 0.0500 µg/L Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2019 | 1/2 | SYR4 |
| PFOA | 0.0100 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0095 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0074 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
| Pfba | 0.0071 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
| PFHXS | 0.0063 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025 | 2/2 | UCMR-5 |
| PFOS | 0.0051 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025
Highest in the ZIP: 0.0061 µg/L — WA OF WESTERN NASSAU · 120,000 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0042 mg/L 28% of the EPA limit 0.0150 mg/L Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025 | 2/2 | LCR |
| PFNA | 0.0041 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - LYNBROOK · 220,000 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0036 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
| Pfhpa | 0.0034 µg/L No EPA limit set Highest in the ZIP: WA OF WESTERN NASSAU · 120,000 people · 2024 | 1/2 | UCMR-5 |
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 11580
| Supplier | State | Population served |
|---|---|---|
| LIBERTY UTILITIES NEW YORK - LYNBROOK | NY | 220,000 |
| WA OF WESTERN NASSAU | NY | 120,000 |
Frequently asked questions about ZIP 11580 tap water
Is the tap water in ZIP 11580 safe to drink?
EPA testing detected 55 contaminants across the water suppliers serving ZIP 11580. 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 11580?
2 public water suppliers report EPA drinking-water monitoring for ZIP 11580. Each is listed above with its population served.
What contaminants are in ZIP 11580's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Copper, Nitrite, Fluoride, and others across this ZIP's suppliers. The full list with levels and sources is above.