What was found in ZIP 11756
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 | 226 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 9252 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Nitrate | 230 µg/L 2.3% of the EPA limit 10000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 9230 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Fluoride | 160 µg/L 4% of the EPA limit 4000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 1/3 | SYR4 |
| Lithium | 139 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2025 | 1/3 | UCMR-5 |
| Copper | 60.84 µg/L 4.7% of the EPA limit 1300 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 103.5 µg/L — BETHPAGE WD · 33,000 people · 2019 | 3/3 | SYR4 |
| cis-1,2-Dichloroethylene | 53.1 µg/L 76% of the EPA limit 70 µg/L Highest in the ZIP: BETHPAGE WD · 33,000 people · 2019 | 2/3 | SYR4 |
| Barium | 10.4 µg/L 0.5% of the EPA limit 2000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 32.6 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Trichloroethylene | 13.645 µg/L 273% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 20 µg/L — BETHPAGE WD · 33,000 people · 2019 | 3/3 | SYR4 |
| 1,1,1-Trichloroethane | 19.32 µg/L 9.7% of the EPA limit 200 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Carbon Tetrachloride | 17.497 µg/L 350% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| 1,1-Dichloroethylene | 16.99 µg/L 243% of the EPA limit, at the 95th percentile of samples — 7 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Tetrachloroethylene | 15.9 µg/L 318% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Benzene | 12.538 µg/L 251% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Cyanide | 11.2 µg/L 5.6% of the EPA limit 200 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 1/3 | SYR4 |
| Lead | 9.14 µg/L 61% of the EPA limit 15 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 10.345 µg/L — BETHPAGE WD · 33,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 2.1 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 9.28 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.7175 pCi/L 51% of the EPA limit 15 pCi/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 3/3 | SYR4 |
| 1,1,2-Trichloroethane | 6.77 µg/L 135% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 2.217 µg/L 7.4% of the EPA limit 30 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 5.9555 µg/L — BETHPAGE WD · 33,000 people · 2018 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.6625 pCi/L 53% of the EPA limit 5 pCi/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 5.824 pCi/L — BETHPAGE WD · 33,000 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 2.1685 pCi/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 4.794 pCi/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 3/3 | SYR4 |
| trans-1,2-Dichloroethylene | 4.6865 µg/L 4.7% of the EPA limit 100 µg/L Highest in the ZIP: BETHPAGE WD · 33,000 people · 2019 | 2/3 | SYR4 |
| Arsenic | 4.51 µg/L 45% of the EPA limit 10 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| TTHM | 4.09 µg/L 5.1% of the EPA limit 80 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 1.675 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 3.916 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Selenium | 3.64 µg/L 7.3% of the EPA limit 50 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 1.225 µg/L No EPA limit set Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 3.1 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 0.4400 µg/L 22% of the EPA limit 2 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 2.88 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| 1,2-Dichloroethane | 2.705 µg/L 54% of the EPA limit 5 µg/L Highest in the ZIP: BETHPAGE WD · 33,000 people · 2019 | 2/3 | SYR4 |
| Bromoform | 2.52 µg/L No EPA limit set Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Cadmium | 2.16 µg/L 43% of the EPA limit 5 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 2/3 | SYR4 |
| Mercury | 1.82 µg/L 91% of the EPA limit 2 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.685 µg/L 2.8% of the EPA limit 60 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 1/3 | SYR4 |
| Dichloroacetic Acid | 1.67 µg/L No EPA limit set Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 1/3 | SYR4 |
| Vinyl Chloride | 1.578 µg/L 79% of the EPA limit 2 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Toluene | 1.275 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019
Highest in the ZIP: 1.504 µg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Antimony, Total | 1.45 µg/L 24% of the EPA limit 6 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Styrene | 1.17 µg/L 1.2% of the EPA limit 100 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Ethylbenzene | 0.9765 µg/L 0.1% of the EPA limit 700 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Beryllium, Total | 0.9220 µg/L 23% of the EPA limit 4 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| 1,2-Dichloropropane | 0.8445 µg/L 17% of the EPA limit 5 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Dichloromethane | 0.7000 µg/L 14% of the EPA limit 5 µg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6400 µg/L 11% of the EPA limit 6 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Ethylene Dibromide | 0.0400 µg/L 80% of the EPA limit 0.0500 µg/L Highest in the ZIP: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0093 µg/L No EPA limit set Highest in the ZIP: BETHPAGE WD · 33,000 people · 2023 | 1/3 | UCMR-5 |
| Pfpea | 0.0062 µg/L No EPA limit set Highest in the ZIP: BETHPAGE WD · 33,000 people · 2023 | 2/3 | UCMR-5 |
| Pfhxa | 0.0048 µg/L No EPA limit set Highest in the ZIP: BETHPAGE WD · 33,000 people · 2023 | 1/3 | UCMR-5 |
| PFBS | 0.0035 µg/L No EPA limit set Highest in the ZIP: BETHPAGE WD · 33,000 people · 2023 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LIBERTY UTILITIES NEW YORK - MERRICK · 135,000 people · 2025
Highest in the ZIP: 0.0010 mg/L — TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2023 | 3/3 | 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 11756
| Supplier | State | Population served |
|---|---|---|
| LIBERTY UTILITIES NEW YORK - MERRICK | NY | 135,000 |
| TOWN OF HEMPSTEAD WATER DEPARTMENT | NY | 110,000 |
| BETHPAGE WD | 33,000 |
Frequently asked questions about ZIP 11756 tap water
Is the tap water in ZIP 11756 safe to drink?
EPA testing detected 50 contaminants across the water suppliers serving ZIP 11756. 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 11756?
3 public water suppliers report EPA drinking-water monitoring for ZIP 11756. Each is listed above with its population served.
What contaminants are in ZIP 11756's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Lithium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.