What was found in ZIP 11590
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 | 9252 µg/L 93% of the EPA limit 10000 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Nitrate | 9230 µg/L 92% of the EPA limit 10000 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Copper | 90 µg/L 6.9% of the EPA limit 1300 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019
Highest in the ZIP: 360 µg/L — WESTBURY WD · 20,500 people · 2019 | 3/3 | SYR4 |
| Fluoride | 214 µg/L 5.4% of the EPA limit 4000 µg/L Highest in the ZIP: WESTBURY WD · 20,500 people · 2019 | 1/3 | SYR4 |
| Barium | 32.6 µg/L 1.6% of the EPA limit 2000 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| 1,1,1-Trichloroethane | 19.32 µg/L 9.7% of the EPA limit 200 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Carbon Tetrachloride | 17.497 µg/L 350% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 17.2375 µg/L 345% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| 1,1-Dichloroethylene | 16.99 µg/L 243% of the EPA limit, at the 95th percentile of samples — 7 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| Tetrachloroethylene | 15.9 µg/L 318% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 3/3 | SYR4 |
| cis-1,2-Dichloroethylene | 14.07 µg/L 20% of the EPA limit 70 µg/L Main supplier: 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 Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Chloroform | 9.28 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| 1,1,2-Trichloroethane | 6.77 µg/L 135% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6.144 pCi/L 41% of the EPA limit 15 pCi/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 2/3 | SYR4 |
| Lead | 4.8 µg/L 32% of the EPA limit 15 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019
Highest in the ZIP: 6.08 µg/L — WESTBURY WD · 20,500 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.794 pCi/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018
Highest in the ZIP: 5.3 pCi/L — CARLE PLACE WD · 9,005 people · 2019 | 3/3 | SYR4 |
| Arsenic | 4.51 µg/L 45% of the EPA limit 10 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 4.211 µg/L 14% of the EPA limit 30 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.272 pCi/L 65% of the EPA limit 5 pCi/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018
Highest in the ZIP: 4.0315 pCi/L — WESTBURY WD · 20,500 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 3.916 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| TTHM | 3.875 µg/L 4.8% of the EPA limit 80 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Selenium | 3.64 µg/L 7.3% of the EPA limit 50 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Dibromochloromethane | 3.1 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Chromium | 3 µg/L 3% of the EPA limit 100 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Thallium, Total | 2.88 µg/L 144% of the EPA limit, at the 95th percentile of samples — 2 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Bromoform | 2.52 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Toluene | 1.504 µg/L 0.2% of the EPA limit 1000 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019
Highest in the ZIP: 1.95 µg/L — WESTBURY WD · 20,500 people · 2019 | 2/3 | SYR4 |
| Mercury | 1.82 µg/L 91% of the EPA limit 2 µg/L Main supplier: 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 Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 1/3 | SYR4 |
| Dichloroacetic Acid | 1.67 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2018 | 1/3 | SYR4 |
| Cadmium | 0.1000 µg/L 2% of the EPA limit 5 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019
Highest in the ZIP: 1.62 µg/L — WESTBURY WD · 20,500 people · 2019 | 2/3 | SYR4 |
| Vinyl Chloride | 1.578 µg/L 79% of the EPA limit 2 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 1.45 µg/L 24% of the EPA limit 6 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| 1,2-Dichloroethane | 1.42 µg/L 28% of the EPA limit 5 µg/L Main supplier: 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 Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019
Highest in the ZIP: 1.33 µg/L — WESTBURY WD · 20,500 people · 2019 | 2/3 | SYR4 |
| trans-1,2-Dichloroethylene | 1.2055 µg/L 1.2% of the EPA limit 100 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| Styrene | 1.17 µg/L 1.2% of the EPA limit 100 µg/L Main supplier: 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 Main supplier: 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 Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6400 µg/L 11% of the EPA limit 6 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 1/3 | SYR4 |
| Pentachlorophenol | 0.1167 µg/L 12% of the EPA limit 1 µg/L Highest in the ZIP: WESTBURY WD · 20,500 people · 2019 | 2/3 | SYR4 |
| Ethylene Dibromide | 0.0400 µg/L 80% of the EPA limit 0.0500 µg/L Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2019 | 2/3 | SYR4 |
| PFOA | 0.0076 µg/L No EPA limit set Highest in the ZIP: WESTBURY WD · 20,500 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0042 µg/L No EPA limit set Main supplier: TOWN OF HEMPSTEAD WATER DEPARTMENT · 110,000 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Highest in the ZIP: WESTBURY WD · 20,500 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: 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 11590
| Supplier | State | Population served |
|---|---|---|
| TOWN OF HEMPSTEAD WATER DEPARTMENT | NY | 110,000 |
| WESTBURY WD | NY | 20,500 |
| CARLE PLACE WD | NY | 9,005 |
Frequently asked questions about ZIP 11590 tap water
Is the tap water in ZIP 11590 safe to drink?
EPA testing detected 47 contaminants across the water suppliers serving ZIP 11590. 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 11590?
3 public water suppliers report EPA drinking-water monitoring for ZIP 11590. Each is listed above with its population served.
What contaminants are in ZIP 11590's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Copper, Fluoride, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.