What was found in Great Neck's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3677.5 µg/L 37% of the EPA limit 10000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 3652 µg/L 37% of the EPA limit 10000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Nitrite | 2473 µg/L 247% of the EPA limit, at the 95th percentile of samples — 1000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Fluoride | 220 µg/L 5.5% of the EPA limit 4000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Barium | 66.33 µg/L 3.3% of the EPA limit 2000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Copper | 54.6 µg/L 4.2% of the EPA limit 1300 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Arsenic | 17.6 µg/L 176% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Cyanide | 16.8 µg/L 8.4% of the EPA limit 200 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 14.68 µg/L 294% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Beryllium, Total | 10 µg/L 250% of the EPA limit, at the 95th percentile of samples — 4 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| TTHM | 8.388 µg/L 10% of the EPA limit 80 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| cis-1,2-Dichloroethylene | 8.125 µg/L 12% of the EPA limit 70 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 5.909 µg/L 118% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Selenium | 5.815 µg/L 12% of the EPA limit 50 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Bromoform | 5.399 µg/L No EPA limit set Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 2.9315 pCi/L No EPA limit set Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 2.796 µg/L No EPA limit set Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.055 pCi/L 41% of the EPA limit 5 pCi/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.9745 µg/L No EPA limit set Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Lead | 1.82 µg/L 12% of the EPA limit 15 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 1.39017 µg/L 4.6% of the EPA limit 30 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Toluene | 1.325 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Vinyl Chloride | 1.1 µg/L 55% of the EPA limit 2 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| 1,1-Dichloroethylene | 0.9100 µg/L 13% of the EPA limit 7 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Carbon Tetrachloride | 0.8790 µg/L 18% of the EPA limit 5 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| 1,1,2-Trichloroethane | 0.6685 µg/L 13% of the EPA limit 5 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6000 µg/L 10% of the EPA limit 6 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Mercury | 0.5900 µg/L 30% of the EPA limit 2 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Chloroform | 0.5520 µg/L No EPA limit set Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| 1,1,1-Trichloroethane | 0.5000 µg/L 0.3% of the EPA limit 200 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Chlordane | 0.2100 µg/L 11% of the EPA limit 2 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.2010 pCi/L 1.3% of the EPA limit 15 pCi/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Heptachlor Epoxide | 0.0273 µg/L 14% of the EPA limit 0.2000 µg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: WA OF GREAT NECK NORTH · 31,400 people · 2025 | 1/1 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Great Neck
| Supplier | Population served |
|---|---|
| WA OF GREAT NECK NORTH | 31,400 |
Frequently asked questions about Great Neck tap water
Is Great Neck tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Great Neck. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Great Neck?
1 public water supplier report drinking-water monitoring for Great Neck, New York to the EPA. Each is listed above with its population served.
What contaminants are in Great Neck's water?
The contaminants EPA monitoring detected in Great Neck include Nitrate, Nitrate-Nitrite, Nitrite, Fluoride, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.