What was found in Grand Island'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 |
|---|---|---|---|
| Fluoride | 980 µg/L 25% of the EPA limit 4000 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 1001 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2019 | 2/2 | SYR4 |
| Nitrate | 191 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 200 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2016 | 2/2 | SYR4 |
| Nitrate-Nitrite | 191 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2016
Highest in the city: 194.39 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2019 | 2/2 | SYR4 |
| TTHM | 51.025 µg/L 64% of the EPA limit 80 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Chloroform | 32.2 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.927999999999997 µg/L 33% of the EPA limit 60 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 27.699999999999996 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2013 | 2/2 | SYR4 |
| Barium | 24.729999999999997 µg/L 1.2% of the EPA limit 2000 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 8.548 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 14.299999999999997 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2013 | 2/2 | SYR4 |
| Bromodichloromethane | 13.174999999999999 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 10.674999999999999 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 11 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2013 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.778999999999996 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 9 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2013 | 2/2 | SYR4 |
| Dibromochloromethane | 5.734999999999999 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 3.0849999999999955 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.2619999999999998 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Arsenic | 0.8850 µg/L 8.9% of the EPA limit 10 µg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019
Highest in the city: 0.8900 µg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.8800 pCi/L 5.9% of the EPA limit 15 pCi/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2018 | 1/2 | SYR4 |
| Bromoform | 0.6880 µg/L No EPA limit set Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.3500 pCi/L 7% of the EPA limit 5 pCi/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2018 | 2/2 | SYR4 |
| Combined Uranium | 0.0360 µg/L 0.1% of the EPA limit 30 µg/L Highest in the city: NIAGARA COUNTY WATER DISTRICT · 0 people · 2014 | 1/2 | SYR4 |
| Lead | 0.0011 mg/L 7.5% of the EPA limit 0.0150 mg/L Main supplier: GRAND ISLAND TOWN WATER DEPT. · 19,500 people · 2023
Highest in the city: 0.0060 mg/L — NIAGARA COUNTY WATER DISTRICT · 0 people · 2023 | 2/2 | 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 Grand Island
| Supplier | Population served |
|---|---|
| GRAND ISLAND TOWN WATER DEPT. | 19,500 |
| NIAGARA COUNTY WATER DISTRICT | 0 |
Frequently asked questions about Grand Island tap water
Is Grand Island tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Grand Island. 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 Grand Island?
2 public water suppliers report drinking-water monitoring for Grand Island, New York to the EPA. Each is listed above with its population served.
What contaminants are in Grand Island's water?
The contaminants EPA monitoring detected in Grand Island include Fluoride, Nitrate, Nitrate-Nitrite, TTHM, Chloroform. 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.