What was found in North Castle'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 | 2330 µg/L 23% of the EPA limit 10000 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #2 · 1,200 people · 2019 | 3/5 | SYR4 |
| Nitrate-Nitrite | 2100 µg/L 21% of the EPA limit 10000 µg/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2019 | 3/5 | SYR4 |
| Barium | 316.8 µg/L 16% of the EPA limit 2000 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 3/5 | SYR4 |
| Fluoride | 135.5 µg/L 3.4% of the EPA limit 4000 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 1/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 49.79 µg/L 83% of the EPA limit 60 µg/L Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 5/5 | SYR4 |
| TTHM | 43.37 µg/L 54% of the EPA limit 80 µg/L Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 5/5 | SYR4 |
| Cyanide | 42.6 µg/L 21% of the EPA limit 200 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2018 | 2/5 | SYR4 |
| Chloroform | 39.495 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 33.6 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 5/5 | SYR4 |
| Dichloroacetic Acid | 16.985 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 5/5 | SYR4 |
| Bromodichloromethane | 4.497 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019
Highest in the city: 16.4 µg/L — SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2019 | 5/5 | SYR4 |
| Combined Uranium | 9.64328 µg/L 32% of the EPA limit 30 µg/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2018 | 3/5 | SYR4 |
| Gross Beta Particle Activity | 8.64 pCi/L No EPA limit set Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2018 | 2/5 | SYR4 |
| Chromium | 7.475 µg/L 7.5% of the EPA limit 100 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 2/5 | SYR4 |
| Dibromochloromethane | 2.379 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019
Highest in the city: 7.317 µg/L — NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 5/5 | SYR4 |
| Bromoform | 1.245 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019
Highest in the city: 6.064 µg/L — NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 5/5 | SYR4 |
| Monochloroacetic Acid | 5.897 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 2/5 | SYR4 |
| Selenium | 4.8 µg/L 9.6% of the EPA limit 50 µg/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2017 | 1/5 | SYR4 |
| Dibromoacetic Acid | 1.3965 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019
Highest in the city: 3.667 µg/L — NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2019 | 5/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.37 pCi/L 22% of the EPA limit 15 pCi/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2018 | 3/5 | SYR4 |
| 2,4-D | 3.02 µg/L 4.3% of the EPA limit 70 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2017 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 2.1144 pCi/L 42% of the EPA limit 5 pCi/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2018 | 3/5 | SYR4 |
| Arsenic | 1.6 µg/L 16% of the EPA limit 10 µg/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2017 | 1/5 | SYR4 |
| Monobromoacetic Acid | 1.47 µg/L No EPA limit set Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2019 | 1/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.36 µg/L 23% of the EPA limit 6 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #2 · 1,200 people · 2017 | 1/5 | SYR4 |
| Toluene | 1.34 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: SAINT NERSESS ARMENIAN SEMINARY · 32 people · 2017 | 1/5 | SYR4 |
| Simazine | 0.1400 µg/L 3.5% of the EPA limit 4 µg/L Highest in the city: NORTH CASTLE WATER DISTRICT #4 · 1,225 people · 2017 | 1/5 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NORTH CASTLE WATER DISTRICT #1 · 2,500 people · 2026
Highest in the city: 0.0035 mg/L — NORTH CASTLE WATER DISTRICT #2 · 1,200 people · 2025 | 5/5 | 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 North Castle
| Supplier | Population served |
|---|---|
| NORTH CASTLE WATER DISTRICT #1 | 2,500 |
| NORTH CASTLE WATER DISTRICT #4 | 1,225 |
| NORTH CASTLE WATER DISTRICT #2 | 1,200 |
| NORTH CASTLE WATER DISTRICT #5 | 225 |
| SAINT NERSESS ARMENIAN SEMINARY | 32 |
Frequently asked questions about North Castle tap water
Is North Castle tap water safe to drink?
EPA testing detected 28 contaminants in the water serving North Castle. 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 North Castle?
5 public water suppliers report drinking-water monitoring for North Castle, New York to the EPA. Each is listed above with its population served.
What contaminants are in North Castle's water?
The contaminants EPA monitoring detected in North Castle include Nitrate, Nitrate-Nitrite, Barium, Fluoride, Total Haloacetic Acids (HAA5). 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.