What was found in Monroe'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 | 2250 µg/L 23% of the EPA limit 10000 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 3410 µg/L — ARROW PARK INC. CWS · 83 people · 2019 | 9/13 | SYR4 |
| Fluoride | 203 µg/L 5.1% of the EPA limit 4000 µg/L Highest in the city: MANSION RIDGE WATER COMPANY · 276 people · 2017 | 1/13 | SYR4 |
| TTHM | 95.4 µg/L 119% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 110 µg/L — MONROE WD #10 (PINE TREE RD) · 50 people · 2019 | 13/13 | SYR4 |
| Total Haloacetic Acids (HAA5) | 59.66 µg/L 99% of the EPA limit 60 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 71.25 µg/L — MONROE WD #01 (HIGH RIDGE) · 308 people · 2019 | 13/13 | SYR4 |
| Barium | 13.5 µg/L 0.7% of the EPA limit 2000 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 42.8 µg/L — MANSION RIDGE WATER COMPANY · 276 people · 2017 | 9/13 | SYR4 |
| Combined Uranium | 23.76 µg/L 79% of the EPA limit 30 µg/L Highest in the city: MANSION RIDGE WATER COMPANY · 276 people · 2019 | 5/13 | SYR4 |
| Gross Alpha, Excl. Radon And U | 16.775 pCi/L 112% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: MONROE WD #02 (STRL MNR/HOR HTS) · 128 people · 2019 | 5/13 | SYR4 |
| Chromium | 12 µg/L 12% of the EPA limit 100 µg/L Highest in the city: MANSION RIDGE WATER COMPANY · 276 people · 2017 | 2/13 | SYR4 |
| Selenium | 4.5 µg/L 9% of the EPA limit 50 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 5.17 µg/L — MANSION RIDGE WATER COMPANY · 276 people · 2017 | 3/13 | SYR4 |
| Cyanide | 5 µg/L 2.5% of the EPA limit 200 µg/L Highest in the city: MONROE WD #12 (MONROE HILLS ESTATES) · 120 people · 2018 | 1/13 | SYR4 |
| Combined Radium (-226 And -228) | 2.9695 pCi/L 59% of the EPA limit 5 pCi/L Highest in the city: MONROE WD #02 (STRL MNR/HOR HTS) · 128 people · 2019 | 2/13 | SYR4 |
| 1,1-Dichloroethylene | 2.82 µg/L 40% of the EPA limit 7 µg/L Highest in the city: QUEEN OF APOSTLES · 45 people · 2017 | 1/13 | SYR4 |
| Arsenic | 0.5000 µg/L 5% of the EPA limit 10 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019
Highest in the city: 2.7 µg/L — CROMWELL HILL COMMONS · 179 people · 2019 | 3/13 | SYR4 |
| Dalapon | 0.7200 µg/L 0.4% of the EPA limit 200 µg/L Main supplier: MONROE VILLAGE · 12,000 people · 2019 | 1/13 | SYR4 |
| Pfpea | 0.0113 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 2/13 | UCMR-5 |
| PFOA | 0.0105 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 2/13 | UCMR-5 |
| Pfhxa | 0.0082 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 2/13 | UCMR-5 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: MONROE VILLAGE · 12,000 people · 2023
Highest in the city: 0.0073 mg/L — MANSION RIDGE WATER COMPANY · 276 people · 2024 | 13/13 | LCR |
| Pfba | 0.0067 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 1/13 | UCMR-5 |
| PFOS | 0.0057 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 1/13 | UCMR-5 |
| Pfhpa | 0.0046 µg/L No EPA limit set Main supplier: MONROE VILLAGE · 12,000 people · 2023 | 1/13 | UCMR-5 |
| PFBS | 0.0044 µg/L No EPA limit set Highest in the city: ARROW PARK INC. CWS · 83 people · 2025 | 1/13 | UCMR-5 |
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 Monroe
| Supplier | Population served |
|---|---|
| MONROE VILLAGE | 12,000 |
| MONROE WD #08 (SKYVIEW HILLS) | 544 |
| MONROE WD #01 (HIGH RIDGE) | 308 |
| MANSION RIDGE WATER COMPANY | 276 |
| LAMPLIGHT VILLAGE | 260 |
| MONROE WD #14 (ORCHARD HILL EST.) | 196 |
| CROMWELL HILL COMMONS | 179 |
| MONROE WD #02 (STRL MNR/HOR HTS) | 128 |
| MONROE WD #12 (MONROE HILLS ESTATES) | 120 |
| ARROW PARK INC. CWS | 83 |
| MONROE WD #10 (PINE TREE RD) | 50 |
| MONROE WD #07 (ORECO TERRACE) | 47 |
| QUEEN OF APOSTLES | 45 |
Frequently asked questions about Monroe tap water
Is Monroe tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Monroe. 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 Monroe?
13 public water suppliers report drinking-water monitoring for Monroe, New York to the EPA. Each is listed above with its population served.
What contaminants are in Monroe's water?
The contaminants EPA monitoring detected in Monroe include Nitrate, Fluoride, TTHM, Total Haloacetic Acids (HAA5), 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.