What was found in ZIP 45409
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 | 1590 µg/L 16% of the EPA limit 10000 µg/L Highest in the ZIP: OAKWOOD CITY PWS · 9,572 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 1472 µg/L 15% of the EPA limit 10000 µg/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 2/3 | SYR4 |
| Fluoride | 977.5 µg/L 24% of the EPA limit 4000 µg/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 2/3 | SYR4 |
| Copper | 80.49 µg/L 6.2% of the EPA limit 1300 µg/L Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019
Highest in the ZIP: 509.2 µg/L — OAKWOOD CITY PWS · 9,572 people · 2019 | 3/3 | SYR4 |
| Nitrite | 186 µg/L 19% of the EPA limit 1000 µg/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 1/3 | SYR4 |
| Barium | 94.525 µg/L 4.7% of the EPA limit 2000 µg/L Highest in the ZIP: OAKWOOD CITY PWS · 9,572 people · 2018 | 2/3 | SYR4 |
| TTHM | 44.895 µg/L 56% of the EPA limit 80 µg/L Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Lead | 20.52 µg/L 137% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Chloroform | 17.7 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 17.2 pCi/L No EPA limit set Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 1/3 | SYR4 |
| Bromodichloromethane | 13.09 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 10.4 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.78 µg/L 16% of the EPA limit 60 µg/L Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 3/3 | SYR4 |
| Bromoform | 3.1405 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019
Highest in the ZIP: 6.5845 µg/L — OAKWOOD CITY PWS · 9,572 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 4.57 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 3.8 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019
Highest in the ZIP: 4.2788 µg/L — OAKWOOD CITY PWS · 9,572 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.65 µg/L No EPA limit set Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 2.53 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 1.8 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2019
Highest in the ZIP: 2.38 µg/L — DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.3 pCi/L 26% of the EPA limit 5 pCi/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 1.063 µg/L 21% of the EPA limit 5 µg/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.7800 µg/L 16% of the EPA limit 5 µg/L Highest in the ZIP: OAKWOOD CITY PWS · 9,572 people · 2018 | 1/3 | SYR4 |
| cis-1,2-Dichloroethylene | 0.6665 µg/L 1% of the EPA limit 70 µg/L Highest in the ZIP: DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2025
Highest in the ZIP: 0.4700 mg/L — DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2026 | 3/3 | LCR |
| PFHXS | 0.0107 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2024 | 3/3 | UCMR-5 |
| PFOS | 0.0096 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2024
Highest in the ZIP: 0.0100 µg/L — DAYTON PUBLIC WATER SYSTEM · 141,407 people · 2023 | 2/3 | UCMR-5 |
| PFBS | 0.0032 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2024
Highest in the ZIP: 0.0053 µg/L — OAKWOOD CITY PWS · 9,572 people · 2024 | 3/3 | UCMR-5 |
| Pfpea | 0.0052 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2024
Highest in the ZIP: 0.0053 µg/L — OAKWOOD CITY PWS · 9,572 people · 2024 | 3/3 | UCMR-5 |
| Pfhxa | 0.0050 µg/L No EPA limit set Main supplier: MONTGOMERY COUNTY WATER SERVICES 1 PWS · 150,207 people · 2024 | 3/3 | 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.
Water suppliers serving ZIP 45409
| Supplier | State | Population served |
|---|---|---|
| MONTGOMERY COUNTY WATER SERVICES 1 PWS | OH | 150,207 |
| DAYTON PUBLIC WATER SYSTEM | OH | 141,407 |
| OAKWOOD CITY PWS | OH | 9,572 |
Frequently asked questions about ZIP 45409 tap water
Is the tap water in ZIP 45409 safe to drink?
EPA testing detected 29 contaminants across the water suppliers serving ZIP 45409. 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 45409?
3 public water suppliers report EPA drinking-water monitoring for ZIP 45409. Each is listed above with its population served.
What contaminants are in ZIP 45409's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.