What was found in ZIP 19425
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 | 4800 µg/L 48% of the EPA limit 10000 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 4830 µg/L — AQUA PA UWCHLAN · 35,518 people · 2019 | 2/2 | SYR4 |
| Copper | 270 µg/L 21% of the EPA limit 1300 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 743.5 µg/L — AQUA PA UWCHLAN · 35,518 people · 2019 | 2/2 | SYR4 |
| Fluoride | 532 µg/L 13% of the EPA limit 4000 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Barium | 304.4 µg/L 15% of the EPA limit 2000 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| TTHM | 81.985 µg/L 102% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Lead | 70.1 µg/L 467% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 62.8 µg/L 105% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Chloroform | 46.13 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 27.74 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 23.04 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 15.14 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 19.26 µg/L — AQUA PA UWCHLAN · 35,518 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.84 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 8.38 µg/L — AQUA PA UWCHLAN · 35,518 people · 2019 | 2/2 | SYR4 |
| Chromium | 6.42 µg/L 6.4% of the EPA limit 100 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.5 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 6.26 µg/L — AQUA PA UWCHLAN · 35,518 people · 2019 | 2/2 | SYR4 |
| Bromoform | 3.41 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.55 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.43 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 2/2 | SYR4 |
| Selenium | 1.185 µg/L 2.4% of the EPA limit 50 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019
Highest in the ZIP: 1.2 µg/L — AQUA PA UWCHLAN · 35,518 people · 2018 | 2/2 | SYR4 |
| Xylenes, Total | 0.7000 µg/L 0% of the EPA limit 10000 µg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 0.6000 µg/L 8.6% of the EPA limit 7 µg/L Highest in the ZIP: AQUA PA UWCHLAN · 35,518 people · 2019 | 1/2 | SYR4 |
| PFOA | 0.0059 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2024
Highest in the ZIP: 0.0093 µg/L — AQUA PA UWCHLAN · 35,518 people · 2024 | 2/2 | UCMR-5 |
| Pfpea | 0.0074 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2024
Highest in the ZIP: 0.0077 µg/L — AQUA PA UWCHLAN · 35,518 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0072 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2024 | 2/2 | UCMR-5 |
| PFOS | 0.0071 µg/L No EPA limit set Highest in the ZIP: AQUA PA UWCHLAN · 35,518 people · 2024 | 1/2 | UCMR-5 |
| Pfba | 0.0057 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2024 | 2/2 | UCMR-5 |
| PFBS | 0.0036 µg/L No EPA limit set Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2024
Highest in the ZIP: 0.0051 µg/L — AQUA PA UWCHLAN · 35,518 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: AQUA PA WEST CHESTER · 48,600 people · 2025
Highest in the ZIP: 0.0022 mg/L — AQUA PA UWCHLAN · 35,518 people · 2025 | 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.
Water suppliers serving ZIP 19425
| Supplier | State | Population served |
|---|---|---|
| AQUA PA WEST CHESTER | PA | 48,600 |
| AQUA PA UWCHLAN | PA | 35,518 |
Frequently asked questions about ZIP 19425 tap water
Is the tap water in ZIP 19425 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 19425. 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 19425?
2 public water suppliers report EPA drinking-water monitoring for ZIP 19425. Each is listed above with its population served.
What contaminants are in ZIP 19425's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Barium, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.