What was found in ZIP 19477
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 | 3070 µg/L 31% of the EPA limit 10000 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019
Highest in the ZIP: 3995 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 2/2 | SYR4 |
| Copper | 376.75 µg/L 29% of the EPA limit 1300 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019
Highest in the ZIP: 537.225 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 2/2 | SYR4 |
| Barium | 450.2 µg/L 23% of the EPA limit 2000 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Fluoride | 119 µg/L 3% of the EPA limit 4000 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 1/2 | SYR4 |
| TTHM | 78.49 µg/L 98% of the EPA limit 80 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Chloroform | 55.64 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Lead | 33.2 µg/L 221% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 32.8 µg/L 55% of the EPA limit 60 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 25.08 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 8.43 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019
Highest in the ZIP: 23.4 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 16.9 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Lithium | 16.2 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2024 | 2/2 | UCMR-5 |
| Combined Uranium | 13.7408 µg/L 46% of the EPA limit 30 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2017 | 1/2 | SYR4 |
| Trichloroacetic Acid | 10.425 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019
Highest in the ZIP: 12.4 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 2/2 | SYR4 |
| Cyanide | 10 µg/L 5% of the EPA limit 200 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Bromoform | 7.5 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Arsenic | 4.3 µg/L 43% of the EPA limit 10 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Bromate | 3.445 µg/L 34% of the EPA limit 10 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 3.13 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.985 µg/L 50% of the EPA limit 6 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 2/2 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Carbon Tetrachloride | 0.8000 µg/L 16% of the EPA limit 5 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019 | 1/2 | SYR4 |
| Antimony, Total | 0.7000 µg/L 12% of the EPA limit 6 µg/L Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.1900 µg/L 6.3% of the EPA limit 3 µg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2019
Highest in the ZIP: 0.2950 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2019 | 2/2 | SYR4 |
| PFOA | 0.0130 µg/L No EPA limit set Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 1/2 | UCMR-5 |
| PFOS | 0.0111 µg/L No EPA limit set Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0069 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2024
Highest in the ZIP: 0.0093 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 2/2 | UCMR-5 |
| Pfhxa | 0.0050 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2024
Highest in the ZIP: 0.0081 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 2/2 | UCMR-5 |
| Pfba | 0.0070 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2024 | 2/2 | UCMR-5 |
| PFBS | 0.0053 µg/L No EPA limit set Main supplier: PA AMERICAN NORRISTOWN · 88,885 people · 2024
Highest in the ZIP: 0.0064 µg/L — NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 2/2 | UCMR-5 |
| Pfhpa | 0.0058 µg/L No EPA limit set Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 1/2 | UCMR-5 |
| PFNA | 0.0056 µg/L No EPA limit set Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 1/2 | UCMR-5 |
| PFHXS | 0.0037 µg/L No EPA limit set Highest in the ZIP: NORTH WALES WATER AUTHORITY · 72,496 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: PA AMERICAN NORRISTOWN · 88,885 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 19477
| Supplier | State | Population served |
|---|---|---|
| PA AMERICAN NORRISTOWN | PA | 88,885 |
| NORTH WALES WATER AUTHORITY | PA | 72,496 |
Frequently asked questions about ZIP 19477 tap water
Is the tap water in ZIP 19477 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 19477. 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 19477?
2 public water suppliers report EPA drinking-water monitoring for ZIP 19477. Each is listed above with its population served.
What contaminants are in ZIP 19477's water?
EPA monitoring detected Nitrate, Copper, Barium, Fluoride, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.