What was found in ZIP 19543
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 | 5042.5 µg/L 50% of the EPA limit 10000 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019
Highest in the ZIP: 8380 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2019 | 2/2 | SYR4 |
| Copper | 350.75 µg/L 27% of the EPA limit 1300 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019
Highest in the ZIP: 522.75 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2019 | 2/2 | SYR4 |
| Barium | 475 µg/L 24% of the EPA limit 2000 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| TTHM | 91.38 µg/L 114% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Lead | 24.3 µg/L 162% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019
Highest in the ZIP: 74.8 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2019 | 2/2 | SYR4 |
| Chloroform | 60.84 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 48.035 µg/L 80% of the EPA limit 60 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Lithium | 45.2 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024 | 1/2 | UCMR-5 |
| Trichloroacetic Acid | 33.085 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 24.9 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Xylenes, Total | 21.9 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 16.325 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 13.75 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 3.58271 µg/L 12% of the EPA limit 30 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2018
Highest in the ZIP: 12.0452 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2018 | 2/2 | SYR4 |
| Ethylbenzene | 3.3 µg/L 0.5% of the EPA limit 700 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Bromoform | 3.205 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.42 µg/L 40% of the EPA limit 6 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.93 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 2/2 | SYR4 |
| Thallium, Total | 1.9 µg/L 95% of the EPA limit 2 µg/L Highest in the ZIP: CAERNARVON TWP AUTH · 4,245 people · 2018 | 1/2 | SYR4 |
| Mercury | 0.8750 µg/L 44% of the EPA limit 2 µg/L Highest in the ZIP: CAERNARVON TWP AUTH · 4,245 people · 2018 | 1/2 | SYR4 |
| Antimony, Total | 0.5950 µg/L 9.9% of the EPA limit 6 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Tetrachloroethylene | 0.5950 µg/L 12% of the EPA limit 5 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Dichloromethane | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Atrazine | 0.2000 µg/L 6.7% of the EPA limit 3 µg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2019 | 1/2 | SYR4 |
| Pfhxa | 0.0057 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0920 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| Pfpea | 0.0062 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0754 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| Pfba | 0.0054 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0562 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| PFOA | 0.0091 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0558 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| PFBS | 0.0070 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0290 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| Pfhpa | 0.0034 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024
Highest in the ZIP: 0.0231 µg/L — CAERNARVON TWP AUTH · 4,245 people · 2025 | 2/2 | UCMR-5 |
| PFOS | 0.0107 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024 | 1/2 | UCMR-5 |
| PFHXS | 0.0050 µg/L No EPA limit set Main supplier: PA AMERICAN ROYERSFORD · 49,508 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: PA AMERICAN ROYERSFORD · 49,508 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 19543
| Supplier | State | Population served |
|---|---|---|
| PA AMERICAN ROYERSFORD | PA | 49,508 |
| CAERNARVON TWP AUTH | PA | 4,245 |
Frequently asked questions about ZIP 19543 tap water
Is the tap water in ZIP 19543 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 19543. 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 19543?
2 public water suppliers report EPA drinking-water monitoring for ZIP 19543. Each is listed above with its population served.
What contaminants are in ZIP 19543's water?
EPA monitoring detected Nitrate, Copper, Barium, TTHM, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.