What was found in ZIP 19363
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 | 8390 µg/L 84% of the EPA limit 10000 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019
Highest in the ZIP: 8792.5 µg/L — OXFORD BOROUGH · 5,280 people · 2019 | 2/2 | SYR4 |
| Fluoride | 772.35 µg/L 19% of the EPA limit 4000 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Copper | 312.5 µg/L 24% of the EPA limit 1300 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| TTHM | 75.9 µg/L 95% of the EPA limit 80 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Chloroform | 68.435 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 59.93 µg/L 100% of the EPA limit 60 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 31.425 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019
Highest in the ZIP: 34.95 µg/L — OXFORD BOROUGH · 5,280 people · 2019 | 2/2 | SYR4 |
| Lead | 30.9 µg/L 206% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Barium | 30.65 µg/L 1.5% of the EPA limit 2000 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 27.06 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019
Highest in the ZIP: 28.4 µg/L — OXFORD BOROUGH · 5,280 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 11.845 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.29 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 2.9 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.54 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Bromoform | 1.36 µg/L No EPA limit set Highest in the ZIP: OXFORD BOROUGH · 5,280 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.265 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 2/2 | SYR4 |
| Atrazine | 0.6760 µg/L 23% of the EPA limit 3 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Mercury | 0.5000 µg/L 25% of the EPA limit 2 µg/L Highest in the ZIP: OXFORD BOROUGH · 5,280 people · 2018 | 1/2 | SYR4 |
| 2,4-D | 0.1800 µg/L 0.3% of the EPA limit 70 µg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.0041 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2024
Highest in the ZIP: 0.0066 µg/L — OXFORD BOROUGH · 5,280 people · 2025 | 2/2 | UCMR-5 |
| Pfhxa | 0.0039 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2024
Highest in the ZIP: 0.0059 µg/L — OXFORD BOROUGH · 5,280 people · 2025 | 2/2 | UCMR-5 |
| PFBS | 0.0045 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2024
Highest in the ZIP: 0.0054 µg/L — OXFORD BOROUGH · 5,280 people · 2025 | 2/2 | UCMR-5 |
| Pfba | 0.0053 µg/L No EPA limit set Highest in the ZIP: OXFORD BOROUGH · 5,280 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Main supplier: CHESTER WATER AUTHORITY · 140,437 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0048 mg/L 32% of the EPA limit 0.0150 mg/L Main supplier: CHESTER WATER AUTHORITY · 140,437 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 19363
| Supplier | State | Population served |
|---|---|---|
| CHESTER WATER AUTHORITY | PA | 140,437 |
| OXFORD BOROUGH | PA | 5,280 |
Frequently asked questions about ZIP 19363 tap water
Is the tap water in ZIP 19363 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 19363. 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 19363?
2 public water suppliers report EPA drinking-water monitoring for ZIP 19363. Each is listed above with its population served.
What contaminants are in ZIP 19363's water?
EPA monitoring detected Nitrate, Fluoride, Copper, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.