What was found in Yardley's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 3650 µg/L 37% of the EPA limit 10000 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Barium | 500 µg/L 25% of the EPA limit 2000 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Copper | 127.5 µg/L 9.8% of the EPA limit 1300 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| TTHM | 85 µg/L 106% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Chloroform | 74.48 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 64.08 µg/L 107% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 40.95 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 24.85 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Lead | 12.6 µg/L 84% of the EPA limit 15 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 11.59 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 4.75534 µg/L 16% of the EPA limit 30 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2017 | 1/1 | SYR4 |
| Monochloroacetic Acid | 2.98 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 2.1 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.7850 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| Hexachlorocyclopentadiene | 0.1000 µg/L 0.2% of the EPA limit 50 µg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/1 | SYR4 |
| PFOA | 0.0097 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| PFOS | 0.0061 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| Pfba | 0.0054 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| Pfpea | 0.0051 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0048 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0048 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| Pfhpa | 0.0030 µg/L No EPA limit set Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2025 | 1/1 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Yardley
| Supplier | Population served |
|---|---|
| PA AMERICAN WATER CO YARDLEY | 33,171 |
Frequently asked questions about Yardley tap water
Is Yardley tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Yardley. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Yardley?
1 public water supplier report drinking-water monitoring for Yardley, Pennsylvania to the EPA. Each is listed above with its population served.
What contaminants are in Yardley's water?
The contaminants EPA monitoring detected in Yardley include Nitrate, Barium, Copper, TTHM, Chloroform. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.