What was found in ZIP 18901
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 | 4340 µg/L 43% of the EPA limit 10000 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019
Highest in the ZIP: 5200 µg/L — DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 4/4 | SYR4 |
| Copper | 966.4 µg/L 74% of the EPA limit 1300 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019
Highest in the ZIP: 1346 µg/L — DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 4/4 | SYR4 |
| Barium | 393.6 µg/L 20% of the EPA limit 2000 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2018
Highest in the ZIP: 718.4 µg/L — DOYLESTOWN BORO WATER DEPT · 8,700 people · 2018 | 4/4 | SYR4 |
| Fluoride | 123.7 µg/L 3.1% of the EPA limit 4000 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2018
Highest in the ZIP: 230 µg/L — AQUA PA CHALFONT · 5,900 people · 2018 | 3/4 | SYR4 |
| TTHM | 52.6 µg/L 66% of the EPA limit 80 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 4/4 | SYR4 |
| Chloroform | 39.9 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 4/4 | SYR4 |
| Lithium | 23.6 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2025 | 3/4 | UCMR-5 |
| Lead | 22.625 µg/L 151% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019
Highest in the ZIP: 23 µg/L — DTMA MAIN SYSTEM · 8,655 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 18.25 µg/L 30% of the EPA limit 60 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 13.5 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 10.685 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 8.81 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 2/4 | SYR4 |
| Arsenic | 5.57 µg/L 56% of the EPA limit 10 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2018
Highest in the ZIP: 7.025 µg/L — DTMA MAIN SYSTEM · 8,655 people · 2018 | 4/4 | SYR4 |
| Selenium | 6.9 µg/L 14% of the EPA limit 50 µg/L Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2018 | 3/4 | SYR4 |
| Combined Uranium | 5.28354 µg/L 18% of the EPA limit 30 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2017
Highest in the ZIP: 6.16473 µg/L — DTMA MAIN SYSTEM · 8,655 people · 2017 | 4/4 | SYR4 |
| Chromium | 2.45 µg/L 2.5% of the EPA limit 100 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2018
Highest in the ZIP: 5.8 µg/L — AQUA PA CHALFONT · 5,900 people · 2018 | 4/4 | SYR4 |
| Dibromochloromethane | 5.603 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 4/4 | SYR4 |
| 1,1-Dichloroethylene | 4.18 µg/L 60% of the EPA limit 7 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 3/4 | SYR4 |
| Xylenes, Total | 4.155 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2019 | 1/4 | SYR4 |
| cis-1,2-Dichloroethylene | 4.01 µg/L 5.7% of the EPA limit 70 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 2/4 | SYR4 |
| Tetrachloroethylene | 0.9204 µg/L 18% of the EPA limit 5 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019
Highest in the ZIP: 3.625 µg/L — AQUA PA CHALFONT · 5,900 people · 2019 | 4/4 | SYR4 |
| Bromoform | 1.988 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019
Highest in the ZIP: 3.09 µg/L — DTMA MAIN SYSTEM · 8,655 people · 2019 | 4/4 | SYR4 |
| Toluene | 2.29 µg/L 0.2% of the EPA limit 1000 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 1/4 | SYR4 |
| Carbon Tetrachloride | 1.88 µg/L 38% of the EPA limit 5 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 1.5855 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 2/4 | SYR4 |
| Trichloroethylene | 1.2035 µg/L 24% of the EPA limit 5 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 2/4 | SYR4 |
| Ethylbenzene | 1.09 µg/L 0.2% of the EPA limit 700 µg/L Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2019 | 1/4 | SYR4 |
| 1,1,1-Trichloroethane | 0.8620 µg/L 0.4% of the EPA limit 200 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 1/4 | SYR4 |
| Styrene | 0.7800 µg/L 0.8% of the EPA limit 100 µg/L Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2019 | 1/4 | SYR4 |
| Antimony, Total | 0.7000 µg/L 12% of the EPA limit 6 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2018 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Adipate | 0.6000 µg/L 0.2% of the EPA limit 400 µg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.6000 µg/L 10% of the EPA limit 6 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2019 | 1/4 | SYR4 |
| Beryllium, Total | 0.0700 µg/L 1.8% of the EPA limit 4 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2018 | 1/4 | SYR4 |
| Mercury | 0.0320 µg/L 1.6% of the EPA limit 2 µg/L Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2018 | 1/4 | SYR4 |
| PFOS | 0.0190 µg/L No EPA limit set Highest in the ZIP: AQUA PA CHALFONT · 5,900 people · 2025 | 3/4 | UCMR-5 |
| Pfhxa | 0.0180 µg/L No EPA limit set Highest in the ZIP: AQUA PA CHALFONT · 5,900 people · 2025 | 3/4 | UCMR-5 |
| Pfpea | 0.0034 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2025
Highest in the ZIP: 0.0180 µg/L — AQUA PA CHALFONT · 5,900 people · 2025 | 4/4 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2025
Highest in the ZIP: 0.0146 µg/L — DOYLESTOWN BORO WATER DEPT · 8,700 people · 2025 | 4/4 | UCMR-5 |
| PFBS | 0.0040 µg/L No EPA limit set Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2025
Highest in the ZIP: 0.0098 µg/L — DTMA MAIN SYSTEM · 8,655 people · 2025 | 4/4 | UCMR-5 |
| Pfba | 0.0090 µg/L No EPA limit set Highest in the ZIP: AQUA PA CHALFONT · 5,900 people · 2025 | 3/4 | UCMR-5 |
| PFNA | 0.0074 µg/L No EPA limit set Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2025 | 2/4 | UCMR-5 |
| Pfhpa | 0.0072 µg/L No EPA limit set Highest in the ZIP: DTMA MAIN SYSTEM · 8,655 people · 2025 | 3/4 | UCMR-5 |
| PFHXS | 0.0064 µg/L No EPA limit set Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2025 | 2/4 | UCMR-5 |
| Pfuna | 0.0030 µg/L No EPA limit set Highest in the ZIP: DOYLESTOWN BORO WATER DEPT · 8,700 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.00050 mg/L 3.3% of the EPA limit 0.0150 mg/L Main supplier: NORTH PENN WATER AUTHORITY · 91,941 people · 2025 | 4/4 | 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 18901
| Supplier | State | Population served |
|---|---|---|
| NORTH PENN WATER AUTHORITY | PA | 91,941 |
| DOYLESTOWN BORO WATER DEPT | PA | 8,700 |
| DTMA MAIN SYSTEM | PA | 8,655 |
| AQUA PA CHALFONT | PA | 5,900 |
Frequently asked questions about ZIP 18901 tap water
Is the tap water in ZIP 18901 safe to drink?
EPA testing detected 45 contaminants across the water suppliers serving ZIP 18901. 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 18901?
4 public water suppliers report EPA drinking-water monitoring for ZIP 18901. Each is listed above with its population served.
What contaminants are in ZIP 18901'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.