What was found in ZIP 18974
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 | 4700 µg/L 47% of the EPA limit 10000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 3/5 | SYR4 |
| Copper | 458 µg/L 35% of the EPA limit 1300 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 651 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 5/5 | SYR4 |
| Fluoride | 588 µg/L 15% of the EPA limit 4000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 599.6 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 3/5 | SYR4 |
| Chlorite | 590 µg/L 59% of the EPA limit 1000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Barium | 183.2 µg/L 9.2% of the EPA limit 2000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 496 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2018 | 3/5 | SYR4 |
| Tetrachloroethylene | 3.3 µg/L 66% of the EPA limit 5 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 144.035 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 3/5 | SYR4 |
| TTHM | 78.56 µg/L 98% of the EPA limit 80 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 5/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 55.28 µg/L 92% of the EPA limit 60 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 61.78 µg/L — BCWSA MAIN LOWER SOUTH · 52,621 people · 2019 | 5/5 | SYR4 |
| Chloroform | 47.3 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 58.885 µg/L — BCWSA MAIN LOWER SOUTH · 52,621 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 25.71 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 28.23 µg/L — BCWSA MAIN LOWER SOUTH · 52,621 people · 2019 | 5/5 | SYR4 |
| Dichloroacetic Acid | 22.8 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 5/5 | SYR4 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Lithium | 15.7 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 19.2 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 2/5 | UCMR-5 |
| Bromodichloromethane | 17.5 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 5/5 | SYR4 |
| Lead | 15.1 µg/L 101% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 15.35 µg/L — BCWSA MAIN LOWER SOUTH · 52,621 people · 2019 | 5/5 | SYR4 |
| cis-1,2-Dichloroethylene | 0.9850 µg/L 1.4% of the EPA limit 70 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 15.2 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 2/5 | SYR4 |
| Combined Uranium | 12.9779 µg/L 43% of the EPA limit 30 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2017
Highest in the ZIP: 14.9119 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2017 | 3/5 | SYR4 |
| Trichloroethylene | 2.225 µg/L 45% of the EPA limit 5 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 14.795 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 2/5 | SYR4 |
| Chromium | 8.46 µg/L 8.5% of the EPA limit 100 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 3/5 | SYR4 |
| Arsenic | 1.3 µg/L 13% of the EPA limit 10 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 8.085 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2018 | 3/5 | SYR4 |
| Dibromochloromethane | 6.105 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 7.15 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 5/5 | SYR4 |
| 1,1-Dichloroethylene | 6.5 µg/L 93% of the EPA limit 7 µg/L Highest in the ZIP: WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 1/5 | SYR4 |
| Selenium | 2.315 µg/L 4.6% of the EPA limit 50 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 4.35 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 2/5 | SYR4 |
| Monochloroacetic Acid | 3.595 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 4.18 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 2/5 | SYR4 |
| Antimony, Total | 4 µg/L 67% of the EPA limit 6 µg/L Highest in the ZIP: WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2018 | 2/5 | SYR4 |
| Xylenes, Total | 2.795 µg/L 0% of the EPA limit 10000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Bromoform | 1.075 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 2.45 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 4/5 | SYR4 |
| Dibromoacetic Acid | 2.2 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 5/5 | SYR4 |
| Monobromoacetic Acid | 1.71 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| 2,4-D | 1.5 µg/L 2.1% of the EPA limit 70 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.474 µg/L 25% of the EPA limit 6 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| 1,1,1-Trichloroethane | 0.5000 µg/L 0.3% of the EPA limit 200 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019
Highest in the ZIP: 1.18 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2019 | 2/5 | SYR4 |
| Toluene | 0.7000 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Atrazine | 0.2800 µg/L 9.3% of the EPA limit 3 µg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2019 | 1/5 | SYR4 |
| Mercury | 0.0538 µg/L 2.7% of the EPA limit 2 µg/L Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 1/5 | SYR4 |
| Cadmium | 0.0400 µg/L 0.8% of the EPA limit 5 µg/L Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 1/5 | SYR4 |
| Pfpea | 0.0218 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0285 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2024 | 5/5 | UCMR-5 |
| PFOS | 0.0092 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0230 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 4/5 | UCMR-5 |
| PFOA | 0.0126 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0196 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 4/5 | UCMR-5 |
| Pfhxa | 0.0172 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0175 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 4/5 | UCMR-5 |
| Pfba | 0.0101 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0162 µg/L — WARMINSTER MUNICIPAL AUTHORITY · 36,000 people · 2024 | 5/5 | UCMR-5 |
| PFBS | 0.0095 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0149 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 4/5 | UCMR-5 |
| PFNA | 0.0120 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024 | 2/5 | UCMR-5 |
| Pfhpa | 0.0069 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024
Highest in the ZIP: 0.0086 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 4/5 | UCMR-5 |
| PFHXS | 0.0077 µg/L No EPA limit set Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2024 | 4/5 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: AQUA PA MAIN SYSTEM · 822,600 people · 2025
Highest in the ZIP: 0.0010 mg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 5/5 | 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 18974
| Supplier | State | Population served |
|---|---|---|
| AQUA PA MAIN SYSTEM | PA | 822,600 |
| BCWSA MAIN LOWER SOUTH | PA | 52,621 |
| NORTHAMPTON BUCKS CO MUN AUTH | PA | 36,750 |
| WARMINSTER MUNICIPAL AUTHORITY | PA | 36,000 |
| WARWICK TWP WATER & SEWER AUTH | PA | 14,699 |
Frequently asked questions about ZIP 18974 tap water
Is the tap water in ZIP 18974 safe to drink?
EPA testing detected 46 contaminants across the water suppliers serving ZIP 18974. 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 18974?
5 public water suppliers report EPA drinking-water monitoring for ZIP 18974. Each is listed above with its population served.
What contaminants are in ZIP 18974's water?
EPA monitoring detected Nitrate, Copper, Fluoride, Chlorite, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.