What was found in ZIP 18940
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 | 4155 µg/L 42% of the EPA limit 10000 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018 | 3/3 | SYR4 |
| Fluoride | 599.6 µg/L 15% of the EPA limit 4000 µg/L Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 1/3 | SYR4 |
| Barium | 427.5 µg/L 21% of the EPA limit 2000 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018
Highest in the ZIP: 500 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Copper | 315.85 µg/L 24% of the EPA limit 1300 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 420.5 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 3/3 | SYR4 |
| TTHM | 58.6 µg/L 73% of the EPA limit 80 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 85 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Chloroform | 35.75 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 74.48 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35.9 µg/L 60% of the EPA limit 60 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 64.08 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 6.255 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 40.95 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 7.925 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 24.85 µg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 3/3 | SYR4 |
| Lithium | 19.2 µg/L No EPA limit set Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 1/3 | UCMR-5 |
| Bromodichloromethane | 16 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019 | 3/3 | SYR4 |
| Lead | 2.75 µg/L 18% of the EPA limit 15 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 13.9 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 8.59834 µg/L 29% of the EPA limit 30 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2017 | 3/3 | SYR4 |
| Dibromochloromethane | 6.517 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019 | 3/3 | SYR4 |
| Chromium | 6.3 µg/L 6.3% of the EPA limit 100 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018 | 2/3 | SYR4 |
| Selenium | 2.36 µg/L 4.7% of the EPA limit 50 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018
Highest in the ZIP: 4.35 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 2/3 | SYR4 |
| Monochloroacetic Acid | 4.18 µg/L No EPA limit set Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 2/3 | SYR4 |
| Arsenic | 1.76 µg/L 18% of the EPA limit 10 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018
Highest in the ZIP: 3.5 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 3/3 | SYR4 |
| Tetrachloroethylene | 1.5505 µg/L 31% of the EPA limit 5 µg/L Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019
Highest in the ZIP: 1.345 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2019 | 2/3 | SYR4 |
| Bromoform | 1.254 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2019 | 3/3 | SYR4 |
| Antimony, Total | 0.2680 µg/L 4.5% of the EPA limit 6 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018 | 2/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.1000 µg/L 0.2% of the EPA limit 50 µg/L Highest in the ZIP: PA AMERICAN WATER CO YARDLEY · 33,171 people · 2019 | 1/3 | SYR4 |
| Cadmium | 0.0700 µg/L 1.4% of the EPA limit 5 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018 | 2/3 | SYR4 |
| Mercury | 0.0250 µg/L 1.3% of the EPA limit 2 µg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2018
Highest in the ZIP: 0.0538 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2018 | 2/3 | SYR4 |
| PFOS | 0.0079 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0230 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| Pfpea | 0.0056 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0206 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| PFOA | 0.0123 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0196 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| Pfhxa | 0.0059 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0175 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| PFBS | 0.0070 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0149 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| Pfhpa | 0.0040 µg/L No EPA limit set Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2024
Highest in the ZIP: 0.0086 µg/L — NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 3/3 | UCMR-5 |
| Pfba | 0.0081 µg/L No EPA limit set Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 2/3 | UCMR-5 |
| PFHXS | 0.0055 µg/L No EPA limit set Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 1/3 | UCMR-5 |
| PFNA | 0.0043 µg/L No EPA limit set Highest in the ZIP: NORTHAMPTON BUCKS CO MUN AUTH · 36,750 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: NEWTOWN ARTESIAN WATER CO · 38,500 people · 2025
Highest in the ZIP: 0.0010 mg/L — PA AMERICAN WATER CO YARDLEY · 33,171 people · 2025 | 3/3 | 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 18940
| Supplier | State | Population served |
|---|---|---|
| NEWTOWN ARTESIAN WATER CO | PA | 38,500 |
| NORTHAMPTON BUCKS CO MUN AUTH | PA | 36,750 |
| PA AMERICAN WATER CO YARDLEY | PA | 33,171 |
Frequently asked questions about ZIP 18940 tap water
Is the tap water in ZIP 18940 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 18940. 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 18940?
3 public water suppliers report EPA drinking-water monitoring for ZIP 18940. Each is listed above with its population served.
What contaminants are in ZIP 18940's water?
EPA monitoring detected Nitrate, Fluoride, Barium, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.