What was found in ZIP 17201
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 | 4020 µg/L 40% of the EPA limit 10000 µg/L Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 3/4 | SYR4 |
| Fluoride | 1163.5 µg/L 29% of the EPA limit 4000 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 800.432 µg/L No EPA limit set Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 2/4 | SYR4 |
| Copper | 136 µg/L 10% of the EPA limit 1300 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 635.3 µg/L — GUILFORD WATER AUTH · 28,135 people · 2019 | 4/4 | SYR4 |
| Nitrite | 270 µg/L 27% of the EPA limit 1000 µg/L Highest in the ZIP: GUILFORD WATER AUTH · 28,135 people · 2019 | 1/4 | SYR4 |
| Lead | 28.705 µg/L 191% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 86.75 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| TTHM | 67.54 µg/L 84% of the EPA limit 80 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 71.12 µg/L — FRANKLIN SYSTEM YORK WATER · 4,400 people · 2019 | 4/4 | SYR4 |
| Barium | 47.03 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 65 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| Chloroform | 64.09 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 64.24 µg/L — FRANKLIN SYSTEM YORK WATER · 4,400 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 47.91 µg/L 80% of the EPA limit 60 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 59.945 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 11.405 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 34.3 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 6.222 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 32 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 32 µg/L No EPA limit set Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 2/4 | SYR4 |
| Lithium | 19 µg/L No EPA limit set Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2025 | 1/4 | UCMR-5 |
| Selenium | 11 µg/L 22% of the EPA limit 50 µg/L Highest in the ZIP: GUILFORD WATER AUTH · 28,135 people · 2018 | 2/4 | SYR4 |
| Dibromoacetic Acid | 9.13 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 5.14 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 8.9 µg/L — BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 4/4 | SYR4 |
| Dibromochloromethane | 0.7795 µg/L No EPA limit set Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019
Highest in the ZIP: 4.781 µg/L — GUILFORD WATER AUTH · 28,135 people · 2019 | 4/4 | SYR4 |
| Arsenic | 3.1 µg/L 31% of the EPA limit 10 µg/L Highest in the ZIP: GUILFORD WATER AUTH · 28,135 people · 2018 | 1/4 | SYR4 |
| Bromoform | 3 µg/L No EPA limit set Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 1/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.6 µg/L 27% of the EPA limit 6 µg/L Highest in the ZIP: GUILFORD WATER AUTH · 28,135 people · 2019 | 1/4 | SYR4 |
| Xylenes, Total | 1.4515 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2019 | 1/4 | SYR4 |
| Mercury | 1.2 µg/L 60% of the EPA limit 2 µg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 people · 2019 | 1/4 | SYR4 |
| 6:2 Fts | 0.0097 µg/L No EPA limit set Highest in the ZIP: BEAR VALLEY JOINT AUTH · 12,589 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.0047 mg/L 31% of the EPA limit 0.0150 mg/L Main supplier: CHAMBERSBURG BORO WATER SYS · 31,048 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 17201
| Supplier | State | Population served |
|---|---|---|
| CHAMBERSBURG BORO WATER SYS | PA | 31,048 |
| GUILFORD WATER AUTH | PA | 28,135 |
| BEAR VALLEY JOINT AUTH | PA | 12,589 |
| FRANKLIN SYSTEM YORK WATER | PA | 4,400 |
Frequently asked questions about ZIP 17201 tap water
Is the tap water in ZIP 17201 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 17201. 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 17201?
4 public water suppliers report EPA drinking-water monitoring for ZIP 17201. Each is listed above with its population served.
What contaminants are in ZIP 17201's water?
EPA monitoring detected Nitrate, Fluoride, Monochloroacetic Acid, Copper, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.