What was found in ZIP 22603
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-Nitrite | 2939.5 µg/L 29% of the EPA limit 10000 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1142.5 µg/L 29% of the EPA limit 4000 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019 | 2/2 | SYR4 |
| Copper | 194 µg/L 15% of the EPA limit 1300 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 327 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| TTHM | 43 µg/L 54% of the EPA limit 80 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 81.65 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Chloroform | 32 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 69.25 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Barium | 67.25 µg/L 3.4% of the EPA limit 2000 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019 | 2/2 | SYR4 |
| Lead | 22.2 µg/L 148% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 64.9 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30 µg/L 50% of the EPA limit 60 µg/L Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 62.3 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 18 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 33 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 12 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 26 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 9.085 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 11.25 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 2.4 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019
Highest in the ZIP: 4.17 µg/L — WINCHESTER, CITY OF · 28,248 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 2.89 pCi/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2014
Highest in the ZIP: 4.09 pCi/L — WINCHESTER, CITY OF · 28,248 people · 2018 | 2/2 | SYR4 |
| Dibromochloromethane | 3.4 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.6000 pCi/L 12% of the EPA limit 5 pCi/L Main supplier: FREDERICK WATER · 46,206 people · 2014 | 2/2 | SYR4 |
| PFBS | 0.0069 µg/L No EPA limit set Main supplier: FREDERICK WATER · 46,206 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: FREDERICK WATER · 46,206 people · 2025
Highest in the ZIP: 0.0027 mg/L — WINCHESTER, CITY OF · 28,248 people · 2024 | 2/2 | 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 22603
| Supplier | State | Population served |
|---|---|---|
| FREDERICK WATER | VA | 46,206 |
| WINCHESTER, CITY OF | VA | 28,248 |
Frequently asked questions about ZIP 22603 tap water
Is the tap water in ZIP 22603 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 22603. 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 22603?
2 public water suppliers report EPA drinking-water monitoring for ZIP 22603. Each is listed above with its population served.
What contaminants are in ZIP 22603's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Copper, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.