What was found in ZIP 21402
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 |
|---|---|---|---|
| Fluoride | 521 µg/L 13% of the EPA limit 4000 µg/L Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2018 | 1/1 | SYR4 |
| TTHM | 19.58 µg/L 24% of the EPA limit 80 µg/L Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2019 | 1/1 | SYR4 |
| Lithium | 12.1 µg/L No EPA limit set Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2024 | 1/1 | UCMR-5 |
| Chloroform | 4.14 µg/L No EPA limit set Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2016 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.268 µg/L 5.4% of the EPA limit 60 µg/L Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.916 µg/L No EPA limit set Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2016 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.68 µg/L No EPA limit set Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2014 | 1/1 | SYR4 |
| Dibromochloromethane | 1.224 µg/L No EPA limit set Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2016 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: U.S. NAVAL ACADEMY · 8,700 people · 2025 | 1/1 | 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 21402
| Supplier | State | Population served |
|---|---|---|
| U.S. NAVAL ACADEMY | MD | 8,700 |
Frequently asked questions about ZIP 21402 tap water
Is the tap water in ZIP 21402 safe to drink?
EPA testing detected 9 contaminants across the water suppliers serving ZIP 21402. 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 21402?
1 public water supplier report EPA drinking-water monitoring for ZIP 21402. Each is listed above with its population served.
What contaminants are in ZIP 21402's water?
EPA monitoring detected Fluoride, TTHM, Lithium, Chloroform, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.