What was found in ZIP 21401
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 | 695.9 µg/L 17% of the EPA limit 4000 µg/L Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2017 | 2/2 | SYR4 |
| Barium | 17.42 µg/L 0.9% of the EPA limit 2000 µg/L Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2017
Highest in the ZIP: 30.85 µg/L — BROAD CREEK · 26,033 people · 2019 | 2/2 | SYR4 |
| TTHM | 9.6995 µg/L 12% of the EPA limit 80 µg/L Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2019
Highest in the ZIP: 14 µg/L — BROAD CREEK · 26,033 people · 2019 | 2/2 | SYR4 |
| Lithium | 11.4 µg/L No EPA limit set Highest in the ZIP: BROAD CREEK · 26,033 people · 2023 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 1.382 µg/L 2.3% of the EPA limit 60 µg/L Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2019
Highest in the ZIP: 10.52 µg/L — BROAD CREEK · 26,033 people · 2019 | 2/2 | SYR4 |
| Chloroform | 5.346 µg/L No EPA limit set Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2016
Highest in the ZIP: 7.46 µg/L — BROAD CREEK · 26,033 people · 2016 | 2/2 | SYR4 |
| Dichloroacetic Acid | 1.398 µg/L No EPA limit set Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2015
Highest in the ZIP: 4.08 µg/L — BROAD CREEK · 26,033 people · 2015 | 2/2 | SYR4 |
| Bromodichloromethane | 2.73 µg/L No EPA limit set Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2016 | 2/2 | SYR4 |
| Trichloroacetic Acid | 2.2 µg/L No EPA limit set Highest in the ZIP: BROAD CREEK · 26,033 people · 2015 | 1/2 | SYR4 |
| Dibromochloromethane | 1.796 µg/L No EPA limit set Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2016 | 2/2 | SYR4 |
| Monochloroacetic Acid | 1.12 µg/L No EPA limit set Highest in the ZIP: BROAD CREEK · 26,033 people · 2015 | 1/2 | SYR4 |
| Dibromoacetic Acid | 0.6800 µg/L No EPA limit set Highest in the ZIP: BROAD CREEK · 26,033 people · 2015 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.2000 pCi/L 4% of the EPA limit 5 pCi/L Highest in the ZIP: BROAD CREEK · 26,033 people · 2012 | 1/2 | SYR4 |
| Monobromoacetic Acid | 0.2000 µg/L No EPA limit set Highest in the ZIP: BROAD CREEK · 26,033 people · 2015 | 1/2 | SYR4 |
| Lead | 0.0063 mg/L 42% of the EPA limit 0.0150 mg/L Main supplier: CITY OF ANNAPOLIS · 35,000 people · 2023 | 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 21401
| Supplier | State | Population served |
|---|---|---|
| CITY OF ANNAPOLIS | MD | 35,000 |
| BROAD CREEK | MD | 26,033 |
Frequently asked questions about ZIP 21401 tap water
Is the tap water in ZIP 21401 safe to drink?
EPA testing detected 15 contaminants across the water suppliers serving ZIP 21401. 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 21401?
2 public water suppliers report EPA drinking-water monitoring for ZIP 21401. Each is listed above with its population served.
What contaminants are in ZIP 21401's water?
EPA monitoring detected Fluoride, Barium, TTHM, Lithium, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.