What was found in ZIP 21702
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 | 3345 µg/L 33% of the EPA limit 10000 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2017 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2630 µg/L 26% of the EPA limit 10000 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Fluoride | 880 µg/L 22% of the EPA limit 4000 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| TTHM | 101.125 µg/L 126% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 82.17 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 79.52 µg/L 133% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 48.78 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2015 | 2/2 | SYR4 |
| Trichloroacetic Acid | 41.11 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2015 | 2/2 | SYR4 |
| Barium | 40.75 µg/L 2% of the EPA limit 2000 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 13.56 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2019
Highest in the ZIP: 13.832 µg/L — FORT DETRICK · 7,900 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.08 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2015
Highest in the ZIP: 8.23 µg/L — FORT DETRICK · 7,900 people · 2015 | 2/2 | SYR4 |
| Dibromochloromethane | 4.32 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4 pCi/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2014 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.08 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2015 | 1/2 | SYR4 |
| Monobromoacetic Acid | 2.05 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2015 | 1/2 | SYR4 |
| Bromoform | 0.8940 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2018
Highest in the ZIP: 2 µg/L — FORT DETRICK · 7,900 people · 2018 | 2/2 | SYR4 |
| Atrazine | 1.4915 µg/L 50% of the EPA limit 3 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 1/2 | SYR4 |
| Dalapon | 1.18 µg/L 0.6% of the EPA limit 200 µg/L Highest in the ZIP: FORT DETRICK · 7,900 people · 2019 | 1/2 | SYR4 |
| Simazine | 0.9415 µg/L 24% of the EPA limit 4 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019 | 2/2 | SYR4 |
| Hexachlorocyclopentadiene | 0.2695 µg/L 0.5% of the EPA limit 50 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2019
Highest in the ZIP: 0.3000 µg/L — FORT DETRICK · 7,900 people · 2019 | 2/2 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0100 µg/L 5% of the EPA limit 0.2000 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2018 | 2/2 | SYR4 |
| Ethylene Dibromide | 0.0100 µg/L 20% of the EPA limit 0.0500 µg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2018 | 2/2 | SYR4 |
| Pfpea | 0.0031 µg/L No EPA limit set Main supplier: CITY OF FREDERICK · 54,000 people · 2024
Highest in the ZIP: 0.0039 µg/L — FORT DETRICK · 7,900 people · 2025 | 2/2 | UCMR-5 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L Main supplier: CITY OF FREDERICK · 54,000 people · 2021 | 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 21702
| Supplier | State | Population served |
|---|---|---|
| CITY OF FREDERICK | MD | 54,000 |
| FORT DETRICK | MD | 7,900 |
Frequently asked questions about ZIP 21702 tap water
Is the tap water in ZIP 21702 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 21702. 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 21702?
2 public water suppliers report EPA drinking-water monitoring for ZIP 21702. Each is listed above with its population served.
What contaminants are in ZIP 21702's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.