What was found in ZIP 20374
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 |
|---|---|---|---|
| TTHM | 75.39999999999998 µg/L 94% of the EPA limit 80 µg/L Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2017
Highest in the ZIP: 85.63999999999993 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2017 | 2/2 | SYR4 |
| Chloroform | 47.95 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016
Highest in the ZIP: 58 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.48 µg/L 74% of the EPA limit 60 µg/L Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2017
Highest in the ZIP: 51.199999999999974 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2017 | 2/2 | SYR4 |
| Dichloroacetic Acid | 24.5 µg/L No EPA limit set Highest in the ZIP: NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 1/2 | SYR4 |
| Bromodichloromethane | 20.99 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016
Highest in the ZIP: 24.1 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 2/2 | SYR4 |
| Trichloroacetic Acid | 14.3 µg/L No EPA limit set Highest in the ZIP: NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 1/2 | SYR4 |
| Lithium | 12 µg/L No EPA limit set Highest in the ZIP: NAVAL STATION WASHINGTON - WNY · 16,800 people · 2024 | 1/2 | UCMR-5 |
| Monobromoacetic Acid | 8.1 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/2 | SYR4 |
| Dibromochloromethane | 5.765 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016
Highest in the ZIP: 8 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.1 µg/L No EPA limit set Highest in the ZIP: NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 2/2 | SYR4 |
| Bromoform | 0.6800 µg/L No EPA limit set Highest in the ZIP: NAVAL STATION WASHINGTON - WNY · 16,800 people · 2016 | 1/2 | SYR4 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2024
Highest in the ZIP: 0.0038 µg/L — NAVAL STATION WASHINGTON - WNY · 16,800 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2025 | 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 20374
| Supplier | State | Population served |
|---|---|---|
| D.C. WATER AND SEWER AUTHORITY | DC | 632,323 |
| NAVAL STATION WASHINGTON - WNY | DC | 16,800 |
Frequently asked questions about ZIP 20374 tap water
Is the tap water in ZIP 20374 safe to drink?
EPA testing detected 15 contaminants across the water suppliers serving ZIP 20374. 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 20374?
2 public water suppliers report EPA drinking-water monitoring for ZIP 20374. Each is listed above with its population served.
What contaminants are in ZIP 20374's water?
EPA monitoring detected TTHM, Chloroform, Total Haloacetic Acids (HAA5), Dichloroacetic Acid, Bromodichloromethane, and others across this ZIP's suppliers. The full list with levels and sources is above.