What was found in ZIP 20090
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 | 1/1 | SYR4 |
| Chloroform | 47.95 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/1 | 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 | 1/1 | SYR4 |
| Bromodichloromethane | 20.99 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/1 | SYR4 |
| Monobromoacetic Acid | 8.1 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/1 | SYR4 |
| Dibromochloromethane | 5.765 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.5 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2016 | 1/1 | SYR4 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set Main supplier: D.C. WATER AND SEWER AUTHORITY · 632,323 people · 2024 | 1/1 | 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 | 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 20090
| Supplier | State | Population served |
|---|---|---|
| D.C. WATER AND SEWER AUTHORITY | DC | 632,323 |
Frequently asked questions about ZIP 20090 tap water
Is the tap water in ZIP 20090 safe to drink?
EPA testing detected 10 contaminants across the water suppliers serving ZIP 20090. 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 20090?
1 public water supplier report EPA drinking-water monitoring for ZIP 20090. Each is listed above with its population served.
What contaminants are in ZIP 20090's water?
EPA monitoring detected TTHM, Chloroform, Total Haloacetic Acids (HAA5), Bromodichloromethane, Monobromoacetic Acid, and others across this ZIP's suppliers. The full list with levels and sources is above.