Water Quality in 20001 — Washington, DC
EPA data for D.C. WATER AND SEWER AUTHORITY
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 20001 in Washington, District of Columbia is served by D.C. WATER AND SEWER AUTHORITY (EPA ID: DC0000002). This system provides water to approximately 632,323 people from surface water sources.
There are 4 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| September 18, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| September 1, 2025 | E. coli | Health-based | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| April 1, 2025 | Haloacetic Acids (HAA5) | Health-based | Unresolved |
| February 11, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| September 23, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| August 19, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| August 19, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| July 31, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| April 15, 2024 | Lead and Copper Rule | Monitoring | Unresolved |
| April 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
| April 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Resolved |
| April 1, 2024 | Haloacetic Acids (HAA5) | Monitoring | Resolved |
| April 1, 2024 | Haloacetic Acids (HAA5) | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | Consumer Confidence Report Rule | Monitoring | Resolved |
| November 1, 2023 | E. coli | Monitoring | Resolved |
| November 1, 2023 | E. coli | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 21 | Yes |
| E. coli | Microbiological | 16 | Yes |
| Surface Water Treatment Rule | Treatment Technique | 9 | No |
| Lead and Copper Rule | Treatment Technique | 5 | No |
| Stage 1 DBP Rule | Treatment Technique | 4 | No |
| Lead | Inorganic | 4 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 4 | Yes |
| Fecal Coliform | Microbiological | 3 | No |
| Copper | Inorganic | 2 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | No |
Need help with your water quality?
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Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| D.C. WATER AND SEWER AUTHORITY | DC0000002 | 632,323 | Surface water |
| JOINT BASE ANACOSTIA - BOLLING | DC0000004 | 19,312 | Surface water |
| NAVAL STATION WASHINGTON - WNY | DC0000003 | 15,690 | Surface water |
| WASHINGTON AQUEDUCT DIVISION. | DC0000001 | 0 | Surface water |
What You Can Do
- Request your water system’s Consumer Confidence Report (CCR) — Your utility is required to publish this annually
- Consider a home water test — Independent testing can reveal issues in your specific plumbing
- Install a certified water filter — NSF-certified filters can address specific contaminants
- Contact your water provider — Ask about current treatment and any ongoing remediation
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Nearby Water Quality Reports
- 22201 (Arlington, VA) — 4 mi — 3 violations
- 20810 (Bethesda, MD) — 7 mi
- 22301 (Alexandria, VA) — 7 mi
- 20901 (Silver Spring, MD) — 7 mi
- 22180 (Vienna, VA) — 13 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for D.C. WATER AND SEWER AUTHORITY (DC0000002) on EPA.gov.
Frequently Asked Questions
Is the tap water in 20001 safe to drink?
Washington’s water system has recorded 9 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
Where does 20001’s water come from?
The primary water source for this area is surface water. D.C. WATER AND SEWER AUTHORITY serves approximately 632,323 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 20001 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 20001. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 20001?
Radon zone data is not available for ZIP code 20001. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.