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Counties → District of Columbia

District of Columbia County, District of Columbia

Water Systems
5
Population Served
667,575
Total Violations
263
72 health-based
PFAS Detected
3
of 3 tested

Violation Analysis

100.0%
Systems with Violations
52.6
Avg Violations per System
27.4%
Health-Based Violations

Water Source Types

SW
5 systems (100%)

PFAS Contamination

3
Systems Tested
3
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

District of Columbia District of Columbia water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (5)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
D.C. Water and Sewer Authority 632,323 82 Detected
Joint Base Anacostia - Bolling 19,312 81 Detected
Naval Station Washington - Wny 15,690 62 Detected
Naval Observatory 250 25 -
Washington Aqueduct Division. 0 13 -

Drinking Water Guides

Frequently Asked Questions

How many water violations are in District of Columbia County? ▼
District of Columbia County has 263 total drinking water violations across 5 water systems, of which 72 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from District of Columbia County systems? ▼
Water systems in District of Columbia County serve approximately 667,575 people through 5 public water systems.
Has PFAS been detected in District of Columbia County water? ▼
Of 3 water systems tested for PFAS in District of Columbia County, 3 had PFAS detected (100.0% detection rate).
What types of water sources supply District of Columbia County? ▼
Water systems in District of Columbia County use SW (5 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 27.4% of District of Columbia County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.