United States Last reviewed: August 28, 2026

Washington, DC Tap Water Quality

Q: Is tap water safe to drink in Washington, DC?

Yes, it meets all EPA standards. In pre-1986 buildings, use a lead-rated filter or request DC Water's free lead test, since service line replacement is still in progress.

Q: What happened in the DC lead crisis?

A 2001 switch to chloramine disinfection made the water more corrosive, leaching lead from service lines at levels far above the federal action limit until orthophosphate treatment began in 2004. It became the case study behind modern federal lead rules.

Q: When will DC's lead pipes be gone?

DC law requires all lead service lines replaced by 2030, one of the most aggressive deadlines in the country.

1 major system (DC Water)

Community water systems

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City reports on this site

Tracked contaminants

August 28, 2026

Data reviewed

Check a Washington, DC ZIP Code

Overview

The District's water comes from the Potomac River, treated by the Washington Aqueduct (run by the Army Corps of Engineers) and distributed by DC Water. The system meets all federal standards today, but DC carries the legacy of the early-2000s lead crisis, one of the worst in US history, when a disinfectant switch spiked lead citywide.

Since then, orthophosphate corrosion control has kept lead levels low and DC Water is replacing all remaining lead service lines, with a legal mandate to finish by 2030. Disinfection byproducts from the river supply are monitored and within limits.

Common Contaminants in Washington, DC

Lead from service lines

Tens of thousands of lead lines remain mid-replacement; corrosion control keeps measured levels compliant, and free testing is offered

Disinfection byproducts

Chloraminated Potomac water produces DBPs that are monitored and kept within EPA limits

Seasonal taste changes

A spring chlorine switch causes a temporary taste change each year; it is routine maintenance, not a safety issue

Violations & Compliance

DC Water currently meets all federal health-based standards. The 2001-2004 lead crisis reshaped national lead rules; today's compliance rests on orthophosphate treatment and an accelerating line-replacement program.

City Reports for Washington, DC

We haven't published individual city water reports for Washington, DC yet. Use the ZIP lookup for a statewide assessment, and check your utility's annual Consumer Confidence Report for local detail.

Frequently Asked Questions

Is tap water safe to drink in Washington, DC?

What happened in the DC lead crisis?

When will DC's lead pipes be gone?

Sources & References

The safety rating and guidance on this page draw on the following sources. See our full methodology.

•US EPA Safe Drinking Water Act regulations
•EWG Tap Water Database
•The utility's most recent Consumer Confidence Report (CCR)
•WHO Guidelines for Drinking-water Quality

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