Chlorine Provides your Water with Protection from Contamination

The drinking water delivered by DC Water contains chloramines, chemical compounds made from ammonia and chlorine. Chloramine is added to drinking water to kill bacteria and microorganisms in the treatment plant and the distribution system.

As part of the Total Coliform Rule, the EPA requires DC Water to collect over 200 samples a month and test for total chlorine concentration. The EPA requires detection of chlorine in each sample, or greater than 0.0 mg/L total chlorine. The EPA also requires water systems to maintain the annual average at or below 4.0 mg/L. The graph below displays the average concentration of those samples over the past year.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

West Potomac Park Drive SW Intersection
DC Water adds new road through West Potomac Park, improving access during Potomac River Tunnel construction

(Washington, DC) – DC Water today announces the opening of West Potomac Park Drive SW, a new road constructed as part of the Potomac River Tunnel (

Latest Blog Post
Photo of Great Falls of the Potomac River with fast moving rapids going over the falls
The Critical Need for a More Resilient Water Source and Protecting the One We Have
Source Water Protection Week highlights the case for second water source.
Upcoming Meeting
Date
December 17, 2024
Time
Tuesday, 4:00 PM

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