Studying Emerging Compounds Protects Our Customers Now and in the Future

Some compounds that are not regulated against by the EPA are currently being studied for their presence in drinking water sources and treated drinking water. These substances are referred to as emerging compounds. Due to advances in testing and monitoring technology, and the possible increase in the sources of these compounds, their detection at levels smaller than ever before is now possible. Scientists monitor the presence of these constituents and continue to investigate the implications on humans and aquatic species in the water supply.

The levels at which most of these compounds are found in water are very small in comparison and their presence does not necessarily pose a risk to humans. However, sensitive subpopulations may be at greater risk from exposure to these compounds and should consult their healthcare providers for additional guidance.

Emerging Compound Testing

DC Water and many other water utilities across the country monitor unregulated compounds as required by EPA's fourth Unregulated Contaminant Monitoring Rule (UCMR4). Arlington County monitored the Washington Aqueduct's treated drinking water for several unregulated compounds from March 2018 through June 2018. DC Water began monitoring at the same site starting in July 2018 through October 2018.

Review DC Water’s drinking water quality report for complete water quality information.

The current compounds being monitored for under UCMR4 include cyanotoxins and haloacetic acids. Emerging compounds also include pharmaceuticals, personal care products and endocrine disrupting chemicals. Endocrine Disrupting Compounds (EDCs) are chemicals that interfere with the action of natural hormones responsible for reproduction, development and behavior. Examples include pesticides, herbicides and natural and synthetic hormones. Pharmaceuticals (P) are prescription and over-the-counter medications for animals and humans. Personal Care Products (PCPs) are common personal hygiene products such as lotions, fragrances and cosmetics. Together these compound are referred to as EDCs and PPCPs.

Reducing the presence of emerging compounds

Although advanced treatment technologies may be useful in minimizing exposure to these chemicals, the most effective approach is to reduce the presence of these contaminants in our source water. DC Water works closely with regional stakeholders through the Potomac Drinking Water Source Protection Partnership to address the problem of emerging compounds in our drinking water supply.

If you have questions or concerns regarding the quality of your water, please contact the Drinking Water Division at 202-612-3440.

Here are the results of our testing for unregulated contaminants. 

Check out frequently asked questions about EPA's Unregulated Contaminant Monitoring Rule. 

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

Upcoming Events