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  • Initial site grading for the Quarles Intake Taste and Odor Facility
  • Water main installation Blackjack Project
  • Q1 Water Treatment Plant - Completed 2021

Construction Projects

Current Projects

Quarles Raw Water Intake PAC Project

Seasonal fluctuations can create conditions in natural water sources, such as the Chattahoochee River, that promote naturally occurring algae. These conditions may cause an “earthy” taste and odor in drinking water. While treated water remains safe to drink and use for all purposes, some people can detect the differences in taste and odor even at very low concentrations.

To better control undesirable tastes and odors in our drinking water, Cobb County-Marietta Water Authority is installing a Powdered Activated Carbon (PAC) Treatment System at the Quarles Raw Water Intake Facility on Johnson Ferry Road. PAC is commonly used in water treatment to neutralize taste and odors in the water.

The facility will include a brick equipment building and an approximately 4-story (47 feet) storage silo. The project represents a $4.2 million investment in maintaining high quality drinking water now and into the future. Construction began in January 2021 and currently includes site preparation activities. Currently, it is planned to have the storage silo and equipment delivered in late summer/fall timeframe with the facility fully operational in early 2022.

For more information about the Quarles Raw Water Intake PAC Project, please contact us at 770.514.5300.

Project Flyer

Recently Completed Projects

James E. Quarles Plant 1 Replacement Project

Completed in 2021, the award-winning James E. Quarles Plant I Replacement Project supplies reliable, sustainable, high-quality potable water to over one million for generations to come. Provisions to double the plant capacity are built into the facility ensuring today's infrastructure will sustain water production needs well into the future. 

The existing Quarles Plant 1 was constructed in the 1950s and had reached the end of its useful life. The replacement Quarles Plant 1 needed to be constructed within the same footprint of the existing facility while keeping the original facility operational to treat and deliver safe drinking water. The new 33 million gallons per day (MGD) Quarles Plant 1 includes treatment processes and structures with improved redundancy, reliability, and flexibility. The $72-million dollar James E. Quarles Plant 1 Replacement Project for CCMWA came in under budget by over $1 million dollars.




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