South Atlantic Water Science Center

Due to a lapse in appropriations, sampling for Bacterialert has been temporarily discontinued. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted. For more information, please see

Chattahoochee River BacteriAlert: Sampling Sites

This map shows the bacteria sampling site locations for the Chattahoochee River BacteriALERT Network. Other sites of concern, such as the National Park Service recreation areas, wastewater outfall points, and combined sewer overflow points are also shown.

Sampling sites:

Map of the Chattahoochee area and the 3 sampling sites.

Sampling Sites

Turbidity readings and bacteria samples are being collected at the Chattahoochee River at Medlock Bridge Road, the Chattahoochee River at Johnson's Ferry Road, and at the Chattahoochee River at Paces Ferry Road.

Chattahoochee River National Recreation Areas are green


The Chattahoochee River National Recreation Area (CRNRA) includes the Chattahoochee River downstream from Buford Dam to the mouth of Peachtree Creek and a series of park areas adjacent to the river. The National Park Service manages the CRNRA and most of the public access points to the Chattahoochee River are at CRNRA park units.

Picture of icon for sewer outfalls


Location of treated effluent discharge from municipal wastewater treatment facilities that discharge more than one million gallons per day in 2000.


A discharge of untreated sewage and stormwater to a stream when the capacity of a combined storm/sanitary sewer system is exceeded by storm runoff.