Douglas County, Georgia: drinking water report. Douglas County west of Atlanta has about 146,000 residents, with Douglasville as the county seat.
Douglas County west of Atlanta has about 146,000 residents, with Douglasville as the county seat. The Douglas County Water and Sewer Authority draws from the Dog River Reservoir and the Chattahoochee River. Rapid suburban growth over the past two decades has transformed the county from rural to suburban, putting pressure on both water supply and wastewater infrastructure.
The Dog River Reservoir, completed in 2004, was built specifically to meet the county's growing water demand. According to the Georgia EPD's 2024 water quality monitoring data, the reservoir shows early signs of nutrient enrichment – total phosphorus concentrations averaged 0.035 mg/L, approaching the threshold associated with algal growth in southeastern reservoirs. Stormwater runoff from expanding development contributes nutrient loading.
The Chattahoochee River supply carries upstream Atlanta-area discharges by the time it reaches Douglas County's intake. A 2024 Georgia EPD study found PFAS at 9 ppt in the Chattahoochee at the county's withdrawal point, consistent with diffuse urban and industrial sources in the metro Atlanta watershed.
Douglas County's water supply is managed by a well-funded authority, but the combination of a relatively new reservoir showing early nutrient stress and a river supply carrying Atlanta's discharges warrants household-level attention.
Check your water for the latest monitoring results. A carbon block filter improves taste and reduces disinfection byproducts, while reverse osmosis adds PFAS protection. Our water filter guide covers systems appropriate for surface water supplies. Pull your detailed report for trends, and visit our Georgia page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Douglas County, GA.
The EPA places Douglas County, GA in Zone 2 - a moderate-risk category, with a predicted average indoor radon level between 2 and 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
25% of homes in Douglas County, GA were built before 1980, and 2% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Douglas County, GA averages 9 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide