Public water system · GA0670003
ActiveCobb County
At a glance
Cobb County (PWSID GA0670003) is an active community water system in Cobb County, Georgia. It reports serving 695,000 people through 183,518 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
695,000
Service connections
183,518
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Cobb County compare with other water systems in Cobb County?
By EPA's size categories, Cobb County is a very large system (more than 100,000 people). Cobb County has 5 active public water systems, and Cobb County is the largest of them by population served. Its population served is about 4.3 times the county average of 160,676 people per system, and accounts for 87% of the 803,382 people reported by systems filed under the county. Across Georgia, the 2,375 active systems average 4,525 people each. Nationally, the average active community water system reports serving 6,703 people, so Cobb County is about 104 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Georgia has 1,724 active community water systems, 73% of the state's 2,375 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 138 Georgia systems (5.8%) list purchased surface water as their primary source.
Who owns and regulates Cobb County?
EPA lists Cobb County as owned by a local government. The GA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 5 active systems in Cobb County (100%) are also owned by a local government.
Does Cobb County have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2007. The violations listed here began between July 1992 and July 2007. By type: 1 public notice, recordkeeping or other, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as archived and 1 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 3 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Cobb County: frequently asked questions
Who runs Cobb County?
Cobb County (PWSID GA0670003) is a community water system owned by a local government. It is regulated by the GA state drinking water program.
How many people does Cobb County serve?
Cobb County reports serving 695,000 people through 183,518 service connections in Cobb County, Georgia.
Where does Cobb County get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Cobb County have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2007. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Cobb County's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in July 2007. For current results, consult the system's annual water quality report, EPA ECHO, or the GA state drinking water program.
Where can I find Cobb County's water quality report?
As a community water system, Cobb County must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Cobb County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Marietta Board of Lights and Water | Cobb | 60,100 | Community | Purchased surface water |
| Smyrna | Cobb | 40,508 | Community | Purchased surface water |
| Austell | Cobb | 7,774 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Cobb County, PWSID GA0670003, Georgia”, https://aquacensus.com/water-systems/georgia/cobb-county-ga0670003 (data as of October 1, 2026).