Cobb County
EPA ID: GA0670003 · 695,000 people served · 34 ZIP codes
With a five-year violation-free history, Cobb County delivers safe water to 695,000 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Cobb County Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Cobb County serves a community with a median household income of $99,975 and an estimated 1,044,310 residents across its service area. Approximately 41% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Cobb County's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
About 1% of homes in Cobb County, Georgia rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 90 detections recorded. 6 exceed federal EPA limits (4 ppt for PFOA/PFOS). 6 exceed state limits.
Comparable Water Systems
Similar-sized systems in Georgia
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Cobb County (EPA ID: GA0670003) is a community water system in Georgia that serves approximately 695,000 people from surface water sources.
This system provides water to 34 ZIP codes across 14 communities.
Average Home Safety Score: C (55/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 30006 | 0.0011 mg/L | No | N/A |
| 30007 | 0.0011 mg/L | No | N/A |
| 30008 | 0.0011 mg/L | No | N/A |
| 30060 | 0.0011 mg/L | No | N/A |
| 30061 | 0.0011 mg/L | No | N/A |
| 30062 | 0.0011 mg/L | No | N/A |
| 30063 | 0.0011 mg/L | No | N/A |
| 30064 | 0.0011 mg/L | No | N/A |
| 30065 | 0.0011 mg/L | No | N/A |
| 30066 | 0.0011 mg/L | No | N/A |
| 30067 | 0.0011 mg/L | No | N/A |
| 30068 | 0.0011 mg/L | No | N/A |
| 30069 | 0.0011 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 24 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 10 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
This system serves 34 ZIP codes:
30006 · 30007 · 30008 · 30060 · 30061 30062 · 30063 · 30064 · 30065 · 30066 30067 · 30068 · 30069 · 30075 · 30080 30082 · 30090 · 30101 · 30102 · 30106 30111 · 30122 · 30126 · 30127 · 30141 30144 · 30152 · 30156 · 30157 · 30160 30168 · 30188 · 30339 · 31144
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Cobb County (GA0670003) on EPA.gov.
Frequently Asked Questions
Is Cobb County water safe to drink?
Based on EPA records, Cobb County has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Cobb County serve?
Cobb County serves approximately 695,000 people across 34 ZIP codes in Georgia.
Where does Cobb County get its water?
The primary water source is surface water.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Cobb County Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Cobb County Water System Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
A source water assessment plan was prepared for CCMWA by the Metropolitan North Georgia Water Planning District (MNGWPD). Its purpose is assessing the sources and determining the risk for potential pollution of surface drinking water supply sources. The most recent plan, completed in 2020, is a comprehensive 95-page document.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Treatment classification and chemical list sourced from Cobb County Water System Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Federal UCMR5 PFAS Monitoring: Detected
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). PFAS compounds were detected below the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
PFAS Substances Detected in This System
This water system's Consumer Confidence Report disclosed the following PFAS compounds. Levels are from the utility's most recent reporting cycle.
In April 2024, EPA finalized the first National Primary Drinking Water Regulation for six PFAS. Public water systems have until 2029 to comply. EPA — PFAS regulation overview →
Source: Consumer Confidence Report disclosed by Cobb County Water System.
ZipCheckup is not affiliated with this water utility. PFAS detection data is sourced from public Consumer Confidence Reports filed by the utility itself.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Cobb County (EPA ID: GA0670003) — request the latest Consumer Confidence Report or ask about specific contaminants.