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Stone Mountain, GA Tap Water Quality 2026

Water quality report for Stone Mountain, GA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Stone Mountain's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Dekalb County PWSID: GA0890001 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 5.50 ppb, 37% of the action level and no violations are open. No PFAS was detected.

A

Stone Mountain earns an A for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 5.50 ppb — 37% of the federal action level
PFAS tested, none detected
1 violations since 2015, 0 health-based
No violations currently open
Stone Mountain's lead level vs. all Georgia community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 5.50 ppb — 37% of the federal action level
✓ Lower lead than 14% of Georgia utilities
Population Served
6680
~193679 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
1 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
37% of EPA action level
5.50 ppb
Action level: 15 ppb
The 90th-percentile lead result is 5.50 ppb, 37% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Consumer Confidence Rule OTHER — — 2021 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

1 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Dekalb County
PWSID GA0890001
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 6,680
Service connections 193,679
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Stone Mountain tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 5.50 ppb, 37% of the action level.
Does Stone Mountain water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Stone Mountain? ▼
Dekalb County (PWSID GA0890001). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-11-14. No significant deficiencies were recorded.

What Should Stone Mountain Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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