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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Water quality data for 3 cities serving 142,019 residents
DeKalb County in Georgia has an average water quality score of 84/100 (Grade B+) based on analysis of 3 municipal water systems. The county's water systems serve approximately 142,019 residents.
Overall, DeKalb County demonstrates good water quality standards. 2 of 3 cities exceed the county average, with Dunwoody leading with a score of 93/100.
3 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Dunwoody Top concern: Haloacetic Acids (17.7% of limit) | 93 | A | 55,996 |
| 2 | Tucker Top concern: Nitrate (13.4% of limit) | 84 | B+ | 34,876 |
| 3 | Brookhaven Top concern: Mercury (26.2% of limit) | 75 | B | 51,147 |
Top detected contaminants across county water systems
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| Fluoride | 0.703 mg/L | 0.812 mg/L | 4 mg/L | 17.6% | 2 |
| Arsenic | 0.002 mg/L | 0.002 mg/L | 0.01 mg/L | 16% | 2 |
| Haloacetic Acids | 8.743 ug/L | 12.648 ug/L | 60 ug/L | 14.6% | 3 |
| Mercury | 0 mg/L | 0.001 mg/L | 0.002 mg/L | 13.3% | 3 |
| Total Trihalomethanes | 10.546 ug/L | 17.397 ug/L | 80 ug/L | 13.2% | 3 |
| Nitrate | 1.12 mg/L | 1.343 mg/L | 10 mg/L | 11.2% | 3 |
| Nitrite | 0.087 mg/L | 0.103 mg/L | 1 mg/L | 8.7% | 3 |
| Copper | 0.077 mg/L | 0.104 mg/L | 1.3 mg/L | 5.9% | 3 |
Recent violations across county water systems
Water quality in DeKalb County, Georgia reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 3 municipal water systems serving a combined population of over 142,019 residents.
The county shows strong water quality performance, with scores ranging from 75/100 in Brookhaven to 93/100 in Dunwoody. This 18-point spread indicates relatively consistent water quality standards across municipal systems.
The most prevalent contaminants detected across DeKalb County water systems include Fluoride, Arsenic, Haloacetic Acids. All monitored contaminants remain within acceptable levels relative to EPA Maximum Contaminant Levels (MCLs).
DeKalb County's water quality is generally good. Residents can feel confident in their tap water quality, though those with specific health concerns or sensitivity to certain contaminants may still benefit from filtration. Regular review of your city's annual Consumer Confidence Report is recommended.
DeKalb County has an average water quality score of 84/100 (Grade B+) based on analysis of 3 municipal water systems serving 142,019 residents.
Dunwoody has the highest water quality score in DeKalb County at 93/100. View the detailed report for Dunwoody.
Most cities in DeKalb County have water that meets EPA standards. However, a water filter can provide additional protection and improve taste. The need depends on your specific city and any personal health considerations.
Click on any city in the rankings table above to view its detailed water quality report, including contaminant levels, EPA compliance history, and filter recommendations.