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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 4 cities serving 133,831 residents
Gwinnett County in Georgia has an average water quality score of 74/100 (Grade B-) based on analysis of 4 municipal water systems. The county's water systems serve approximately 133,831 residents.
Water quality in Gwinnett County is fair, with some cities showing room for improvement. 2 cities have scores below 70, indicating elevated contaminant levels that residents should be aware of. Lawrenceville has the best water quality at 86/100.
4 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Lawrenceville Top concern: Mercury (29.5% of limit) | 86 | A- | 34,841 |
| 2 | Sugar Hill Top concern: Mercury (48.6% of limit) | 71 | B- | 29,449 |
| 3 | Duluth Top concern: Haloacetic Acids (41.2% of limit) | 69 | C+ | 26,946 |
| 4 | Peachtree Corners Top concern: Total Trihalomethanes (69.5% of limit) | 68 | C+ | 42,595 |
Top detected contaminants across county water systems
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| Haloacetic Acids | 26.605 ug/L | 36.596 ug/L | 60 ug/L | 44.3% | 3 |
| Total Trihalomethanes | 29.414 ug/L | 55.615 ug/L | 80 ug/L | 36.8% | 4 |
| Copper | 0.468 mg/L | 0.616 mg/L | 1.3 mg/L | 36% | 3 |
| Mercury | 0.001 mg/L | 0.001 mg/L | 0.002 mg/L | 31.7% | 3 |
| Lead | 0.005 mg/L | 0.005 mg/L | 0.015 mg/L | 30.9% | 3 |
| Fluoride | 1.101 mg/L | 1.301 mg/L | 4 mg/L | 27.5% | 4 |
| Arsenic | 0.002 mg/L | 0.005 mg/L | 0.01 mg/L | 23.3% | 4 |
| Chromium | 0.023 mg/L | 0.033 mg/L | 0.1 mg/L | 22.6% | 4 |
Recent violations across county water systems
Water quality in Gwinnett County, Georgia reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 4 municipal water systems serving a combined population of over 133,831 residents.
The county shows moderate water quality performance, with scores ranging from 68/100 in Peachtree Corners to 86/100 in Lawrenceville. This 18-point spread indicates relatively consistent water quality standards across municipal systems.
The most prevalent contaminants detected across Gwinnett County water systems include Haloacetic Acids, Total Trihalomethanes, Copper. All monitored contaminants remain within acceptable levels relative to EPA Maximum Contaminant Levels (MCLs).
Water quality in Gwinnett County is fair but shows room for improvement. Residents in cities scoring below 70 should consider water filtration, particularly for drinking and cooking. Check your specific city's report above for personalized recommendations.
Gwinnett County has an average water quality score of 74/100 (Grade B-) based on analysis of 4 municipal water systems serving 133,831 residents.
Lawrenceville has the highest water quality score in Gwinnett County at 86/100. View the detailed report for Lawrenceville.
Given the water quality variation across Gwinnett County, we recommend reviewing your specific city's water quality report. 2 cities have scores below 70, where filtration is particularly recommended.
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.