Loading water data...
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 6 cities serving 566,665 residents
Fairfield County in Connecticut has an average water quality score of 80/100 (Grade B+) based on analysis of 6 municipal water systems. The county's water systems serve approximately 566,665 residents.
Overall, Fairfield County demonstrates good water quality standards. 4 of 6 cities exceed the county average, with Norwalk leading with a score of 88/100.
6 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Norwalk Top concern: Haloacetic Acids (21.6% of limit) | 88 | A- | 88,004 |
| 2 | Bridgeport Top concern: Fluoride (19.5% of limit) | 87 | A- | 152,457 |
| 3 | Stratford Top concern: Haloacetic Acids (31.4% of limit) | 82 | B+ | 56,925 |
| 4 | Shelton Top concern: Lead (38.9% of limit) | 82 | B+ | 45,118 |
| 5 | Stamford Top concern: Haloacetic Acids (44.5% of limit) | 72 | B- | 133,320 |
| 6 | Danbury Top concern: Lead (66.1% of limit) | 67 | C+ | 90,841 |
Top detected contaminants across county water systems
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| Haloacetic Acids | 16.199 ug/L | 26.727 ug/L | 60 ug/L | 27% | 6 |
| Lead | 0.004 mg/L | 0.01 mg/L | 0.015 mg/L | 26.7% | 6 |
| Total Trihalomethanes | 19.804 ug/L | 43.03 ug/L | 80 ug/L | 24.8% | 6 |
| Fluoride | 0.852 mg/L | 1.359 mg/L | 4 mg/L | 21.3% | 6 |
| Copper | 0.243 mg/L | 0.367 mg/L | 1.3 mg/L | 18.7% | 5 |
| Nitrate | 1.612 mg/L | 2.483 mg/L | 10 mg/L | 16.1% | 6 |
| Nitrite | 0.142 mg/L | 0.293 mg/L | 1 mg/L | 14.2% | 6 |
| Chromium | 0.013 mg/L | 0.045 mg/L | 0.1 mg/L | 13.2% | 6 |
Recent violations across county water systems
Water quality in Fairfield County, Connecticut reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 6 municipal water systems serving a combined population of over 566,665 residents.
The county shows strong water quality performance, with scores ranging from 67/100 in Danbury to 88/100 in Norwalk. This 21-point spread indicates significant variation in water quality across the county, suggesting different water sources or treatment approaches.
The most prevalent contaminants detected across Fairfield County water systems include Haloacetic Acids, Lead, Total Trihalomethanes. All monitored contaminants remain within acceptable levels relative to EPA Maximum Contaminant Levels (MCLs).
Fairfield 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.
Fairfield County has an average water quality score of 80/100 (Grade B+) based on analysis of 6 municipal water systems serving 566,665 residents.
Norwalk has the highest water quality score in Fairfield County at 88/100. View the detailed report for Norwalk.
Most cities in Fairfield 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.