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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 5 cities serving 164,849 residents
Jefferson County in Louisiana has an average water quality score of 81/100 (Grade B+) based on analysis of 5 municipal water systems. The county's water systems serve approximately 164,849 residents.
Overall, Jefferson County demonstrates good water quality standards. 4 of 5 cities exceed the county average, with Estelle leading with a score of 95/100.
5 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Estelle Top concern: Haloacetic Acids (15% of limit) | 95 | A+ | 19,691 |
| 2 | Marrero Top concern: Haloacetic Acids (22.6% of limit) | 83 | B+ | 35,196 |
| 3 | Kenner Top concern: Total Trihalomethanes (41.8% of limit) | 81 | B+ | 66,094 |
| 4 | Terrytown Top concern: Nitrite (27% of limit) | 81 | B+ | 26,438 |
| 5 | Harvey Top concern: Haloacetic Acids (68.8% of limit) | 67 | C+ | 17,430 |
Top detected contaminants across county water systems
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| Haloacetic Acids | 16.655 ug/L | 41.284 ug/L | 60 ug/L | 27.8% | 5 |
| Total Trihalomethanes | 21.839 ug/L | 36.047 ug/L | 80 ug/L | 27.3% | 4 |
| Copper | 0.279 mg/L | 0.74 mg/L | 1.3 mg/L | 21.5% | 4 |
| Fluoride | 0.796 mg/L | 0.988 mg/L | 4 mg/L | 19.9% | 4 |
| Nitrite | 0.193 mg/L | 0.432 mg/L | 1 mg/L | 19.3% | 5 |
| Lead | 0.003 mg/L | 0.006 mg/L | 0.015 mg/L | 18.7% | 5 |
| Mercury | 0 mg/L | 0.001 mg/L | 0.002 mg/L | 17.5% | 4 |
| Nitrate | 1.648 mg/L | 4.361 mg/L | 10 mg/L | 16.5% | 5 |
Recent violations across county water systems
Water quality in Jefferson County, Louisiana reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 5 municipal water systems serving a combined population of over 164,849 residents.
The county shows strong water quality performance, with scores ranging from 67/100 in Harvey to 95/100 in Estelle. This 28-point spread indicates significant variation in water quality across the county, suggesting different water sources or treatment approaches.
The most prevalent contaminants detected across Jefferson County water systems include Haloacetic Acids, Total Trihalomethanes, Copper. All monitored contaminants remain within acceptable levels relative to EPA Maximum Contaminant Levels (MCLs).
Jefferson 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.
Jefferson County has an average water quality score of 81/100 (Grade B+) based on analysis of 5 municipal water systems serving 164,849 residents.
Estelle has the highest water quality score in Jefferson County at 95/100. View the detailed report for Estelle.
Most cities in Jefferson 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.