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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 2 cities serving 176,583 residents
Linn County in Iowa has an average water quality score of 74/100 (Grade B-) based on analysis of 2 municipal water systems. The county's water systems serve approximately 176,583 residents.
Water quality in Linn County is fair, with some cities showing room for improvement. 1 cities have scores below 70, indicating elevated contaminant levels that residents should be aware of. Marion has the best water quality at 84/100.
2 cities ranked by water quality score
| Rank | City | Score | Grade | Population |
|---|---|---|---|---|
| 1 | Marion Top concern: Haloacetic Acids (26.6% of limit) | 84 | B+ | 39,259 |
| 2 | Cedar Rapids Top concern: Lead (57.3% of limit) | 64 | C | 137,324 |
Top detected contaminants across county water systems
| Contaminant | Avg Level | Max Level | EPA Limit | % of Limit | Cities |
|---|---|---|---|---|---|
| Lead | 0.005 mg/L | 0.009 mg/L | 0.015 mg/L | 35.3% | 2 |
| Total Trihalomethanes | 27.006 ug/L | 36.495 ug/L | 80 ug/L | 33.8% | 2 |
| Haloacetic Acids | 15.971 ug/L | 15.971 ug/L | 60 ug/L | 26.6% | 1 |
| Chromium | 0.026 mg/L | 0.042 mg/L | 0.1 mg/L | 26.4% | 2 |
| Nitrite | 0.258 mg/L | 0.393 mg/L | 1 mg/L | 25.8% | 2 |
| Copper | 0.326 mg/L | 0.546 mg/L | 1.3 mg/L | 25.1% | 2 |
| Fluoride | 0.962 mg/L | 1.18 mg/L | 4 mg/L | 24.1% | 2 |
| Arsenic | 0.002 mg/L | 0.004 mg/L | 0.01 mg/L | 24% | 2 |
Recent violations across county water systems
Water quality in Linn County, Iowa reflects the region's unique combination of water sources, treatment infrastructure, and environmental factors. Our comprehensive analysis examines 2 municipal water systems serving a combined population of over 176,583 residents.
The county shows moderate water quality performance, with scores ranging from 64/100 in Cedar Rapids to 84/100 in Marion. This 20-point spread indicates relatively consistent water quality standards across municipal systems.
The most prevalent contaminants detected across Linn County water systems include Lead, Total Trihalomethanes, Haloacetic Acids. All monitored contaminants remain within acceptable levels relative to EPA Maximum Contaminant Levels (MCLs).
Water quality in Linn 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.
Linn County has an average water quality score of 74/100 (Grade B-) based on analysis of 2 municipal water systems serving 176,583 residents.
Marion has the highest water quality score in Linn County at 84/100. View the detailed report for Marion.
Given the water quality variation across Linn County, we recommend reviewing your specific city's water quality report. 1 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.