Oswego
Is Oswego tap water safe to drink?
Use extra caution — Oswego scores 42/100. This report aggregates EPA drinking water data across 1 local system in Oswego. We found 285 total violations (34 unresolved).
Real-Time Environment
Live: 02:15 AM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Oswego.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Oswego?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Filter requirements and certified reduction benchmarks for Oswego tap water.
Baby Formula Safety
Infant formula preparation risks, nitrate levels, and lead pipe guidance in Oswego.
Homebuyer's Perspective
Evaluating water infrastructure in Oswego protects plumbing and helps estimate water heater longevity. With a score of 42/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Oswego
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Oswego.
Frequently Asked Questions
Is Oswego tap water safe to drink?
Use extra caution — Oswego scores 42/100.
How many water systems serve Oswego?
Oswego is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Oswego?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Oswego.
What is the water quality score for Oswego?
The water quality score for Oswego is 42 out of 100, based on EPA contaminant data, violation history, and testing results across the 1 system serving the city.
What are the top contaminants in Oswego?
The top contaminants detected in Oswego include Lead (90th percentile). View detailed information on our contaminants page.
Oswego Water Quality Summary
Oswego, IL receives a water quality score of 42/100 (Grade F) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Oswego's water quality score is below the national average, indicating a history of EPA violations or elevated contaminant levels. Residents are encouraged to check their specific water system report and consider additional filtration.
Oswego's score of 42 is 24 points below the Illinois state average of 66, and below the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Illinois water quality rankings report →
Key Contaminants
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Water Systems Serving Oswego (1)
Check Your Specific Address
Water quality can vary by neighborhood in Oswego.
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Quick compare in Illinois
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