WaterQ
Illinois State Report All States
Official Status: March 2026

Is Algonquin tap water safe to drink?

⚠ Caution Advised
D

Use extra caution — Algonquin scores 39/100.

Safety Score
39
out of 100

Still not sure if you need a filter in Algonquin?

Read Decision Guide →

Algonquin

Illinois

View Illinois state report Data updated: Mar 2026

Is Algonquin tap water safe to drink?

Use extra caution — Algonquin scores 39/100. This report aggregates EPA drinking water data across 1 local system in Algonquin. We found 83 total violations (48 unresolved).

Real-Time Environment

Live: 02:15 PM
0mm Precipitation

☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Algonquin.

Water Quality Impact

✅ Minimal Impact Localized weather conditions may influence test result variability.

🛡️ Home Water Treatment Needs

Should you invest in filtration or softening for your home in Algonquin?

Requirement Status
Recommended
🟡
💡

Expert Advice

Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.

Buying a Filter?

Should you buy a water purifier in Algonquin? See our analysis.

Baby Formula Safety

Is Algonquin tap water safe for infants? Critical safety guide.

Homebuyer's Perspective

For those looking to relocate to Algonquin, water quality is a key factor in long-term property maintenance. With a score of 39/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.

Property Impact: Requires Mitigation

Health & Family Safety

Residents should monitor Copper (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 Algonquin

83
Violations (5yr)
48
Unresolved
2
Contaminants Tracked
1
Exceeding EPA Limit

Based on EPA SDWIS violation records and contaminant test results for all water systems serving Algonquin.

Frequently Asked Questions

Is Algonquin tap water safe to drink?

Use extra caution — Algonquin scores 39/100.

How many water systems serve Algonquin?

Algonquin is served by 1 public water system in our latest EPA-backed dataset.

How can I check water quality for my exact address in Algonquin?

Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Algonquin.

What is the water quality score for Algonquin?

The water quality score for Algonquin is 39 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 Algonquin?

The top contaminants detected in Algonquin include Copper (90th percentile), Lead (90th percentile). View detailed information on our contaminants page.

Water Quality Score
39/100
Grade
F
Water Systems
1
Population
30,700

Algonquin Water Quality Summary

Algonquin, IL receives a water quality score of 39/100 (Grade F) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.

Algonquin'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.

Algonquin's score of 39 is 27 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

Copper (90th percentile) Violation
1.6 / 1.3 mg/L
0 mg/L MCL: 1.3 mg/L
Lead (90th percentile)
0.0004 / 0.015 mg/L
0 mg/L MCL: 0.015 mg/L

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Water Systems Serving Algonquin (1)

Related

Compare Algonquin water quality: View all states · Contaminant library · How we score water quality