WaterQ
Iowa State Report All States
Official Status: March 2026

Is Waterloo tap water safe to drink?

✓ Generally Safe
B

Mostly yes — Waterloo scores 84/100.

Safety Score
84
out of 100

Still not sure if you need a filter in Waterloo?

Read Decision Guide →

Waterloo

Iowa

View Iowa state report Data updated: Mar 2026

Is Waterloo tap water safe to drink?

Mostly yes — Waterloo scores 84/100. This report aggregates EPA drinking water data across 0 local systems in Waterloo. We found 0 total violations (0 unresolved).

Real-Time Environment

Live: 02:30 PM
0mm Precipitation

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

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 Waterloo?

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?

Wondering if Waterloo tap water needs filtering? We break it down.

Baby Formula Safety

Mixing baby formula with Waterloo tap water? Read this first.

Homebuyer's Perspective

If you're house-hunting in Waterloo, water quality belongs on your due-diligence checklist alongside schools and crime data. The high safety score (84/100) suggests lower risk for plumbing corrosion and appliance scaling.

Property Impact: Positive / Stable

Health & Family Safety

Current records show no major contaminant spikes, making Waterloo a preferred choice for health-conscious families.

View Health Risk Glossary →

Compliance Record for Waterloo

0
Violations (5yr)
0
Unresolved
0
Contaminants Tracked
0
Exceeding EPA Limit

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

Frequently Asked Questions

Is Waterloo tap water safe to drink?

Mostly yes — Waterloo scores 84/100.

How many water systems serve Waterloo?

Waterloo is served by 0 public water systems in our latest EPA-backed dataset.

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

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

What is the water quality score for Waterloo?

The water quality score for Waterloo is 84 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.

What are the top contaminants in Waterloo?

Current contaminant data for Waterloo is being updated. Check back soon or search your specific address for the latest results.

Water Quality Score
84/100
Grade
B
Water Systems
1
Population
69,504

Waterloo Water Quality Summary

Waterloo, IA receives a water quality score of 84/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.

Waterloo's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.

Waterloo's score of 84 is 11 points above the Iowa state average of 73, and above the nationwide average of roughly 78/100 across all U.S. states.

Residents and prospective homebuyers in Waterloo will find that this mid-size Iowa city's municipal water supply delivers a reliable standard of quality. However, because Waterloo is located in a Midwestern region dominated by intensive row-crop and livestock agriculture, the local groundwater is inherently susceptible to nitrate contamination. This agricultural environmental context requires ongoing vigilance, as seasonal farming runoff can directly influence the groundwater source. While the overall water quality remains solid, understanding these regional agricultural factors helps residents make informed decisions about their household water use.

Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Iowa water quality rankings report →

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Water Systems Serving Waterloo (0)

Water system data coming soon for Waterloo.

Related

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