WaterQ
Idaho State Report All States
Official Status: March 2026

Is Post Falls tap water safe to drink?

✓ Generally Safe
A

Mostly yes — Post Falls scores 97/100.

Safety Score
97
out of 100

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Post Falls

Idaho

View Idaho state report Data updated: Mar 2026

Is Post Falls tap water safe to drink?

Mostly yes — Post Falls scores 97/100. This report aggregates EPA drinking water data across 3 local systems in Post Falls. We found 698 total violations (80 unresolved).

Real-Time Environment

Live: 11:45 AM
0mm Precipitation

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

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 Post Falls?

Requirement Status
Optional
🟢
💡

Expert Advice

Your water quality is excellent. Standard filtration is optional but can further enhance taste.

Buying a Filter?

Filtration technologies matched to Post Falls contaminant records.

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Baby Formula Safety

Guidance on preparing infant formula using municipal tap water in Post Falls.

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Homebuyer's Perspective

Municipal water quality in Post Falls directly influences pipe corrosion rates and home filtration needs. The high safety score (97/100) suggests lower risk for plumbing corrosion and appliance scaling.

Property Impact: Positive / Stable

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 Post Falls

698
Violations (5yr)
80
Unresolved
1
Contaminants Tracked
0
Exceeding EPA Limit

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

Frequently Asked Questions

Is Post Falls tap water safe to drink?

Mostly yes — Post Falls scores 97/100.

How many water systems serve Post Falls?

Post Falls is served by 3 public water systems in our latest EPA-backed dataset.

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

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

What is the water quality score for Post Falls?

The water quality score for Post Falls is 97 out of 100, based on EPA contaminant data, violation history, and testing results across the 3 systems serving the city.

What are the top contaminants in Post Falls?

The top contaminants detected in Post Falls include Lead (90th percentile). View detailed information on our contaminants page.

Water Quality Score
97/100
Grade
A
Water Systems
3
Population
40,415

Post Falls Water Quality Summary

Post Falls, ID receives a water quality score of 97/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 3 public water systems serving the area.

Post Falls'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.

Post Falls's score of 97 is 17 points above the Idaho state average of 80, and above 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 Idaho water quality rankings report →

Key Contaminants

Lead (90th percentile)
0.003 / 0.015 mg/L
0 mg/L MCL: 0.015 mg/L

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Water Systems Serving Post Falls (3)

Related

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