Johnston
Is Johnston tap water safe to drink?
Mostly yes — Johnston scores 83/100. This report aggregates EPA drinking water data across 0 local systems in Johnston. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 07:45 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Johnston.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Johnston?
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 Johnston? See our analysis.
Baby Formula Safety
Is Johnston tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Johnston, water quality is a key factor in long-term property maintenance. The high safety score (83/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Current records show no major contaminant spikes, making Johnston a preferred choice for health-conscious families.
View Health Risk Glossary →Score Breakdown for Johnston
*Scores are calculated using weighted EPA monitoring data from the past 5 years.
Frequently Asked Questions
Is Johnston tap water safe to drink?
Mostly yes — Johnston scores 83/100.
How many water systems serve Johnston?
Johnston is served by 0 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Johnston?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Johnston.
What is the water quality score for Johnston?
The water quality score for Johnston is N/A out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Johnston?
Current contaminant data for Johnston is being updated. Check back soon or search your specific address for the latest results.
Johnston Water Quality Summary
Johnston, IA receives a water quality score of 83/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Johnston'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.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology →
Water Systems Serving Johnston (0)
Water system data coming soon for Johnston.
Check Your Specific Address
Water quality can vary by neighborhood in Johnston.
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Quick compare in Iowa
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