Johns Island
Is Johns Island tap water safe to drink?
Mostly yes — Johns Island scores 90/100. This report aggregates EPA drinking water data across 0 local systems in Johns Island. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 04:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Johns Island.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Johns Island?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Wondering if Johns Island tap water needs filtering? We break it down.
Baby Formula Safety
Mixing baby formula with Johns Island tap water? Read this first.
Homebuyer's Perspective
If you're house-hunting in Johns Island, water quality belongs on your due-diligence checklist alongside schools and crime data. The high safety score (90/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Current records show no major contaminant spikes, making Johns Island a preferred choice for health-conscious families.
View Health Risk Glossary →Compliance Record for Johns Island
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Johns Island.
Frequently Asked Questions
Is Johns Island tap water safe to drink?
Mostly yes — Johns Island scores 90/100.
How many water systems serve Johns Island?
Johns Island is served by 0 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Johns Island?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Johns Island.
What is the water quality score for Johns Island?
The water quality score for Johns Island is 90 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in Johns Island?
Current contaminant data for Johns Island is being updated. Check back soon or search your specific address for the latest results.
Johns Island Water Quality Summary
Johns Island, SC receives a water quality score of 90/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
Johns Island'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.
Johns Island's score of 90 is 1 point above the South Carolina state average of 89, 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 South Carolina water quality rankings report →
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Water Systems Serving Johns Island (0)
Water system data coming soon for Johns Island.
Check Your Specific Address
Water quality can vary by neighborhood in Johns Island.
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Compare Johns Island water quality: View all states · Contaminant library · How we score water quality