Johnstown
Is Johnstown tap water safe to drink?
Generally acceptable, but review local hotspots — score 77/100. This report aggregates EPA drinking water data across 1 local system in Johnstown. We found 294 total violations (10 unresolved).
Real-Time Environment
Live: 06:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Johnstown.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Johnstown?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Evaluation of municipal compliance and household filtration options in Johnstown.
Baby Formula Safety
EPA compliance thresholds and pediatric water precautions for Johnstown.
Homebuyer's Perspective
Water system history in Johnstown informs property maintenance and private filtration requirements. With a score of 77/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
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 Johnstown
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Johnstown.
Frequently Asked Questions
Is Johnstown tap water safe to drink?
Generally acceptable, but review local hotspots — score 77/100.
How many water systems serve Johnstown?
Johnstown is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Johnstown?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Johnstown.
What is the water quality score for Johnstown?
The water quality score for Johnstown is 77 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 Johnstown?
The top contaminants detected in Johnstown include Lead (90th percentile). View detailed information on our contaminants page.
Johnstown Water Quality Summary
Johnstown, CO receives a water quality score of 77/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Johnstown's water quality is near the national average. While most systems meet EPA standards, some violations have been recorded. Residents may wish to review their specific water system's report for contaminant details.
Johnstown's score of 77 is 5 points below the Colorado state average of 82, 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 Colorado water quality rankings report →
Key Contaminants
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Water Systems Serving Johnstown (1)
Check Your Specific Address
Water quality can vary by neighborhood in Johnstown.
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