Castle Rock
Is Castle Rock tap water safe to drink?
Mostly yes — Castle Rock scores 94/100. This report aggregates EPA drinking water data across 3 local systems in Castle Rock. We found 230 total violations (4 unresolved).
Real-Time Environment
Live: 09:00 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Castle Rock.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Castle Rock?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filtration technologies matched to Castle Rock contaminant records.
Baby Formula Safety
Guidance on preparing infant formula using municipal tap water in Castle Rock.
Homebuyer's Perspective
Municipal water quality in Castle Rock directly influences pipe corrosion rates and home filtration needs. The high safety score (94/100) suggests lower risk for plumbing corrosion and appliance scaling.
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 Castle Rock
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Castle Rock.
Frequently Asked Questions
Is Castle Rock tap water safe to drink?
Mostly yes — Castle Rock scores 94/100.
How many water systems serve Castle Rock?
Castle Rock is served by 3 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Castle Rock?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Castle Rock.
What is the water quality score for Castle Rock?
The water quality score for Castle Rock is 94 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 Castle Rock?
The top contaminants detected in Castle Rock include Lead (90th percentile). View detailed information on our contaminants page.
Castle Rock Water Quality Summary
Castle Rock, CO receives a water quality score of 94/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 3 public water systems serving the area.
Castle Rock'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.
Castle Rock's score of 94 is 12 points above the Colorado state average of 82, and above the nationwide average of roughly 78/100 across all U.S. states.
High-elevation source water in the Mountain West region feeds the municipal supply of this mid-size Colorado city, where water is managed across several distinct systems. While the surrounding region is influenced by a historic hardrock mining legacy, Castle Rock's water systems achieve outstanding quality ratings. For prospective homebuyers and current residents, these results offer strong reassurance regarding the safety and cleanliness of their tap water.
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 Castle Rock (3)
Check Your Specific Address
Water quality can vary by neighborhood in Castle Rock.
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