Water Quality in Castle Rock, CO (80118)
EPA violation data for public water systems serving ZIP code 80118.
Active Health Violations
4 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 92% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
5,632
Population
10
Water Systems
57
Violations (5yr)
4
Health-Based
Location
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Water Systems Serving This Area (10)
Castle Rock Town Of
All resolvedHighlands Ranch Wsd
Parker Wsd
Meridian Md
All resolvedPerry Park Wsd
All resolvedLarkspur Town Of
4 health-basedStone Canyon Outdoor Edventures
Inn At Priest Lake
Ponderosa Retreat And Conference Ctr
All resolvedRavenna Md
Contaminants Found
Annual water quality report delivery requirement.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
How Does This Compare?
Castle Rock (80118) has more violations than 92% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 57.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Whole House Carbon Filter
A solid baseline for improving overall water quality. Reduces chlorine, sediment, and many common contaminants throughout your entire home.
Targets:Chlorine, Sediment, Taste & Odor
Look for:NSF/ANSI 42 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.