Water Quality in Castle Rock, CO (80138)
EPA violation data for public water systems serving ZIP code 80138.
No Health-Based Violations
None of the 6 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are19 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 78% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
36,895
Population
6
Water Systems
19
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (6)
Castle Rock Town Of
All resolvedHighlands Ranch Wsd
Parker Wsd
Meridian Md
All resolvedChatfield South Wd
All resolvedSpirit Of Hope Lutheran Church
All resolvedContaminants Found
Annual water quality report delivery requirement.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
How Does This Compare?
Castle Rock (80138) has more violations than 78% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 19, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.