Water Quality in Castle Rock, CO (80104)
EPA violation data for public water systems serving ZIP code 80104.
Active Health Violations
20 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 95% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
38,479
Population
35
Water Systems
86
Violations (5yr)
20
Health-Based
Location
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Water Systems Serving This Area (35)
Castle Rock Town Of
All resolvedHighlands Ranch Wsd
Parker Wsd
Meridian Md
All resolvedFast Market No 4591
Academy Wsd
Independence Wsd
Valley View Christian Church
Castleton Center
St Francis Of Assisi Church
Creekside Bible Church
All resolvedLouviers Wsd
8 health-basedYogi Bears Jellystone Park Camp Resort
All resolvedDirectv Broadcast Facility
Littleton Franconia Notch Koa
Castle Rock Congre Of Jehovahs Witnesses
All resolvedGolf Club At Bear Dance The
Observer Ranch Campground
Trail Ridge Marina
Village Of Gentle Slopes
Sri Venkateswara Temple
Larkspur Elem School
E And C Precast Concrete Inc
Wishing Well Motel
9 health-basedRoggen Motel
3 health-basedTomah Road Cpgd
North East Elem Sch
El Kay Lake View Motel
All resolvedColo Agricultural Leadership Foundation
All resolvedWayward Wind Mhp Llc
Hillside Child Care
Blue River Trailer Court
Castle Rock Bowling Lanes
Pine Lane Schools Prim And Inter
Rockview Lounge
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
At high levels, nitrate can cause blue baby syndrome in infants.
Annual water quality report delivery requirement.
Missed testing deadlines — not a detection of bacteria.
Used to disinfect water — generally safe at regulated levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
Copper (Cu)
Exceeds limitSampled: Jul 2022
How Does This Compare?
Castle Rock (80104) has more violations than 95% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 86.
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.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 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.