Castle Rock, CO: 27 Violations - Home Safety 56/100
3 ZIP codes · 6 water systems · Updated
ZipCheckup grade for Castle Rock: C.
A mixed picture - some signals here are worth your attention.
Unlike higher-rated cities in CO, Castle Rock carries a fair number of documented violations - the pattern of compliance gaps keeps the city in the middle tier of EPA safety rankings.
How Castle Rock Compares
Data: EPA SDWIS
Castle Rock Water: The Quick Version
- Your city's water systems recorded 27 violations in the past 5 years.
- Average lead level: 0.0023 mg/L.
- Homes built before 1986: 12% - older plumbing may contain lead solder.
- Estimated remediation: $2,933 per household.
- CDC health risk index: 9.36.
Water Systems Serving Castle Rock
Water delivery in Castle Rock, CO is handled by 3 utilities rather than a single system - drawn from 6 providers in federal records, each filing its own compliance reports and setting its own rates.
- C
- D
- D
Overview
We track home safety data for 3 ZIP codes in Castle Rock, Colorado (population ~99,741), covering 6 community water systems serving approximately 218,766 people region-wide. The EPA snapshots used for this build directly map water systems to 3 of 3 ZIP codes.
3 of 3 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Castle Rock: C (56/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Castle Rock water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0023 mg/L (EPA action level: 0.015 mg/L)
- 0 of 3 ZIP codes with known status exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
- Zone 1 (High): 3 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 0 ZIP codes
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| E. coli | Microbiological | 9 | 3 |
| Gross Alpha | Radionuclides | 8 | 3 |
| Combined Radium | Radionuclides | 8 | 3 |
| Gross Beta | Radionuclides | 8 | 3 |
| Surface Water Treatment Rule | Treatment Technique | 6 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 80108 | D | 26 | 0 | Castle Pines North Md |
| 80104 | C | 9 | 0 | Castle Rock Town of |
| 80109 | C | 9 | 0 | Castle Rock Town of |
All ZIP Codes in Castle Rock
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
CDC Health Data for Castle Rock
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Key Contaminants Detected in Castle Rock
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Old Is Castle Rock's Housing Stock?
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Lead solder was federally prohibited in new plumbing in 1986. In Castle Rock, the median build year of 2006 puts a majority of homes in the lower-risk category for that specific contamination pathway - though the pre-1986 share shown above still carries real exposure potential at the individual household level.
Most homes in Castle Rock were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Castle Rock: Remediation Cost in Perspective
What does remediation cost in financial context for Castle Rock homeowners? Proportionally very little - the equity share here is low, and addressing documented issues is a manageable planning question rather than a material financial burden.
Remediation costs in Castle Rock are relatively low compared to home values. The $1,933–$4,100 estimated range is a small fraction of median property value. Home values are 43% above the Colorado average.
Protecting Children from Lead in Castle Rock
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older homes from the pre-rule era make up 12% of Castle Rock's inventory, a contained slice. Citywide aggregate readings stay below 0.015 mg/L under EPA Lead and Copper Rule monitoring, suggesting systemic lead is not a dominant local concern. What the aggregate cannot do is reflect conditions inside any single building, where interior plumbing age, water chemistry, and stagnation patterns interact differently than they do across thousands of service connections combined into one figure.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical Flood-Claim Evidence for Castle Rock
Historical NFIP data for Castle Rock contains 12 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $3,559. Among ZIP codes with claim records, 33% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. The <strong>$2,933</strong> remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Castle Rock
- Test your water at home. City-level data shows averages - your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for E. coli can reduce the most common contaminant found in Castle Rock's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Castle Rock, CO