Keystone Ranch
EPA ID: CO0159065 · 670 people served · 1 ZIP code
ZipCheckup's reading of EPA SDWIS for Keystone Ranch (CO0159065): 1 past health-based violation, since resolved. 1 total violation across five years at Keystone Ranch - every finding closed, utility compliant today, 670 served.
Data: EPA SDWIS
Service Area Map
Coverage area for Keystone Ranch Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Keystone Ranch serves a community with a median household income of $86,023 and an estimated 8,447 residents across its service area. Approximately 53% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Keystone Ranch's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Detected Contaminants
How Keystone Ranch compares to EPA limits
What This Means For You
Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 7 detections recorded. 3 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Comparable Water Systems
Similar-sized systems in Colorado
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Keystone Ranch (EPA ID: CO0159065) is a community water system in Colorado that serves approximately 670 people from groundwater sources.
This system serves ZIP code 80435 in Dillon.
Violation History
Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| December 1, 2024 | Stage 1 DBP Rule | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 1 | Yes |
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.005 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CO or modeled from parcel and building-footprint data.
- 80435 - Dillon
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Keystone Ranch (CO0159065) on EPA.gov.
Frequently Asked Questions
Is Keystone Ranch water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Keystone Ranch; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Keystone Ranch serve?
Keystone Ranch serves approximately 670 people across 1 ZIP code in Colorado.
Where does Keystone Ranch get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Keystone Ranch (CO): 1 Health Violation. https://zipcheckup.com/water-system/co0159065/
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author = {{ZipCheckup}},
title = {{Keystone Ranch (CO): 1 Health Violation}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/co0159065/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Keystone Ranch (EPA ID: CO0159065) - request the latest Consumer Confidence Report or ask about specific contaminants.