Mountain Water Supply District
EPA ID: CO0130100 · 1,941 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Mountain Water Supply District (CO0130100): 1 violation recorded with unresolved status in the SDWIS data used. Mountain Water Supply District's EPA file includes 1 unresolved violation; the utility supplies water to approximately 1,941 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Mountain Water Supply District Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Mountain Water Supply District have a median household income of $130,228 and about 12,280 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Mountain Water Supply District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 70th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
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
Mountain Water Supply District (EPA ID: CO0130100) is a community water system in Colorado that serves approximately 1,941 people from surface water sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 4 resolved, 1 archived, 0 addressed, and 1 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 |
|---|---|---|---|
| April 1, 2026 | Gross Alpha | Health-based | Unaddressed (current) |
| January 1, 2026 | Gross Alpha | Health-based | Archived |
| July 1, 2025 | Consumer Confidence Rule | Non-health-based | Resolved |
| October 1, 2024 | Surface Water Treatment Rule | Non-health-based | Resolved |
| October 1, 2024 | Interim Enhanced Surface Water Treatment Rule | Non-health-based | Resolved |
| May 1, 2024 | Interim Enhanced Surface Water Treatment Rule | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Gross Alpha | MCL Violation | 2 | Yes |
| Interim Enhanced Surface Water Treatment Rule | Treatment Technique, Monitoring & Reporting | 2 | Yes |
| Consumer Confidence Rule | Other (notice or report rule) | 1 | No |
| Consumer Confidence Rule | Monitoring & Reporting | 1 | No |
Health Risk Details
Gross Alpha Particle Activity (EPA limit: pCi/L)
Increased cancer risk from radioactive particles At-risk groups: long-term residents in areas with uranium or radium-rich geology, people on private wells in western US.
Treatment options (verify a product is certified to reduce this contaminant): reverse osmosis, ion exchange, lime softening. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.004 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
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.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Mountain Water Supply District (CO0130100) on EPA.gov.
Frequently Asked Questions
Is Mountain Water Supply District water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 1 current health-based noncompliance record for Mountain Water Supply District. Review the utility's current notices and EPA record. This system-level compliance history cannot determine conditions at a specific tap.
How many people does Mountain Water Supply District serve?
Mountain Water Supply District serves approximately 1,941 people across 2 ZIP codes in Colorado.
Where does Mountain Water Supply District get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Mountain Water Supply District (CO): 3 Health Violations. https://zipcheckup.com/water-system/co0130100/
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author = {{ZipCheckup}},
title = {{Mountain Water Supply District (CO): 3 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/co0130100/}
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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
Mountain Water Supply District (EPA ID: CO0130100) - request the latest Consumer Confidence Report or ask about specific contaminants.