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Community Water System · PWS CO0247017

Eleven Mile Ranch Association

Lake George, Colorado 80827 - drinking water served from surface water sources to 72 people, tracked in EPA SDWIS and UCMR5.

72
People served
105
EPA violations
22
Health-based
Untested
UCMR5 result

The verdict

EPA records 105 drinking-water violations at Eleven Mile Ranch Association, 21% of them health-based - below the Colorado per-system average.

105
Total EPA violations on record
21%
Health-based (MCL / treatment failure)
72
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Eleven Mile Ranch Association

Eleven Mile Ranch Association is a private-owned community water system that delivers drinking water to 72 residents in Lake George, Colorado (Park County) through 72 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 105 total violations for this system , of which 22 (21%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 79 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 21 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Colorado, EPA tracks 2,193 public water systems serving 7,473,456 people, with 238,796 cumulative violations and 30,589 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 108.9 violations. Statewide, 37 of 163 UCMR5-tested systems have reported PFAS detections (22.7%).

Eleven Mile Ranch Association's 105 violations sit below the Colorado average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
72
Total Violations
105
Health-Based Violations
22
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
72
County
Park
School/Daycare
No
MCL Violations
14
Monitoring Violations
79
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 21 2024
Interim Enhanced Surface Water Treatment Rule MR 21 2024
E. COLI MR 15 2025
Nitrate MCL 14 2015
Lead and Copper Rule MR 11 2024
Surface Water Treatment Rule TT 8 2023
Coliform (TCR) MR 4 2003
Fluoride MR 4 2021
Nitrate MR 3 2019

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Eleven Mile Ranch Association.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID CO0247017 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Colorado Drinking Water Authority

Colorado Department of Public Health and Environment, Water Quality Control is the primacy agency that licenses and inspects Eleven Mile Ranch Association under EPA-delegated authority.

Open CO regulator portal

Source: Colorado Department of Public Health and Environment, Water Quality Control

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 E. COLI MR 15 SDWIS / CO0247017 / 3014
2024 Surface Water Treatment Rule MR 21 SDWIS / CO0247017 / 0200
2024 Interim Enhanced Surface Water Treatment Rule MR 21 SDWIS / CO0247017 / 0300
2024 Lead and Copper Rule MR 11 SDWIS / CO0247017 / 5000
2023 Surface Water Treatment Rule TT 8 SDWIS / CO0247017 / 0200
2021 Fluoride MR 4 SDWIS / CO0247017 / 1025
2019 Nitrate MR 3 SDWIS / CO0247017 / 1040
2015 Nitrate MCL 14 SDWIS / CO0247017 / 1040
2003 Coliform (TCR) MR 4 SDWIS / CO0247017 / 3100

How Eleven Mile Ranch Association Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Eleven Mile Ranch Association Colorado avg Federal benchmark
Total violations 105 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 22 13.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 22.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 72 3,408 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,193 regulated public water systems in Colorado.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Eleven Mile Ranch Association water safe to drink? ▼
Eleven Mile Ranch Association (PWS ID: CO0247017) has 105 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 72 people using Surface Water sources.
How many people does Eleven Mile Ranch Association serve? ▼
Eleven Mile Ranch Association serves 72 people in Lake George, Colorado. It is a Private-owned system using Surface Water water sources with 72 service connections.
What type of violations does Eleven Mile Ranch Association have? ▼
Eleven Mile Ranch Association has 105 total violations: 22 health-based violations (MCL exceedances or treatment failures), 79 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Eleven Mile Ranch Association water? ▼
No PFAS testing data is available for Eleven Mile Ranch Association under the EPA's UCMR5 monitoring program.
What water source does Eleven Mile Ranch Association use? ▼
Eleven Mile Ranch Association uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.