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Transient Non-Community Water System · PWS CO0247041

Tarryall River Ranch

Lake George, Colorado 80827 - drinking water served from surface water sources to 47 people, tracked in EPA SDWIS and UCMR5.

47
People served
58
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 58 drinking-water violations at Tarryall River Ranch, 10% of them health-based - below the Colorado per-system average.

58
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
47
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tarryall River Ranch

Tarryall River Ranch is a local-owned transient non-community water system that delivers drinking water to 47 residents in Lake George, Colorado (Park County) through 8 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 58 total violations for this system , of which 6 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 42 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 16 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%).

Tarryall River Ranch's 58 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
47
Total Violations
58
Health-Based Violations
6
Water Source
Surface Water

System Details

System Type
Transient Non-Community
Owner Type
Local
Connections
8
County
Park
School/Daycare
No
MCL Violations
3
Monitoring Violations
42
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 16 2015
Revised Total Coliform Rule MON 16 2023
Surface Water Treatment Rule MR 7 2023
Public Notice Other 6 2016
Revised Total Coliform Rule Other 4 2023
Nitrate MR 3 2014
Coliform (TCR) MCL 3 2014
Revised Total Coliform Rule TT 3 2016

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 Tarryall River Ranch.

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 CO0247041 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 Tarryall River Ranch 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
2023 Revised Total Coliform Rule MON 16 SDWIS / CO0247041 / 8000
2023 Surface Water Treatment Rule MR 7 SDWIS / CO0247041 / 0200
2023 Revised Total Coliform Rule Other 4 SDWIS / CO0247041 / 8000
2016 Public Notice Other 6 SDWIS / CO0247041 / 7500
2016 Revised Total Coliform Rule TT 3 SDWIS / CO0247041 / 8000
2015 Coliform (TCR) MR 16 SDWIS / CO0247041 / 3100
2014 Nitrate MR 3 SDWIS / CO0247041 / 1040
2014 Coliform (TCR) MCL 3 SDWIS / CO0247041 / 3100

How Tarryall River Ranch Compares

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

Metric Tarryall River Ranch Colorado avg Federal benchmark
Total violations 58 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 47 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 Tarryall River Ranch water safe to drink? ▼
Tarryall River Ranch (PWS ID: CO0247041) has 58 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 47 people using Surface Water sources.
How many people does Tarryall River Ranch serve? ▼
Tarryall River Ranch serves 47 people in Lake George, Colorado. It is a Local-owned system using Surface Water water sources with 8 service connections.
What type of violations does Tarryall River Ranch have? ▼
Tarryall River Ranch has 58 total violations: 6 health-based violations (MCL exceedances or treatment failures), 42 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tarryall River Ranch water? ▼
No PFAS testing data is available for Tarryall River Ranch under the EPA's UCMR5 monitoring program.
What water source does Tarryall River Ranch use? ▼
Tarryall River Ranch uses Surface Water as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.