PlainWater
States → Colorado

Community Water System · PWS CO0157011

Aldasoro Ranch Hoc

Telluride, Colorado 81435 - drinking water served from groundwater sources to 412 people, tracked in EPA SDWIS and UCMR5.

412
People served
389
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 389 drinking-water violations at Aldasoro Ranch Hoc - above the Colorado per-system average.

389
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
412
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Aldasoro Ranch Hoc

Aldasoro Ranch Hoc is a private-owned community water system that delivers drinking water to 412 residents in Telluride, Colorado (San Miguel County) through 103 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 389 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 387 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 18 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, 98 of 163 UCMR5-tested systems have reported PFAS detections (60.1%).

Aldasoro Ranch Hoc's 389 violations sit above 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
412
Total Violations
389
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
103
County
San Miguel
School/Daycare
No
MCL Violations
0
Monitoring Violations
387
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 18 2016
DICHLOROMETHANE MR 18 2016
o-Dichlorobenzene MR 18 2016
trans-1,2-Dichloroethylene MR 18 2016
1,2-Dichloroethane MR 18 2016
1,1,1-Trichloroethane MR 18 2016
Carbon tetrachloride MR 18 2016
1,1,2-Trichloroethane MR 18 2016
Tetrachloroethylene MR 18 2016
Benzene MR 18 2016
Vinyl chloride MR 18 2016
Trichloroethylene MR 18 2016
CHLOROBENZENE MR 18 2016
Styrene MR 18 2016
1,1-Dichloroethylene MR 18 2016
Toluene MR 18 2016
p-Dichlorobenzene MR 18 2016
1,2-Dichloropropane MR 18 2016
Ethylbenzene MR 18 2016
1,2,4-Trichlorobenzene MR 18 2016
Xylenes, Total MR 18 2016
Coliform (TCR) MR 6 2015
Chlorine MR 3 2015
Consumer Confidence Rule Other 2 2015

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 Aldasoro Ranch Hoc.

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 CO0157011 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 Aldasoro Ranch Hoc 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
2016 cis-1,2-Dichloroethylene MR 18 SDWIS / CO0157011 / 2380
2016 DICHLOROMETHANE MR 18 SDWIS / CO0157011 / 2964
2016 o-Dichlorobenzene MR 18 SDWIS / CO0157011 / 2968
2016 trans-1,2-Dichloroethylene MR 18 SDWIS / CO0157011 / 2979
2016 1,2-Dichloroethane MR 18 SDWIS / CO0157011 / 2980
2016 1,1,1-Trichloroethane MR 18 SDWIS / CO0157011 / 2981
2016 Carbon tetrachloride MR 18 SDWIS / CO0157011 / 2982
2016 1,1,2-Trichloroethane MR 18 SDWIS / CO0157011 / 2985
2016 Tetrachloroethylene MR 18 SDWIS / CO0157011 / 2987
2016 Benzene MR 18 SDWIS / CO0157011 / 2990
2016 Vinyl chloride MR 18 SDWIS / CO0157011 / 2976
2016 Trichloroethylene MR 18 SDWIS / CO0157011 / 2984
2016 CHLOROBENZENE MR 18 SDWIS / CO0157011 / 2989
2016 Styrene MR 18 SDWIS / CO0157011 / 2996
2016 1,1-Dichloroethylene MR 18 SDWIS / CO0157011 / 2977

How Aldasoro Ranch Hoc Compares

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

Metric Aldasoro Ranch Hoc Colorado avg Federal benchmark
Total violations 389 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 13.9 Indicates a contaminant exceeded a federal MCL
PFAS detection None 60.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 412 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 Aldasoro Ranch Hoc water safe to drink? ▼
Aldasoro Ranch Hoc (PWS ID: CO0157011) has 389 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 412 people using Groundwater sources.
How many people does Aldasoro Ranch Hoc serve? ▼
Aldasoro Ranch Hoc serves 412 people in Telluride, Colorado. It is a Private-owned system using Groundwater water sources with 103 service connections.
What type of violations does Aldasoro Ranch Hoc have? ▼
Aldasoro Ranch Hoc has 389 total violations: 0 health-based violations (MCL exceedances or treatment failures), 387 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Aldasoro Ranch Hoc water? ▼
No PFAS testing data is available for Aldasoro Ranch Hoc under the EPA's UCMR5 monitoring program.
What water source does Aldasoro Ranch Hoc use? ▼
Aldasoro Ranch Hoc uses Groundwater 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.