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Community Water System · PWS CO0111500

Guadalupe WA

Conejos, Colorado 81129 - drinking water served from groundwater sources to 42 people, tracked in EPA SDWIS and UCMR5.

42
People served
162
EPA violations
14
Health-based
Untested
UCMR5 result

The verdict

EPA records 162 drinking-water violations at Guadalupe WA, 9% of them health-based - above the Colorado per-system average.

162
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
42
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Guadalupe WA

Guadalupe WA is a private-owned community water system that delivers drinking water to 42 residents in Conejos, Colorado (Conejos County) through 17 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 162 total violations for this system , of which 14 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 130 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 Combined Radium (-226 and -228), recorded in 20 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%).

Guadalupe WA's 162 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
42
Total Violations
162
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
17
County
Conejos
School/Daycare
No
MCL Violations
0
Monitoring Violations
130
Treatment Tech Violations
14

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MR 20 2012
Gross Alpha, Excl. Radon and U MR 20 2012
Combined Uranium MR 20 2012
Lead and Copper Rule MR 19 2021
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 14 2022
Consumer Confidence Rule Other 11 2019
TTHM MR 11 2023
Total Haloacetic Acids (HAA5) MR 11 2023
Coliform (TCR) MR 10 2005
Nitrate MR 7 2014
Chlorine MR 6 2017
Dalapon MR 3 2002
Revised Total Coliform Rule MON 3 2017

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 Guadalupe WA.

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 CO0111500 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 Guadalupe WA 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 TTHM MR 11 SDWIS / CO0111500 / 2950
2023 Total Haloacetic Acids (HAA5) MR 11 SDWIS / CO0111500 / 2456
2022 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 14 SDWIS / CO0111500 / 0400
2021 Lead and Copper Rule MR 19 SDWIS / CO0111500 / 5000
2019 Consumer Confidence Rule Other 11 SDWIS / CO0111500 / 7000
2017 Chlorine MR 6 SDWIS / CO0111500 / 0999
2017 Revised Total Coliform Rule MON 3 SDWIS / CO0111500 / 8000
2014 Nitrate MR 7 SDWIS / CO0111500 / 1040
2012 Combined Radium (-226 and -228) MR 20 SDWIS / CO0111500 / 4010
2012 Gross Alpha, Excl. Radon and U MR 20 SDWIS / CO0111500 / 4000
2012 Combined Uranium MR 20 SDWIS / CO0111500 / 4006
2005 Coliform (TCR) MR 10 SDWIS / CO0111500 / 3100
2002 Dalapon MR 3 SDWIS / CO0111500 / 2031

How Guadalupe WA Compares

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

Metric Guadalupe WA Colorado avg Federal benchmark
Total violations 162 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 14 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 42 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 Guadalupe WA water safe to drink? ▼
Guadalupe WA (PWS ID: CO0111500) has 162 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 42 people using Groundwater sources.
How many people does Guadalupe WA serve? ▼
Guadalupe WA serves 42 people in Conejos, Colorado. It is a Private-owned system using Groundwater water sources with 17 service connections.
What type of violations does Guadalupe WA have? ▼
Guadalupe WA has 162 total violations: 14 health-based violations (MCL exceedances or treatment failures), 130 monitoring/reporting violations, and 14 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Guadalupe WA water? ▼
No PFAS testing data is available for Guadalupe WA under the EPA's UCMR5 monitoring program.
What water source does Guadalupe WA use? ▼
Guadalupe WA 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.