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Community Water System · PWS CO0105900

Walsh Town Of

Walsh, Colorado 81090 - drinking water served from groundwater sources to 650 people, tracked in EPA SDWIS and UCMR5.

650
People served
140
EPA violations
79
Health-based
Untested
UCMR5 result

The verdict

EPA records 140 drinking-water violations at Walsh Town Of, 56% of them health-based - above the Colorado per-system average.

140
Total EPA violations on record
56%
Health-based (MCL / treatment failure)
650
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walsh Town Of

Walsh Town Of is a local-owned community water system that delivers drinking water to 650 residents in Walsh, Colorado (Baca County) through 355 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 140 total violations for this system , of which 79 (56%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 47 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 Combined Radium (-226 and -228), recorded in 36 violations (MCL, health-based). 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%).

Walsh Town Of's 140 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
650
Total Violations
140
Health-Based Violations
79
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
355
County
Baca
School/Daycare
No
MCL Violations
71
Monitoring Violations
47
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 36 2025
Nitrate MCL 31 2025
Groundwater Rule TT 8 2018
Lead and Copper Rule MR 7 2019
Revised Total Coliform Rule Other 7 2023
Coliform (TCR) MR 6 2008
Fluoride MR 4 2007
Public Notice Other 4 2025
Coliform (TCR) MCL 4 2007
Atrazine MR 4 2010
Chlorine MR 3 2008
Nitrate MR 3 1993
Consumer Confidence Rule Other 2 2004
Arsenic MR 2 2007
Barium MR 2 2007
Chromium MR 2 2007
Mercury MR 2 2007
Thallium, Total MR 2 2007
Beryllium, Total MR 2 2007
Antimony, Total MR 2 2007
Cadmium MR 2 2007
Selenium MR 2 2007
Nickel MR 2 2007

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 Walsh Town Of.

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 CO0105900 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 Walsh Town Of 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 Combined Radium (-226 and -228) MCL 36 SDWIS / CO0105900 / 4010
2025 Nitrate MCL 31 SDWIS / CO0105900 / 1040
2025 Public Notice Other 4 SDWIS / CO0105900 / 7500
2023 Revised Total Coliform Rule Other 7 SDWIS / CO0105900 / 8000
2019 Lead and Copper Rule MR 7 SDWIS / CO0105900 / 5000
2018 Groundwater Rule TT 8 SDWIS / CO0105900 / 0700
2010 Atrazine MR 4 SDWIS / CO0105900 / 2050
2008 Coliform (TCR) MR 6 SDWIS / CO0105900 / 3100
2008 Chlorine MR 3 SDWIS / CO0105900 / 0999
2007 Fluoride MR 4 SDWIS / CO0105900 / 1025
2007 Coliform (TCR) MCL 4 SDWIS / CO0105900 / 3100
2007 Arsenic MR 2 SDWIS / CO0105900 / 1005
2007 Barium MR 2 SDWIS / CO0105900 / 1010
2007 Chromium MR 2 SDWIS / CO0105900 / 1020
2007 Mercury MR 2 SDWIS / CO0105900 / 1035

How Walsh Town Of Compares

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

Metric Walsh Town Of Colorado avg Federal benchmark
Total violations 140 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 79 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 650 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 Walsh Town Of water safe to drink? ▼
Walsh Town Of (PWS ID: CO0105900) has 140 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 650 people using Groundwater sources.
How many people does Walsh Town Of serve? ▼
Walsh Town Of serves 650 people in Walsh, Colorado. It is a Local-owned system using Groundwater water sources with 355 service connections.
What type of violations does Walsh Town Of have? ▼
Walsh Town Of has 140 total violations: 79 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walsh Town Of water? ▼
No PFAS testing data is available for Walsh Town Of under the EPA's UCMR5 monitoring program.
What water source does Walsh Town Of use? ▼
Walsh Town Of 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.