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Community Water System · PWS CO0125155

Columbine Lake WSD

Grand Lake, Colorado 80447 - drinking water served from groundwater sources to 428 people, tracked in EPA SDWIS and UCMR5.

428
People served
48
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 48 drinking-water violations at Columbine Lake WSD - below the Colorado per-system average.

48
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
428
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Columbine Lake WSD

Columbine Lake WSD is a local-owned community water system that delivers drinking water to 428 residents in Grand Lake, Colorado (Grand County) through 463 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 48 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 46 monitoring and reporting violations are on file. The most recent violation on record dates to 2007.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 7 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%).

Columbine Lake WSD's 48 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
428
Total Violations
48
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
463
County
Grand
School/Daycare
No
MCL Violations
0
Monitoring Violations
46
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 7 2004
Nitrate MR 4 2007
TTHM MR 4 2007
Total Haloacetic Acids (HAA5) MR 4 2007
Lead and Copper Rule MR 3 2005
Consumer Confidence Rule Other 2 2006
Nitrite MR 2 2006
Fluoride MR 2 2007
Arsenic MR 2 2007
Barium MR 2 2007
Cadmium MR 2 2007
Mercury MR 2 2007
Antimony, Total MR 2 2007
Thallium, Total MR 2 2007
Chromium MR 2 2007
Beryllium, Total MR 2 2007
Nickel MR 2 2007
Selenium 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 Columbine Lake WSD.

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 CO0125155 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 Columbine Lake WSD 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
2007 Nitrate MR 4 SDWIS / CO0125155 / 1040
2007 TTHM MR 4 SDWIS / CO0125155 / 2950
2007 Total Haloacetic Acids (HAA5) MR 4 SDWIS / CO0125155 / 2456
2007 Fluoride MR 2 SDWIS / CO0125155 / 1025
2007 Arsenic MR 2 SDWIS / CO0125155 / 1005
2007 Barium MR 2 SDWIS / CO0125155 / 1010
2007 Cadmium MR 2 SDWIS / CO0125155 / 1015
2007 Mercury MR 2 SDWIS / CO0125155 / 1035
2007 Antimony, Total MR 2 SDWIS / CO0125155 / 1074
2007 Thallium, Total MR 2 SDWIS / CO0125155 / 1085
2007 Chromium MR 2 SDWIS / CO0125155 / 1020
2007 Beryllium, Total MR 2 SDWIS / CO0125155 / 1075
2007 Nickel MR 2 SDWIS / CO0125155 / 1036
2007 Selenium MR 2 SDWIS / CO0125155 / 1045
2006 Consumer Confidence Rule Other 2 SDWIS / CO0125155 / 7000

How Columbine Lake WSD Compares

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

Metric Columbine Lake WSD Colorado avg Federal benchmark
Total violations 48 108.9 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 428 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 Columbine Lake WSD water safe to drink? ▼
Columbine Lake WSD (PWS ID: CO0125155) has 48 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 428 people using Groundwater sources.
How many people does Columbine Lake WSD serve? ▼
Columbine Lake WSD serves 428 people in Grand Lake, Colorado. It is a Local-owned system using Groundwater water sources with 463 service connections.
What type of violations does Columbine Lake WSD have? ▼
Columbine Lake WSD has 48 total violations: 0 health-based violations (MCL exceedances or treatment failures), 46 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Columbine Lake WSD water? ▼
No PFAS testing data is available for Columbine Lake WSD under the EPA's UCMR5 monitoring program.
What water source does Columbine Lake WSD use? ▼
Columbine Lake WSD 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.