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Transient Non-Community Water System · PWS CO0207785

Cu Mountain Research Station

Boulder, Colorado 80309 - drinking water served from surface water sources to 140 people, tracked in EPA SDWIS and UCMR5.

140
People served
57
EPA violations
32
Health-based
Untested
UCMR5 result

The verdict

EPA records 57 drinking-water violations at Cu Mountain Research Station, 56% of them health-based - below the Colorado per-system average.

57
Total EPA violations on record
56%
Health-based (MCL / treatment failure)
140
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cu Mountain Research Station

Cu Mountain Research Station is a local-owned transient non-community water system that delivers drinking water to 140 residents in Boulder, Colorado (Boulder County) through 10 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 57 total violations for this system , of which 32 (56%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 18 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 21 violations (TT, 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, 37 of 163 UCMR5-tested systems have reported PFAS detections (22.7%).

Cu Mountain Research Station's 57 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
140
Total Violations
57
Health-Based Violations
32
Water Source
Surface Water

System Details

System Type
Transient Non-Community
Owner Type
Local
Connections
10
County
Boulder
School/Daycare
No
MCL Violations
4
Monitoring Violations
18
Treatment Tech Violations
28

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 21 2024
E. COLI MR 12 2018
Revised Total Coliform Rule TT 4 2024
Coliform (TCR) MCL 4 2007
Coliform (TCR) MR 3 2007
Interim Enhanced Surface Water Treatment Rule TT 3 2015
Nitrate MR 3 2008

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 Cu Mountain Research Station.

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 CO0207785 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 Cu Mountain Research Station 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
2024 Surface Water Treatment Rule TT 21 SDWIS / CO0207785 / 0200
2024 Revised Total Coliform Rule TT 4 SDWIS / CO0207785 / 8000
2018 E. COLI MR 12 SDWIS / CO0207785 / 3014
2015 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / CO0207785 / 0300
2008 Nitrate MR 3 SDWIS / CO0207785 / 1040
2007 Coliform (TCR) MCL 4 SDWIS / CO0207785 / 3100
2007 Coliform (TCR) MR 3 SDWIS / CO0207785 / 3100

How Cu Mountain Research Station Compares

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

Metric Cu Mountain Research Station Colorado avg Federal benchmark
Total violations 57 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 32 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 140 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 Cu Mountain Research Station water safe to drink? ▼
Cu Mountain Research Station (PWS ID: CO0207785) has 57 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 140 people using Surface Water sources.
How many people does Cu Mountain Research Station serve? ▼
Cu Mountain Research Station serves 140 people in Boulder, Colorado. It is a Local-owned system using Surface Water water sources with 10 service connections.
What type of violations does Cu Mountain Research Station have? ▼
Cu Mountain Research Station has 57 total violations: 32 health-based violations (MCL exceedances or treatment failures), 18 monitoring/reporting violations, and 28 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cu Mountain Research Station water? ▼
No PFAS testing data is available for Cu Mountain Research Station under the EPA's UCMR5 monitoring program.
What water source does Cu Mountain Research Station use? ▼
Cu Mountain Research Station 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.