PlainWater
States → Colorado

Community Water System · PWS CO0143755

Tri County Wcd

Montrose, Colorado 81401 - drinking water served from surface water sources to 20,490 people, tracked in EPA SDWIS and UCMR5.

20,490
People served
8
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 8 drinking-water violations at Tri County Wcd - below the Colorado per-system average.

8
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
20,490
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tri County Wcd

Tri County Wcd is a local-owned community water system that delivers drinking water to 20,490 residents in Montrose, Colorado (Montrose County) through 8,046 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 8 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 2 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 Consumer Confidence Rule, recorded in 3 violations (Other). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Tri County Wcd's 8 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
20,490
Total Violations
8
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
8,046
County
Montrose
School/Daycare
No
MCL Violations
0
Monitoring Violations
2
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 3 2016
Coliform (TCR) MR 2 2007

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 9/18/2023 <2.00 ppt 2.00 ppt Not Detected
PFOA 9/18/2023 <4.00 ppt 4.00 ppt Not Detected
ADONA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 9/18/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFOS 9/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 9/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 9/18/2023 <20.00 ppt 20.00 ppt Not Detected
PFPeS 9/18/2023 <4.00 ppt 4.00 ppt Not Detected
PFMPA 9/18/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 9/18/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 9/18/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 9/18/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 9/18/2023 <6.00 ppt 6.00 ppt Not Detected
PFHpS 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 9/18/2023 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 6/6/2023 <7.00 ppt 7.00 ppt Not Detected
PFMPA 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFMBA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 6/6/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 6/6/2023 <8.00 ppt 8.00 ppt Not Detected
PFPeA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/6/2023 <6.00 ppt 6.00 ppt Not Detected
PFBS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/6/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 6/6/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/6/2023 <2.00 ppt 2.00 ppt Not Detected
PFNA 6/6/2023 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 6/6/2023 <5.00 ppt 5.00 ppt Not Detected

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 Tri County Wcd.

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 CO0143755 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 Tri County Wcd 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 Consumer Confidence Rule Other 3 SDWIS / CO0143755 / 7000
2007 Coliform (TCR) MR 2 SDWIS / CO0143755 / 3100

How Tri County Wcd Compares

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

Metric Tri County Wcd Colorado avg Federal benchmark
Total violations 8 108.9 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 20,490 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 Tri County Wcd water safe to drink? ▼
Tri County Wcd (PWS ID: CO0143755) has 8 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 20,490 people using Surface Water sources.
How many people does Tri County Wcd serve? ▼
Tri County Wcd serves 20,490 people in Montrose, Colorado. It is a Local-owned system using Surface Water water sources with 8,046 service connections.
What type of violations does Tri County Wcd have? ▼
Tri County Wcd has 8 total violations: 0 health-based violations (MCL exceedances or treatment failures), 2 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tri County Wcd water? ▼
No. Tri County Wcd was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Tri County Wcd use? ▼
Tri County Wcd uses Surface Water 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.