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Community Water System · PWS CO0162200

Dacono City Of

Dacono, Colorado 80514 - drinking water served from surface water sources to 6,900 people, tracked in EPA SDWIS and UCMR5.

6,900
People served
16
EPA violations
7
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 16 drinking-water violations at Dacono City Of, 44% of them health-based - below the Colorado per-system average.

16
Total EPA violations on record
44%
Health-based (MCL / treatment failure)
6,900
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Dacono City Of

Dacono City Of is a local-owned community water system that delivers drinking water to 6,900 residents in Dacono, Colorado (Weld County) through 2,420 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 16 total violations for this system , of which 7 (44%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 6 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Stage 1 Disinfectants and Disinfection Byproducts Rule, recorded in 4 violations (TT, health-based). 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%).

Dacono City Of's 16 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
6,900
Total Violations
16
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,420
County
Weld
School/Daycare
No
MCL Violations
3
Monitoring Violations
6
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 2022
Coliform (TCR) MCL 3 1995
TTHM MR 3 2016
Total Haloacetic Acids (HAA5) MR 3 2016
Public Notice Other 2 2022

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
PFTA 8/6/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 8/6/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/6/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 8/6/2024 <6.00 ppt 6.00 ppt Not Detected
4:2 FTS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 5/13/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 5/13/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 5/13/2024 <8.00 ppt 8.00 ppt Not Detected
9Cl-PF3ONS 5/13/2024 <2.00 ppt 2.00 ppt Not Detected
PFHpS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
NFDHA 5/13/2024 <20.00 ppt 20.00 ppt Not Detected
PFEESA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 5/13/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFDA 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/22/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 4/22/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 4/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 4/22/2024 <2.00 ppt 2.00 ppt Not Detected
PFHpA 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 4/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 4/22/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 4/22/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 4/22/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 4/22/2024 <20.00 ppt 20.00 ppt Not Detected
PFMBA 4/22/2024 <3.00 ppt 3.00 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 Dacono City 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 CO0162200 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 Dacono City 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
2022 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 4 SDWIS / CO0162200 / 0400
2022 Public Notice Other 2 SDWIS / CO0162200 / 7500
2016 TTHM MR 3 SDWIS / CO0162200 / 2950
2016 Total Haloacetic Acids (HAA5) MR 3 SDWIS / CO0162200 / 2456
1995 Coliform (TCR) MCL 3 SDWIS / CO0162200 / 3100

How Dacono City Of Compares

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

Metric Dacono City Of Colorado avg Federal benchmark
Total violations 16 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 6,900 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 Dacono City Of water safe to drink?
Dacono City Of (PWS ID: CO0162200) has 16 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 6,900 people using Surface Water sources.
How many people does Dacono City Of serve?
Dacono City Of serves 6,900 people in Dacono, Colorado. It is a Local-owned system using Surface Water water sources with 2,420 service connections.
What type of violations does Dacono City Of have?
Dacono City Of has 16 total violations: 7 health-based violations (MCL exceedances or treatment failures), 6 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Dacono City Of water?
No. Dacono City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Dacono City Of use?
Dacono City Of 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.
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.