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Community Water System · PWS CO0115185

Coalby Domestic WC

Cedaredge, Colorado 81413 - drinking water served from surface water sources to 239 people, tracked in EPA SDWIS and UCMR5.

239
People served
929
EPA violations
156
Health-based
Untested
UCMR5 result

The verdict

EPA records 929 drinking-water violations at Coalby Domestic WC, 17% of them health-based - above the Colorado per-system average.

929
Total EPA violations on record
17%
Health-based (MCL / treatment failure)
239
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Coalby Domestic WC

Coalby Domestic WC is a private-owned community water system that delivers drinking water to 239 residents in Cedaredge, Colorado (Delta County) through 128 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 929 total violations for this system , of which 156 (17%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 762 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 Surface Water Treatment Rule, recorded in 145 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, 98 of 163 UCMR5-tested systems have reported PFAS detections (60.1%).

Coalby Domestic WC's 929 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
239
Total Violations
929
Health-Based Violations
156
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
128
County
Delta
School/Daycare
No
MCL Violations
4
Monitoring Violations
762
Treatment Tech Violations
152

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 145 2022
Surface Water Treatment Rule MR 69 2022
Interim Enhanced Surface Water Treatment Rule MR 55 2021
1,2,4-Trichlorobenzene MR 27 2021
Vinyl chloride MR 27 2021
1,1-Dichloroethylene MR 27 2021
trans-1,2-Dichloroethylene MR 27 2021
1,2-Dichloroethane MR 27 2021
1,2-Dichloropropane MR 27 2021
Trichloroethylene MR 27 2021
1,1,2-Trichloroethane MR 27 2021
Benzene MR 27 2021
Toluene MR 27 2021
cis-1,2-Dichloroethylene MR 27 2021
Xylenes, Total MR 27 2021
o-Dichlorobenzene MR 27 2021
p-Dichlorobenzene MR 27 2021
Carbon tetrachloride MR 27 2021
CHLOROBENZENE MR 27 2021
Ethylbenzene MR 27 2021
1,1,1-Trichloroethane MR 27 2021
DICHLOROMETHANE MR 27 2021
Tetrachloroethylene MR 27 2021
Styrene MR 27 2021
Lead and Copper Rule MR 16 2021
TTHM MR 12 2020
Total Haloacetic Acids (HAA5) MR 12 2020
Coliform (TCR) MR 10 2004
Revised Total Coliform Rule MON 9 2020
Consumer Confidence Rule Other 8 2021

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 Coalby Domestic WC.

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 CO0115185 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 Coalby Domestic WC 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 Surface Water Treatment Rule TT 145 SDWIS / CO0115185 / 0200
2022 Surface Water Treatment Rule MR 69 SDWIS / CO0115185 / 0200
2022 Interim Enhanced Surface Water Treatment Rule TT 7 SDWIS / CO0115185 / 0300
2021 Interim Enhanced Surface Water Treatment Rule MR 55 SDWIS / CO0115185 / 0300
2021 1,2,4-Trichlorobenzene MR 27 SDWIS / CO0115185 / 2378
2021 Vinyl chloride MR 27 SDWIS / CO0115185 / 2976
2021 1,1-Dichloroethylene MR 27 SDWIS / CO0115185 / 2977
2021 trans-1,2-Dichloroethylene MR 27 SDWIS / CO0115185 / 2979
2021 1,2-Dichloroethane MR 27 SDWIS / CO0115185 / 2980
2021 1,2-Dichloropropane MR 27 SDWIS / CO0115185 / 2983
2021 Trichloroethylene MR 27 SDWIS / CO0115185 / 2984
2021 1,1,2-Trichloroethane MR 27 SDWIS / CO0115185 / 2985
2021 Benzene MR 27 SDWIS / CO0115185 / 2990
2021 Toluene MR 27 SDWIS / CO0115185 / 2991
2021 cis-1,2-Dichloroethylene MR 27 SDWIS / CO0115185 / 2380

How Coalby Domestic WC Compares

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

Metric Coalby Domestic WC Colorado avg Federal benchmark
Total violations 929 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 156 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 239 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 Coalby Domestic WC water safe to drink? ▼
Coalby Domestic WC (PWS ID: CO0115185) has 929 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 239 people using Surface Water sources.
How many people does Coalby Domestic WC serve? ▼
Coalby Domestic WC serves 239 people in Cedaredge, Colorado. It is a Private-owned system using Surface Water water sources with 128 service connections.
What type of violations does Coalby Domestic WC have? ▼
Coalby Domestic WC has 929 total violations: 156 health-based violations (MCL exceedances or treatment failures), 762 monitoring/reporting violations, and 152 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Coalby Domestic WC water? ▼
No PFAS testing data is available for Coalby Domestic WC under the EPA's UCMR5 monitoring program.
What water source does Coalby Domestic WC use? ▼
Coalby Domestic WC 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. 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.