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Community Water System · PWS CO0110020

Idaho Springs City Of

Idaho Springs, Colorado 80452 - drinking water served from surface water sources to 10,432 people, tracked in EPA SDWIS and UCMR5.

10,432
People served
125
EPA violations
89
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 125 drinking-water violations at Idaho Springs City Of, 71% of them health-based - above the Colorado per-system average.

125
Total EPA violations on record
71%
Health-based (MCL / treatment failure)
10,432
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Idaho Springs City Of

Idaho Springs City Of is a local-owned community water system that delivers drinking water to 10,432 residents in Idaho Springs, Colorado (Clear Creek County) through 951 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 125 total violations for this system , of which 89 (71%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 20 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 74 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%).

Idaho Springs City Of's 125 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
10,432
Total Violations
125
Health-Based Violations
89
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
951
County
Clear Creek
School/Daycare
No
MCL Violations
15
Monitoring Violations
20
Treatment Tech Violations
74

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 74 2004
Total Haloacetic Acids (HAA5) MCL 15 2007
Interim Enhanced Surface Water Treatment Rule MR 9 2023
Surface Water Treatment Rule MR 8 2023
Public Notice Other 6 2024
Lead and Copper Rule MR 3 2025
LEAD AND COPPER RULE REVISIONS RPT 3 2025

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
PFEESA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 7/8/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 7/8/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 7/8/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/8/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 7/8/2024 <6.00 ppt 6.00 ppt Not Detected
PFNA 7/8/2024 <4.00 ppt 4.00 ppt Not Detected
PFMPA 7/8/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 7/8/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 7/8/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/8/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 7/8/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 7/8/2024 <2.00 ppt 2.00 ppt Not Detected
PFHpA 7/8/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
6:2 FTS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFOS 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFNA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFDoA 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/3/2024 <2.00 ppt 2.00 ppt Not Detected
8:2 FTS 6/3/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 6/3/2024 <2.00 ppt 2.00 ppt Not Detected
PFHpS 6/3/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 6/3/2024 <4.00 ppt 4.00 ppt Not Detected
NFDHA 6/3/2024 <20.00 ppt 20.00 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 Idaho Springs 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 CO0110020 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 Idaho Springs 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
2025 Lead and Copper Rule MR 3 SDWIS / CO0110020 / 5000
2025 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / CO0110020 / 5200
2024 Public Notice Other 6 SDWIS / CO0110020 / 7500
2023 Interim Enhanced Surface Water Treatment Rule MR 9 SDWIS / CO0110020 / 0300
2023 Surface Water Treatment Rule MR 8 SDWIS / CO0110020 / 0200
2007 Total Haloacetic Acids (HAA5) MCL 15 SDWIS / CO0110020 / 2456
2004 Surface Water Treatment Rule TT 74 SDWIS / CO0110020 / 0200

How Idaho Springs City Of Compares

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

Metric Idaho Springs City Of Colorado avg Federal benchmark
Total violations 125 108.9 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 89 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 10,432 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 Idaho Springs City Of water safe to drink?
Idaho Springs City Of (PWS ID: CO0110020) has 125 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 10,432 people using Surface Water sources.
How many people does Idaho Springs City Of serve?
Idaho Springs City Of serves 10,432 people in Idaho Springs, Colorado. It is a Local-owned system using Surface Water water sources with 951 service connections.
What type of violations does Idaho Springs City Of have?
Idaho Springs City Of has 125 total violations: 89 health-based violations (MCL exceedances or treatment failures), 20 monitoring/reporting violations, and 74 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Idaho Springs City Of water?
No. Idaho Springs City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Idaho Springs City Of use?
Idaho Springs 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.