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Somerset, CO Tap Water Quality 2026

Water quality report for Somerset, CO — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Somerset's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Somerset Domestic Wd PWSID: CO0126715 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS has never been sampled at this system.

C

Somerset earns a C for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: not detected
PFAS never sampled at this system
39 violations since 2015, 20 health-based
No violations currently open
Somerset's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Colorado utilities
Population Served
6
~63 connections
Water Source
Surface water
Groundwater under the direct influence of surface water — SDWIS source code GU
Active Violations
0
39 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
166.2% of EPA action level
2,160 ppb
Action level: 1,300 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MONITORING AND REPORTING — 0.080 mg/L 2026 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2026 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Public Notice OTHER — — 2024 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Revised Total Coliform Rule OTHER — — 2024 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2023 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2023 Resolved
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2023 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2021 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
TTHM MCL EXCEEDANCE 0.0894 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.10224 MG/L 0.080 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.0931 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.095 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.092 MG/L 0.080 mg/L 2019 Resolved
TTHM MCL EXCEEDANCE 0.0859 MG/L 0.080 mg/L 2018 Resolved
Public Notice OTHER — — 2018 Resolved
TTHM MCL EXCEEDANCE 0.115 MG/L 0.080 mg/L 2018 Resolved
TTHM MCL EXCEEDANCE 0.123 MG/L 0.080 mg/L 2018 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.149 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.152 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.133 MG/L 0.080 mg/L 2017 Resolved
Public Notice OTHER — — 2017 Resolved
TTHM MCL EXCEEDANCE 0.135 MG/L 0.080 mg/L 2017 Resolved
TTHM MCL EXCEEDANCE 0.12698 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.10038 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.123 MG/L 0.080 mg/L 2016 Resolved
TTHM MCL EXCEEDANCE 0.093 MG/L 0.080 mg/L 2016 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

39 violations are on record since 2015, of which 20 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Somerset Domestic Wd
PWSID CO0126715
Water source Surface water — Groundwater under the direct influence of surface water — SDWIS source code GU
Population served 6
Service connections 63
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Somerset tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Somerset water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Somerset? ▼
Somerset Domestic Wd (PWSID CO0126715). Surface water. Groundwater under the direct influence of surface water — SDWIS source code GU
When was this system last inspected? ▼
It was last inspected on 2024-05-29. Inspectors recorded 1 significant deficiency.

What Should Somerset Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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