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Carbondale, CO Tap Water Quality 2026

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

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

Main Utility: Carbondale Town Of PWSID: CO0123167 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.50 ppb, 10% of the action level and no violations are open. PFAS was sampled but not enough times for a compliance determination.

B

Carbondale earns a B for water quality

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

Lead: 1.50 ppb — 10% of the federal action level
PFAS sampled, too few results to judge
17 violations since 2015, 2 health-based
No violations currently open
Carbondale's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.50 ppb — 10% of the federal action level
✓ Lower lead than 69% of Colorado utilities
Population Served
6427
~1960 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
17 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
10% of EPA action level
1.50 ppb
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.
143.1% of EPA action level
1,860 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 1.50 ppb, 10% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2025 Resolved
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2025 Resolved
Di(2-ethylhexyl) phthalate MONITORING AND REPORTING — 0.006 mg/L 2025 Resolved
Di(2-ethylhexyl) adipate MONITORING AND REPORTING — 0.4 mg/L 2025 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2024 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2018 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
E. COLI MONITORING AND REPORTING — 0 2017 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2017–2019 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2017–2019 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2017–2019 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2017–2019 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2017–2019 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2017–2019 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

17 violations are on record since 2015, of which 2 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Carbondale Town Of
PWSID CO0123167
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 6,427
Service connections 1,960
Systems serving this area 3
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Carbondale tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.50 ppb, 10% of the action level.
Does Carbondale water have PFAS? ▼
It was sampled, but no sampling point had enough results for a compliance determination.
Who supplies water to Carbondale? ▼
Carbondale Town Of (PWSID CO0123167), one of 3 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2023-04-18. No significant deficiencies were recorded.

What Should Carbondale 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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