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Clifton, CO Tap Water Quality 2026

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

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

Main Utility: Clifton Wd PWSID: CO0139180 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.20 ppb, 15% of the action level and no violations are open. No PFAS was detected.

B

Clifton earns a B for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 2.20 ppb — 15% of the federal action level
PFAS tested, none detected
5 violations since 2015, 1 health-based
No violations currently open
Clifton's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.20 ppb — 15% of the federal action level
✓ Lower lead than 40% of Colorado utilities
Population Served
10212
~12297 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
5 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
15% of EPA action level
2.20 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.20 ppb, 15% 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.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Turbidity MONITORING AND REPORTING — TT 2016 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
Cryptosporidium MONITORING AND REPORTING — — 2016 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

5 violations are on record since 2015, of which 1 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Clifton Wd
PWSID CO0139180
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 10,212
Service connections 12,297
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Clifton tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.20 ppb, 15% of the action level.
Does Clifton water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Clifton? ▼
Clifton Wd (PWSID CO0139180), one of 2 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 2024-02-13. Inspectors recorded 1 significant deficiency.

What Should Clifton 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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