States ›Colorado ›Weld County ›Windsor

Windsor, CO Tap Water Quality 2026

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

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

Main Utility: Windsor Town Of PWSID: CO0162843 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 5.80 ppb, 39% of the action level and no violations are open. No PFAS was detected.

A

Windsor earns an A for water quality

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

Lead: 5.80 ppb — 39% of the federal action level
PFAS tested, none detected
3 violations since 2015, 0 health-based
No violations currently open
Windsor's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 5.80 ppb — 39% of the federal action level
✓ Lower lead than 15% of Colorado utilities
Population Served
24758
~9418 connections
Water Source
Surface water
Purchased from another system — SDWIS source code SWP
Active Violations
0
3 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
39% of EPA action level
5.80 ppb
Action level: 15 ppb
The 90th-percentile lead result is 5.80 ppb, 39% 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
Public Notice OTHER — — 2023 Resolved
Revised Total Coliform Rule OTHER — — 2022 Resolved
Public Notice OTHER — — 2020 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

3 violations are on record since 2015, of which 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Windsor Town Of
PWSID CO0162843
Water source Surface water — Purchased from another system — SDWIS source code SWP
Population served 24,758
Service connections 9,418
Systems serving this area 6
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Windsor tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 5.80 ppb, 39% of the action level.
Does Windsor water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Windsor? ▼
Windsor Town Of (PWSID CO0162843), one of 6 systems serving this area. Surface water. Purchased from another system — SDWIS source code SWP
When was this system last inspected? ▼
It was last inspected on 2023-04-17. No significant deficiencies were recorded.

What Should Windsor Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
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.

Nearby Cities in Colorado

Greeley, Co Tap Water Quality 2026 Weld Erie, Co Tap Water Quality 2026 Weld Johnstown, Co Tap Water Quality 2026 Weld Evans, Co Tap Water Quality 2026 Weld Firestone, Co Tap Water Quality 2026 Weld Frederick, Co Tap Water Quality 2026 Weld