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Lafayette, CO Tap Water Quality 2026

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

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

Main Utility: Lafayette City Of PWSID: CO0107473 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 2.00 ppb, 13% of the action level and no violations are open. No PFAS was detected.

A

Lafayette earns an A for water quality

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

Lead: 2.00 ppb — 13% of the federal action level
PFAS tested, none detected
25 violations since 2015, 0 health-based
No violations currently open
Lafayette's lead level vs. all Colorado community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 63% of Colorado utilities
Population Served
30191
~9666 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
25 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% 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
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2025 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2025 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2025 Resolved
Revised Total Coliform Rule REPORTING FAILURE — — 2025 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2025 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2020 Resolved
Revised Total Coliform Rule OTHER — — 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
E. COLI MONITORING AND REPORTING — 0 2017 Resolved
E. COLI MONITORING AND REPORTING — 0 2017 Resolved
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2017 Resolved
Barium MONITORING AND REPORTING — 2 mg/L 2017 Resolved
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2017 Resolved
Chromium MONITORING AND REPORTING — 0.1 mg/L 2017 Resolved
Mercury MONITORING AND REPORTING — 0.002 mg/L 2017 Resolved
Nickel MONITORING AND REPORTING — — 2017 Resolved
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2017 Resolved
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2017 Resolved
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2017 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2017 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
E. COLI MONITORING AND REPORTING — 0 2016 Resolved
TTHM MONITORING AND REPORTING — 0.080 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

25 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 Lafayette City Of
PWSID CO0107473
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 30,191
Service connections 9,666
Systems serving this area 5
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Lafayette tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 2.00 ppb, 13% of the action level.
Does Lafayette water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Lafayette? ▼
Lafayette City Of (PWSID CO0107473), one of 5 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 2024-12-17. Inspectors recorded 1 significant deficiency.

What Should Lafayette 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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