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Liberty Lake, WA Tap Water Quality 2026

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

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

Main Utility: Liberty Lake Sewer & Water District PWSID: WA5347150 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.50 ppb, 10% of the action level and no violations are open. No PFAS was detected.

A

Liberty Lake earns an A for water quality

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

Lead: 1.50 ppb — 10% of the federal action level
PFAS tested, none detected
No violations since 2015
No violations currently open
Liberty Lake's lead level vs. all Washington community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.50 ppb — 10% of the federal action level
✓ Lower lead than 75% of Washington utilities
Population Served
9964
~5598 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
None on record since 2015

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
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.

Contaminant Violations (2015–Present)

✓ No violations on record for this water system.
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

No violations are on record for this system since 2015. EPA records violations for every community water system, so this reflects a clean compliance history rather than missing data.

About the Main Water System

Utility Liberty Lake Sewer & Water District
PWSID WA5347150
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 9,964
Service connections 5,598
Systems serving this area 2
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Liberty Lake 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 Liberty Lake water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Liberty Lake? ▼
Liberty Lake Sewer & Water District (PWSID WA5347150), one of 2 systems serving this area. Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2020-10-13. No significant deficiencies were recorded.

What Should Liberty Lake 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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