Liberty Lake, WA: High Radon Risk — 70/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-04
Although water quality varies across any metro, Liberty Lake's systems collectively post above-average compliance scores for WA — and documented violations are few.
How Liberty Lake Compares
Data: EPA SDWIS Last verified: 2026-06-04
What You Should Know About Liberty Lake Water
- Average lead level: 0.0015 mg/L.
- Homes built before 1986: 19% — older plumbing may contain lead solder.
- Estimated remediation: $2,900 per household.
- CDC health risk index: 12.04 — above typical levels.
Who Supplies Your Water in Liberty Lake
Federal drinking water records identify 2 systems in Liberty Lake, WA. The leading 2 providers serve the largest share of residential connections, each operating as a separate entity with its own rate authority, infrastructure management, and EPA compliance obligations — so service conditions are not uniform city-wide.
Overview
We track water quality and home safety data for 1 ZIP code in Liberty Lake, Washington (population ~12,092), covering 2 community water systems serving approximately 35,432 people region-wide.
No EPA violations recorded across any ZIP codes in Liberty Lake — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Liberty Lake: B (70/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Liberty Lake water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0015 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 99019 | B | Liberty Lake Sewer & Water District | 14,212 |
All ZIP Codes in Liberty Lake
- 99019 [B]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Liberty Lake
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in Liberty Lake
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
For most of Liberty Lake's housing stock, construction occurred after 1986 — when lead solder in plumbing was federally prohibited. The median build year of 1991 broadly reflects that newer profile.
Most homes in Liberty Lake were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Liberty Lake Homeowners
When estimated remediation is placed alongside median property values in Liberty Lake, the resulting ratio is low — a finding consistent with a household financial perspective where documented issues can be addressed without a meaningful impact on overall equity position, making this market one of the more favorable contexts for remediation planning.
Remediation costs in Liberty Lake are relatively low compared to home values. The $1,900–$4,100 estimated range is a small fraction of median property value. Home values are 19% above the Washington average.
Lead Exposure Risk for Children in Liberty Lake
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Where pre-rule stock represents a smaller fraction of the inventory — 19% across Liberty Lake — the structural drivers of household exposure run thinner. Aggregate readings under the federal benchmark reinforce that picture, with one-home draws remaining the only direct measurement for a specific address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Liberty Lake
Multiple flood events have been recorded for Liberty Lake through the NFIP — 1 claim in total, with 100% of ZIP codes in FEMA-designated zones — pointing to a flood exposure profile that merits inclusion in a water quality assessment without reaching high-severity planning territory.
Liberty Lake has a moderate flood history with 1 FEMA claims averaging $3,237 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$2,900</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Liberty Lake, WA