Lincoln County, Washington
12 ZIP codes · Avg score 69/100 · Grade C · Updated 2026-06-03
Lincoln County shows moderate water quality across its 12 ZIP codes — some areas carry violations worth monitoring.
How Lincoln County Compares
How Lincoln County Compares
Lincoln County scores 9 points below the Washington state average (78/100) and 1 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Lincoln County, Washington
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.5 (asthma 11.3%, diabetes 11.5%)
Estimated additional annual cost per homeowner: $1,128, driven primarily by energy_code_gap
Infrastructure: 0.398% avg pipe failure probability, 50% of ZIPs at high risk
68.7% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,128
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,458 housing units in Lincoln County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Lincoln County
Remediation costs are relatively manageable for most homeowners in Lincoln County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Lincoln County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Lincoln County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | SPOKANE CITY OF | 343,167 | 6 |
| 2 | Clear Lake Water Users Assn | 182 | 6 |
| 3 | Spokane Hutterian Brethren | 140 | 6 |
| 4 | City of Sprague | 570 | 6 |
| 5 | Davenport Water Division | 1,720 | 3 |
11 total water systems serve Lincoln County.
All ZIP Codes in Lincoln County
12 ZIP codes tracked in Lincoln County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99008 | Edwall | 83 | B | 1 | $453K |
| 2 | 99103 | Almira | 83 | B | 1 | $225K |
| 3 | 99185 | Wilbur | 83 | B | 1 | $249K |
| 4 | 99159 | Odessa | 82 | B | 3 | $202K |
| 5 | 99122 | Davenport | 80 | B | 3 | $316K |
| 6 | 99029 | Reardan | 79 | B | 6 | $379K |
| 7 | 99032 | Sprague | 77 | B | 6 | $141K |
| 8 | 99012 | Fairfield | 53 | D | 0 | $289K |
| 9 | 99018 | Latah | 53 | D | 0 | $310K |
| 10 | 99117 | Creston | 53 | D | 0 | $254K |
| 11 | 99134 | Harrington | 53 | D | 0 | $266K |
| 12 | 99147 | Lincoln | 53 | D | 0 | $417K |
Recommended Buyer Guides for Lincoln County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 68.7% of homes built before 1978
Deep Dive Reports
Detailed analysis for Lincoln County, Washington
Overview
Lincoln County in Washington covers 12 ZIP codes with an average Home Safety Score of C (69/100).
7 of 12 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Washington water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.