Bonner County, Idaho
15 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-07-16
ZipCheckup grade for Bonner: C.
A mixed picture - some signals here are worth your attention.
Water safety in Bonner County is uneven - some of its 15 ZIP codes meet standards cleanly while others carry documented violations.
How Bonner County Compares
How Bonner County Compares
Bonner County scores 9 points below the Idaho state average (66/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-16
ZIP Code Risk Map
Water Quality Map: Bonner County, Idaho
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 10.7%, diabetes 11.8%)
Estimated additional annual cost per homeowner: $939, driven primarily by flood
Infrastructure: 0.329% avg pipe failure probability, 13% of ZIPs at high risk
42.5% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Bonner County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 9 violations. Past 5 years: 21 total (21 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $939
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
24,963 housing units in Bonner 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 Bonner County
Remediation costs are relatively manageable for most homeowners in Bonner 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 Bonner County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Bonner County
8 community water systems serving Bonner County.
- D
- C
- C
- C
- C
- C
Show all 8 water systems
- C
- C
22 total water systems serve Bonner County.
Systems with the most violations in Bonner County
5 water systems with recorded EPA violations.
- D
- C
- C
- C
- C
All ZIP Codes in Bonner County
15 ZIP codes tracked in Bonner County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 83852 | Ponderay | 70 | B | 0 | $381K |
| 2 | 83821 | Coolin | 69 | C | 2 | $574K |
| 3 | 83860 | Sagle | 68 | C | 1 | $508K |
| 4 | 83811 | Clark Fork | 66 | C | 0 | $235K |
| 5 | 83856 | Priest River | 66 | C | 3 | $374K |
| 6 | 83864 | Sandpoint | 64 | C | 5 (1 health) | $474K |
| 7 | 83804 | Blanchard | 62 | C | 2 | $282K |
| 8 | 83836 | Hope | 58 | C | 4 | $534K |
| 9 | 83813 | Cocolalla | 53 | D | 0 | $560K |
| 10 | 83822 | Oldtown | 53 | D | 0 | $374K |
| 11 | 83841 | Laclede | 53 | D | 0 | $337K |
| 12 | 83825 | Dover | 46 | D | 2 (1 health) | $594K |
| 13 | 83840 | Kootenai | 40 | D | 0 | $287K |
| 14 | 83848 | Nordman | 40 | D | 0 | $812K |
| 15 | 83865 | Colburn | 40 | D | 0 | — |
Recommended Buyer Guides for Bonner County
Retailer arrangements don't shape what appears here - the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Bonner County, Idaho
Overview
Bonner County in Idaho covers 15 ZIP codes with an average Home Safety Score of C (57/100).
7 of 15 ZIP codes have recorded EPA violations. 2 health-based violations have been documented.
← Back to Idaho 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.