Bannock County, Idaho
11 ZIP codes · Avg score 79/100 · Grade B · Updated 2026-06-03
Covering 11 ZIP codes, Bannock County earns a high grade for tap water — most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Bannock County Compares
How Bannock County Compares
Bannock County scores 13 points above the Idaho state average (66/100) and 11 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Bannock County, Idaho
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.8 (asthma 11.2%, diabetes 9.7%)
Estimated additional annual cost per homeowner: $1,912, driven primarily by wildfire
Infrastructure: 0.378% avg pipe failure probability, 36% of ZIPs at high risk
63.7% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Bannock County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 7 violations. Past 5 years: 13 total (13 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: $1,912
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
35,945 housing units in Bannock 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 Bannock County
Remediation costs are relatively manageable for most homeowners in Bannock 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 Bannock 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 Bannock County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Pocatello | 58,231 | 6 |
| 2 | Tyhee and S and N Estates Water Assn | 300 | 6 |
| 3 | Caribou Acres | 150 | 6 |
| 4 | D and M Water Assn | 142 | 6 |
| 5 | Whitewater Subd | 106 | 6 |
13 total water systems serve Bannock County.
All ZIP Codes in Bannock County
11 ZIP codes tracked in Bannock County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 83202 | Pocatello | 83 | B | 1 | $301K |
| 2 | 83205 | Pocatello | 83 | B | 1 | — |
| 3 | 83206 | Pocatello | 83 | B | 1 | — |
| 4 | 83209 | Pocatello | 83 | B | 1 | — |
| 5 | 83246 | Lava Hot Springs | 83 | B | 1 | $359K |
| 6 | 83234 | Downey | 81 | B | 1 | $216K |
| 7 | 83250 | Mccammon | 79 | B | 2 | $296K |
| 8 | 83201 | Pocatello | 78 | B | 1 | $256K |
| 9 | 83204 | Pocatello | 78 | B | 1 | $233K |
| 10 | 83245 | Inkom | 75 | B | 3 | $301K |
| 11 | 83214 | Arimo | 59 | C | 2 (1 health) | $251K |
Recommended Buyer Guides for Bannock 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 — 63.7% of homes built before 1978
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Bannock County, Idaho
Overview
Bannock County in Idaho covers 11 ZIP codes with an average Home Safety Score of B (79/100).
11 of 11 ZIP codes have recorded EPA violations. 1 health-based violation 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.