Koochiching County, Minnesota
12 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Within Koochiching County, 12 tracked ZIP codes reveal moderate water quality — national standards are generally met, with some documented exceptions.
How Koochiching County Compares
How Koochiching County Compares
Koochiching County scores 1 points above the Minnesota state average (62/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Koochiching County, Minnesota
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.5 (asthma 10.1%, diabetes 13.5%)
Estimated additional annual cost per homeowner: $660, driven primarily by energy_code_gap
Infrastructure: 0.345% avg pipe failure probability, 9% of ZIPs at high risk
57.3% 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: $660
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
7,334 housing units in Koochiching 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 Koochiching County
Remediation costs are relatively manageable for most homeowners in Koochiching 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 Koochiching 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 Koochiching County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Littlefork | 542 | 3 |
| 2 | Big Falls | 192 | 0 |
| 3 | International Falls | 5,637 | 0 |
| 4 | Ranier | 565 | 0 |
| 5 | Northome | 156 | 0 |
All ZIP Codes in Koochiching County
12 ZIP codes tracked in Koochiching County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 56627 | Big Falls | 83 | B | 0 | $63K |
| 2 | 56653 | Littlefork | 80 | B | 3 | $146K |
| 3 | 56649 | International Falls | 78 | B | 0 | $144K |
| 4 | 56668 | Ranier | 72 | B | 0 | $181K |
| 5 | 56669 | Kabetogama | 63 | C | 0 | $238K |
| 6 | 56681 | Squaw Lake | 63 | C | 0 | $177K |
| 7 | 56654 | Loman | 53 | D | 0 | $138K |
| 8 | 56658 | Margie | 53 | D | 0 | — |
| 9 | 56659 | Max | 53 | D | 0 | $342K |
| 10 | 56660 | Mizpah | 53 | D | 0 | $153K |
| 11 | 56679 | South International Falls | 53 | D | 0 | — |
| 12 | 56688 | Wirt | 53 | D | 0 | $172K |
Recommended Buyer Guides for Koochiching County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 57.3% of homes built before 1978
Deep Dive Reports
Detailed analysis for Koochiching County, Minnesota
Overview
Koochiching County in Minnesota covers 12 ZIP codes with an average Home Safety Score of C (63/100).
1 of 12 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Minnesota 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.