McLean County, North Dakota
11 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-03
Unlike top-rated counties, McLean County's 11 ZIP codes carry a fair number of documented violations — chlorine compliance and disinfection byproduct limits are the categories most often cited in recent data.
How McLean County Compares
How McLean County Compares
McLean County scores 1 points above the North Dakota state average (56/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: McLean County, North Dakota
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.1 (asthma 9.9%, diabetes 12.1%)
Estimated additional annual cost per homeowner: $468, driven primarily by energy_code_gap
Infrastructure: 0.375% avg pipe failure probability, 36% of ZIPs at high risk
67.3% 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: $468
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,377 housing units in McLean 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 McLean County
Remediation costs are relatively manageable for most homeowners in McLean 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 McLean 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 McLean County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Coleharbor | 79 | 5 |
| 2 | Garrison Rural Water District | 1,805 | 1 |
| 3 | City of Garrison | 1,453 | 1 |
| 4 | City of Underwood | 778 | 1 |
| 5 | City of Wilton | 711 | 1 |
12 total water systems serve McLean County.
All ZIP Codes in McLean County
11 ZIP codes tracked in McLean County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 58576 | Underwood | 70 | B | 1 | $198K |
| 2 | 58540 | Garrison | 68 | C | 1 | $258K |
| 3 | 58759 | Max | 68 | C | 0 | $177K |
| 4 | 58565 | Riverdale | 66 | C | 0 | $221K |
| 5 | 58575 | Turtle Lake | 66 | C | 0 | $170K |
| 6 | 58531 | Coleharbor | 65 | C | 5 | $263K |
| 7 | 58577 | Washburn | 57 | C | 0 | $249K |
| 8 | 58579 | Wilton | 46 | D | 1 | $279K |
| 9 | 58716 | Benedict | 40 | D | 0 | $252K |
| 10 | 58775 | Roseglen | 40 | D | 0 | — |
| 11 | 58778 | Ruso | 40 | D | 0 | $406K |
Recommended Buyer Guides for McLean County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 67.3% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for McLean County, North Dakota
Overview
McLean County in North Dakota covers 11 ZIP codes with an average Home Safety Score of C (57/100).
4 of 11 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to North Dakota 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.