Mercer County, North Dakota
4 ZIP codes · Avg score 66/100 · Grade C · Updated 2026-06-04
The systems supplying Mercer County's 4 ZIP codes vary in performance — most meet minimum standards, but violations in select areas are on record.
How Mercer County Compares
How Mercer County Compares
Mercer County scores 10 points above the North Dakota state average (56/100) and 2 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
Key Risk Factors
Health risk index: 14.2 (asthma 10.3%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $685, driven primarily by flood
Infrastructure: 0.362% avg pipe failure probability, 25% of ZIPs at high risk
66.8% 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: $685
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,837 housing units in Mercer 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 Mercer County
Remediation costs are relatively manageable for most homeowners in Mercer 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 Mercer County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 4 systems in Mercer County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Zap | 237 | 1 |
| 2 | City of Beulah | 3,058 | 0 |
| 3 | City of Golden Valley | 182 | 0 |
| 4 | City of Stanton | 366 | 0 |
All ZIP Codes in Mercer County
4 ZIP codes tracked in Mercer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 58580 | Zap | 70 | B | 1 | $252K |
| 2 | 58541 | Golden Valley | 66 | C | 0 | $232K |
| 3 | 58571 | Stanton | 66 | C | 0 | $119K |
| 4 | 58523 | Beulah | 60 | C | 0 | $200K |
Recommended Buyer Guides for Mercer County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 66.8% of homes built before 1978
- 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
Overview
Mercer County in North Dakota covers 4 ZIP codes with an average Home Safety Score of C (66/100).
1 of 4 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.