Grand Forks County, North Dakota
22 ZIP codes · Avg score 55/100 · Grade C · Updated 2026-06-04
Across Grand Forks County's 22 ZIP codes, water safety results are uneven — a portion of systems carry active or recent violations, while others meet standards without issues.
How Grand Forks County Compares
How Grand Forks County Compares
Grand Forks County scores 1 points below the North Dakota state average (56/100) and 13 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Grand Forks 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: 11.5 (asthma 10.3%, diabetes 9.6%)
Estimated additional annual cost per homeowner: $1,057, driven primarily by flood
Infrastructure: 0.394% avg pipe failure probability, 56% of ZIPs at high risk
68.4% 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: $1,057
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
34,022 housing units in Grand Forks 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 Grand Forks County
Remediation costs are relatively manageable for most homeowners in Grand Forks 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 Grand Forks 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 Grand Forks County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | EAST CENTRAL REGIONAL WD-GF | 5,995 | 12 |
| 2 | TRI-COUNTY WATER DISTRICT | 2,501 | 10 |
| 3 | Agassiz Water Users District | 3,438 | 7 |
| 4 | EMERADO CITY OF | 414 | 6 |
| 5 | City of Northwood | 945 | 3 |
11 total water systems serve Grand Forks County.
All ZIP Codes in Grand Forks County
22 ZIP codes tracked in Grand Forks County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 58214 | Arvilla | 70 | B | 0 | — |
| 2 | 58251 | Larimore | 70 | B | 1 | $214K |
| 3 | 58235 | Gilby | 68 | C | 0 | $111K |
| 4 | 58208 | Grand Forks | 67 | C | 0 | — |
| 5 | 58267 | Northwood | 67 | C | 3 | $204K |
| 6 | 58207 | Grand Forks | 63 | C | 0 | — |
| 7 | 58202 | Grand Forks | 62 | C | 0 | — |
| 8 | 58206 | Grand Forks | 62 | C | 0 | — |
| 9 | 58278 | Thompson | 61 | C | 2 | $314K |
| 10 | 58204 | Grand Forks Afb | 53 | D | 0 | — |
| 11 | 58205 | Grand Forks Afb | 53 | D | 0 | — |
| 12 | 58218 | Buxton | 53 | D | 0 | $245K |
| 13 | 58228 | Emerado | 53 | D | 6 | $177K |
| 14 | 58250 | Lankin | 53 | D | 0 | $83K |
| 15 | 58258 | Mekinock | 53 | D | 0 | $99K |
| 16 | 58275 | Reynolds | 53 | D | 0 | $216K |
| 17 | 58203 | Grand Forks | 52 | D | 0 | $203K |
| 18 | 58201 | Grand Forks | 47 | D | 0 | $274K |
| 19 | 58224 | Dahlen | 40 | D | 0 | $68K |
| 20 | 58244 | Inkster | 40 | D | 0 | — |
| 21 | 58256 | Manvel | 40 | D | 0 | $208K |
| 22 | 58273 | Pisek | 40 | D | 0 | $78K |
Recommended Buyer Guides for Grand Forks 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 — 68.4% 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
Deep Dive Reports
Detailed analysis for Grand Forks County, North Dakota
Overview
Grand Forks County in North Dakota covers 22 ZIP codes with an average Home Safety Score of C (55/100).
4 of 22 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.