Ottawa County, Michigan
17 ZIP codes · Avg score 92/100 · Grade A · Updated 2026-06-03
Recent water monitoring in Ottawa County shows 17 ZIP codes with consistently safe results.
How Ottawa County Compares
How Ottawa County Compares
Ottawa County scores 18 points above the Michigan state average (74/100) and 24 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Ottawa County, Michigan
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.7 (asthma 10.9%, diabetes 9.4%)
Estimated additional annual cost per homeowner: $944, driven primarily by flood
Infrastructure: 0.306% avg pipe failure probability, 6% of ZIPs at high risk
49.6% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Ottawa County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 5 total (5 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: $944
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
126,072 housing units in Ottawa 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 Ottawa County
Remediation costs are relatively manageable for most homeowners in Ottawa 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 Ottawa 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 Ottawa County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Jamestown Township | 3,330 | 8 |
| 2 | Allendale Township | 19,725 | 7 |
| 3 | Georgetown Township | 41,086 | 7 |
| 4 | Hudsonville | 7,708 | 7 |
| 5 | Edgewood Mobile Home Park | 162 | 7 |
34 total water systems serve Ottawa County.
All ZIP Codes in Ottawa County
17 ZIP codes tracked in Ottawa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 49401 | Allendale | 99 | A | 0 | $299K |
| 2 | 49427 | Jamestown | 99 | A | 1 | — |
| 3 | 49429 | Jenison | 99 | A | 0 | — |
| 4 | 49448 | Nunica | 99 | A | 0 | $266K |
| 5 | 49430 | Lamont | 97 | A | 2 | — |
| 6 | 49404 | Coopersville | 95 | A | 1 | $271K |
| 7 | 49409 | Ferrysburg | 95 | A | 1 | $166K |
| 8 | 49464 | Zeeland | 95 | A | 0 | $317K |
| 9 | 49426 | Hudsonville | 92 | A | 7 | $338K |
| 10 | 49423 | Holland | 90 | A | 1 | $255K |
| 11 | 49424 | Holland | 90 | A | 1 | $270K |
| 12 | 49428 | Jenison | 90 | A | 0 | $276K |
| 13 | 49534 | Grand Rapids | 90 | A | 0 | $270K |
| 14 | 49460 | West Olive | 89 | A | 2 | $359K |
| 15 | 49417 | Grand Haven | 84 | B | 4 (1 health) | $288K |
| 16 | 49456 | Spring Lake | 84 | B | 2 | $295K |
| 17 | 49435 | Marne | 73 | B | 0 | $300K |
Recommended Buyer Guides for Ottawa County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- 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 Ottawa County, Michigan
Overview
Ottawa County in Michigan covers 17 ZIP codes with an average Home Safety Score of A (92/100).
10 of 17 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Michigan 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.