Ottawa County, Oklahoma
11 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
Homeowners across Ottawa County's 11 ZIP codes live with water safety scores that generally beat state and national averages.
How Ottawa County Compares
How Ottawa County Compares
Ottawa County scores 1 points above the Oklahoma state average (79/100) and 12 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Ottawa County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.2 (asthma 12.6%, diabetes 15.2%)
Estimated additional annual cost per homeowner: $899, driven primarily by flood
Infrastructure: 0.434% avg pipe failure probability, 70% of ZIPs at high risk
68.9% 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: 2024 with 30 violations. Past 5 years: 41 total (41 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: $899
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
14,289 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 | Ottawa Company Rwd #5 | 750 | 78 |
| 2 | Ottawa Company Rwd # 4 | 652 | 55 |
| 3 | Miami | 13,704 | 44 |
| 4 | Ottawa Company Rwd #6 | 560 | 40 |
| 5 | North Miami | 433 | 39 |
21 total water systems serve Ottawa County.
All ZIP Codes in Ottawa County
11 ZIP codes tracked in Ottawa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 74339 | Commerce | 94 | A | 4 (1 health) | $72K |
| 2 | 73544 | Gould | 92 | A | 6 | $66K |
| 3 | 74343 | Fairland | 90 | A | 8 (2 health) | $136K |
| 4 | 74355 | Miami | 85 | A | 16 (2 health) | — |
| 5 | 74358 | North Miami | 83 | B | 19 (1 health) | $57K |
| 6 | 74370 | Wyandotte | 82 | B | 31 (2 health) | $134K |
| 7 | 74363 | Quapaw | 79 | B | 31 (2 health) | $113K |
| 8 | 74335 | Cardin | 73 | B | 0 | — |
| 9 | 74354 | Miami | 70 | B | 16 (2 health) | $120K |
| 10 | 74554 | Krebs | 70 | B | 13 (12 health) | $96K |
| 11 | 74360 | Picher | 66 | C | 0 | — |
Recommended Buyer Guides for Ottawa County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Lead Paint Test Kits — 68.9% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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, Oklahoma
Overview
Ottawa County in Oklahoma covers 11 ZIP codes with an average Home Safety Score of B (80/100).
9 of 11 ZIP codes have recorded EPA violations. 24 health-based violations have been documented.
← Back to Oklahoma 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.