Nowata County, Oklahoma
4 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Within Nowata County's 4 tracked ZIP codes, safety indicators remain above the national average with few health-based violations on record.
How Nowata County Compares
How Nowata County Compares
Nowata County scores 6 points below the Oklahoma state average (79/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
Key Risk Factors
Health risk index: 16.1 (asthma 12.3%, diabetes 15.2%)
Estimated additional annual cost per homeowner: $925, driven primarily by wildfire
Infrastructure: 0.435% avg pipe failure probability, 75% of ZIPs at high risk
61.8% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
↓ Improving trendEPA violation counts by year across Nowata County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 28 violations. Past 5 years: 60 total (60 health-based). Health-based violations are declining versus the prior 2-year window.
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: $925
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,905 housing units in Nowata 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 Nowata County
Remediation costs are relatively manageable for most homeowners in Nowata 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 Nowata 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 Nowata County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Elm Bend Rwd Inc. | 600 | 151 |
| 2 | Craig Company Rwd #2 | 4,250 | 145 |
| 3 | Lenapah Public Works Authority | 298 | 105 |
| 4 | Delaware | 456 | 99 |
| 5 | Nowata Municipal Authority | 3,971 | 46 |
9 total water systems serve Nowata County.
All ZIP Codes in Nowata County
4 ZIP codes tracked in Nowata County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 74042 | Lenapah | 79 | B | 6 (4 health) | — |
| 2 | 74027 | Delaware | 75 | B | 99 (5 health) | $127K |
| 3 | 74072 | S Coffeyville | 73 | B | 0 | $142K |
| 4 | 74048 | Nowata | 65 | C | 46 (22 health) | $119K |
Recommended Buyer Guides for Nowata County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 61.8% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Overview
Nowata County in Oklahoma covers 4 ZIP codes with an average Home Safety Score of B (73/100).
3 of 4 ZIP codes have recorded EPA violations. 31 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.