Harper County, Oklahoma
3 ZIP codes · Avg score 80/100 · Grade B · Updated 2026-06-03
Water utilities serving Harper County's 3 ZIP codes have built a consistent compliance record — the county's above-average grade reflects years of data showing low violation rates and no systemic health concerns.
How Harper County Compares
How Harper County Compares
Harper 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
Key Risk Factors
Health risk index: 14.9 (asthma 10.7%, diabetes 14%)
Estimated additional annual cost per homeowner: $587, driven primarily by water_lead
Infrastructure: 0.453% avg pipe failure probability, 100% of ZIPs at high risk
85.3% 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: $587
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
1,788 housing units in Harper County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Health Outcomes vs National Average
CDC PLACES data for Harper County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 3 systems in Harper County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Buffalo | 1,200 | 37 |
| 2 | Harper Company Rwd #1 | 198 | 37 |
| 3 | Laverne | 1,097 | 12 |
All ZIP Codes in Harper County
3 ZIP codes tracked in Harper County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73848 | Laverne | 92 | A | 12 | $123K |
| 2 | 73834 | Buffalo | 81 | B | 37 | $94K |
| 3 | 73851 | May | 66 | C | 0 | — |
Recommended Buyer Guides for Harper County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Lead Paint Test Kits — 85.3% of homes built before 1978
Overview
Harper County in Oklahoma covers 3 ZIP codes with an average Home Safety Score of B (80/100).
2 of 3 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.