Benton County, Washington
9 ZIP codes · Avg score 66/100 · Grade C · Updated
ZipCheckup grade for Benton County: C.
A mixed picture - some signals here are worth your attention.
Compared to top-scoring counties, Benton County's 9 ZIP codes land in the middle tier - some meet standards cleanly, others carry documented violations, and the gap between the best and worst areas is wider than average.
How Benton County Compares
How Benton County Compares
Benton County scores 20 points below the Washington state average (86/100) and 7 points below the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Benton County, Washington
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 10.8%, diabetes 10.4%)
Estimated additional annual cost per homeowner: $1,460, driven primarily by flood
47.3% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Benton County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 16 violations. Past 5 years: 31 total (31 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,460
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
68,463 housing units in Benton 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 Benton County
Remediation costs are relatively manageable for most homeowners in Benton 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 Benton County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Benton County
8 community water systems serving Benton County.
- C
- C
- B
- B
- B
- C
Show all 8 water systems
- C
- B
12 total water systems serve Benton County.
Systems with the most violations in Benton County
5 water systems with recorded EPA violations.
- C
- B
- B
- B
- C
All ZIP Codes in Benton County
9 ZIP codes tracked in Benton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 99353 | West Richland | 76 | B | 22 | $408K |
| 2 | 99350 | Prosser | 74 | B | 29 | $289K |
| 3 | 99354 | Richland | 67 | C | 0 | $355K |
| 4 | 99336 | Kennewick | 66 | C | 2 | $292K |
| 5 | 99338 | Kennewick | 61 | C | 39 (7 health) | $527K |
| 6 | 99352 | Richland | 61 | C | 39 (7 health) | $442K |
| 7 | 99320 | Benton City | 59 | C | 24 | $300K |
| 8 | 99345 | Paterson | — | — | $422K | |
| 9 | 99346 | Plymouth | — | — | $215K |
Recommended Buyer Guides for Benton County
Editorial-only picks, screened against the EPA detections on file.
- Best Water Filters for PFAS — PFAS detected in 3 ZIP codes
- 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 Benton County, Washington
Overview
Benton County in Washington covers 9 tracked ZIP records with an average Home Safety Score of C (66/100) across 7 scored records.
6 of 7 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 7 health-based violations appear in the available health breakdown.
← Back to Washington Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.