Benton County, Washington
9 ZIP codes · Avg score 66/100 · Grade C
ZipCheckup grade for Benton County: C.
A mixed picture - some signals here are worth your attention.
ZipCheckup gives Benton County a C; the county page lists 9 ZIP codes, each with its own report.
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
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%)
Modeled additional annual cost estimate per homeowner: $1,360, largest modeled factor: Flood
47% of homes built before 1980 (lead paint was banned for residential use in 1978)
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 DWINSA infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,360
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
Modeled remediation costs in Benton County can be compared with the median property value; actual costs vary by property.
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 mapped to Benton County ZIP codes
8 community water systems mapped to Benton County ZIP codes; EPA may list more systems serving the county.
- C
- C
- B
- B
- B
- C
Show all 8 water systems
- C
- B
12 water systems mapped to Benton County ZIP codes in our data; EPA may list more systems serving the county.
Systems with the most violations in Benton County
5 water systems with violations in EPA records.
- 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
Selection follows a fixed set of rules applied to local records: signals such as PFAS detections, lead action-level exceedances on record, a large share of pre-1978 housing, EPA Radon Zone 1, or a top flood or wildfire risk each add a related guide, and when none applies, general water testing and filtration guides are shown instead.
- Water Filters Certified for PFAS Reduction — 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.