Dallas County, Iowa
15 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
For most households in Dallas County, the 15 tracked ZIP codes show adequate but uneven water quality.
How Dallas County Compares
How Dallas County Compares
Dallas County scores 1 points above the Iowa state average (59/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Dallas County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.9 (asthma 9.3%, diabetes 9.1%)
Estimated additional annual cost per homeowner: $596, driven primarily by energy_code_gap
Infrastructure: 0.427% avg pipe failure probability, 67% of ZIPs at high risk
61.8% 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: $596
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
41,440 housing units in Dallas 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 Dallas County
Remediation costs are relatively manageable for most homeowners in Dallas 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 Dallas 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 Dallas County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Xenia Rwd (des Moines) | 12,860 | 33 |
| 2 | De Soto Water Supply | 960 | 14 |
| 3 | Dallas Center Water Supply | 1,901 | 14 |
| 4 | VAN METER MUNICIPAL WATER WORK | 1,074 | 14 |
| 5 | Xenia Rwd (woodward) | 3,465 | 10 |
29 total water systems serve Dallas County.
All ZIP Codes in Dallas County
15 ZIP codes tracked in Dallas County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50063 | Dallas Center | 70 | B | 1 | $263K |
| 2 | 50220 | Perry | 70 | B | 0 | $146K |
| 3 | 50233 | Redfield | 70 | B | 0 | $199K |
| 4 | 50266 | West Des Moines | 70 | B | 0 | $325K |
| 5 | 50039 | Bouton | 69 | C | 5 (1 health) | — |
| 6 | 50261 | Van Meter | 68 | C | 1 | $319K |
| 7 | 50167 | Minburn | 64 | C | 1 | $171K |
| 8 | 50263 | Waukee | 62 | C | 0 | $333K |
| 9 | 50276 | Woodward | 61 | C | 5 | $243K |
| 10 | 50069 | De Soto | 60 | C | 6 | $217K |
| 11 | 50003 | Adel | 59 | C | 7 | $381K |
| 12 | 50038 | Booneville | 53 | D | 0 | — |
| 13 | 50066 | Dawson | 45 | D | 7 | $207K |
| 14 | 50146 | Linden | 40 | D | 0 | $265K |
| 15 | 50235 | Rippey | 40 | D | 0 | $193K |
Recommended Buyer Guides for Dallas County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 61.8% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Dallas County, Iowa
Overview
Dallas County in Iowa covers 15 ZIP codes with an average Home Safety Score of C (60/100).
8 of 15 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Iowa 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.