Black Hawk County, Iowa
15 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Within Black Hawk County, safety data across 15 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Black Hawk County Compares
How Black Hawk County Compares
Black Hawk 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: Black Hawk County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.3 (asthma 10.4%, diabetes 11.6%)
Estimated additional annual cost per homeowner: $1,519, driven primarily by flood
Infrastructure: 0.428% avg pipe failure probability, 71% of ZIPs at high risk
71.5% 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: $1,519
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
60,950 housing units in Black Hawk 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 Black Hawk County
Remediation costs are relatively manageable for most homeowners in Black Hawk 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 Black Hawk 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 Black Hawk County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Lenwood Utilities | 238 | 9 |
| 2 | Cedar Falls Municipal Water Utilities | 40,713 | 6 |
| 3 | Cedar Falls Mobile Home Village | 388 | 6 |
| 4 | Waterloo Water Works | 69,504 | 4 |
| 5 | Shell Rock Muni Water Supp | 1,269 | 3 |
15 total water systems serve Black Hawk County.
All ZIP Codes in Black Hawk County
15 ZIP codes tracked in Black Hawk County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50643 | Hudson | 70 | B | 0 | $241K |
| 2 | 50704 | Waterloo | 70 | B | 0 | — |
| 3 | 50614 | Cedar Falls | 65 | C | 3 | — |
| 4 | 50707 | Evansdale | 65 | C | 1 | $143K |
| 5 | 50647 | Janesville | 64 | C | 0 | $278K |
| 6 | 50648 | Jesup | 63 | C | 1 | $211K |
| 7 | 50634 | Gilbertville | 62 | C | 0 | $188K |
| 8 | 50651 | La Porte City | 60 | C | 1 | $173K |
| 9 | 50702 | Waterloo | 60 | C | 0 | $146K |
| 10 | 50703 | Waterloo | 60 | C | 0 | $93K |
| 11 | 50626 | Dunkerton | 59 | C | 3 | $197K |
| 12 | 50701 | Waterloo | 55 | C | 0 | $183K |
| 13 | 50613 | Cedar Falls | 54 | D | 3 | $258K |
| 14 | 50623 | Dewar | 53 | D | 0 | $171K |
| 15 | 50667 | Raymond | 40 | D | 0 | $210K |
Recommended Buyer Guides for Black Hawk County
Filtered against federal data, fitted to local risks.
- Best Lead Paint Test Kits — 71.5% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Black Hawk County, Iowa
Overview
Black Hawk County in Iowa covers 15 ZIP codes with an average Home Safety Score of C (60/100).
6 of 15 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.