Linn County, Iowa
33 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-03
Across Linn County, EPA compliance data for 33 ZIP codes sits at a moderate level — not alarming, but not uniformly clean either.
How Linn County Compares
How Linn County Compares
Linn County scores 2 points above the Iowa state average (59/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Linn County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.4 (asthma 10.3%, diabetes 11.2%)
Estimated additional annual cost per homeowner: $945, driven primarily by flood
Infrastructure: 0.395% avg pipe failure probability, 48% of ZIPs at high risk
58.7% 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: $945
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
102,449 housing units in Linn 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 Linn County
Remediation costs are relatively manageable for most homeowners in Linn 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 Linn 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 Linn County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Cedar Rapids Water Department | 141,831 | 1151 |
| 2 | Country Manor Estates | 228 | 1089 |
| 3 | Yes Five Seasons Cedar Llc | 994 | 1078 |
| 4 | Cedar Terrace Mhc | 600 | 1078 |
| 5 | Martelle Water Works | 249 | 1078 |
38 total water systems serve Linn County.
All ZIP Codes in Linn County
33 ZIP codes tracked in Linn County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 52202 | Alburnett | 70 | B | 1 | $233K |
| 2 | 52210 | Brandon | 70 | B | 0 | $168K |
| 3 | 52227 | Ely | 70 | B | 0 | $300K |
| 4 | 52314 | Mount Vernon | 70 | B | 0 | $280K |
| 5 | 52336 | Springville | 70 | B | 1 | $213K |
| 6 | 52352 | Walker | 70 | B | 0 | $210K |
| 7 | 52253 | Lisbon | 69 | C | 4 (1 health) | $222K |
| 8 | 52228 | Fairfax | 68 | C | 4 | $302K |
| 9 | 52218 | Coggon | 66 | C | 4 | $171K |
| 10 | 52219 | Prairieburg | 66 | C | 0 | $99K |
| 11 | 52341 | Toddville | 66 | C | 55 (1 health) | $360K |
| 12 | 52406 | Cedar Rapids | 65 | C | 77 (2 health) | — |
| 13 | 52408 | Cedar Rapids | 65 | C | 77 (2 health) | — |
| 14 | 52411 | Cedar Rapids | 65 | C | 77 (2 health) | $425K |
| 15 | 52213 | Center Point | 62 | C | 10 | $254K |
| 16 | 52233 | Hiawatha | 62 | C | 11 | $201K |
| 17 | 52214 | Central City | 60 | C | 0 | $235K |
| 18 | 52402 | Cedar Rapids | 60 | C | 77 (2 health) | $189K |
| 19 | 52407 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 20 | 52409 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 21 | 52410 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 22 | 52497 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 23 | 52498 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 24 | 52499 | Cedar Rapids | 60 | C | 77 (2 health) | — |
| 25 | 52324 | Palo | 59 | C | 3 | $321K |
| 26 | 52302 | Marion | 57 | C | 0 | $233K |
| 27 | 52401 | Cedar Rapids | 55 | C | 77 (2 health) | $144K |
| 28 | 52403 | Cedar Rapids | 55 | C | 77 (2 health) | $191K |
| 29 | 52328 | Robins | 53 | D | 0 | $343K |
| 30 | 52344 | Troy Mills | 53 | D | 0 | — |
| 31 | 52404 | Cedar Rapids | 50 | D | 77 (2 health) | $160K |
| 32 | 52405 | Cedar Rapids | 50 | D | 77 (2 health) | $174K |
| 33 | 52329 | Rowley | 40 | D | 0 | $171K |
Recommended Buyer Guides for Linn 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 — 58.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Linn County, Iowa
Overview
Linn County in Iowa covers 33 ZIP codes with an average Home Safety Score of C (61/100).
23 of 33 ZIP codes have recorded EPA violations. 30 health-based violations 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.