ZipCheckup grade for 50674: C.

A mixed picture - some signals here are worth your attention.

Your top priority: have older plumbing checked for lead solder. Check your ZIP → EPA: reduce lead

Water Quality Report
C 67

Sumner, IA (50674): High Radon Potential Area - 67/100

EPA data combined for 2 water systems mapped to this ZIP (largest mapped system: Sumner Water Supply)

High County Radon Potential

EPA records for the water systems mapped to 50674 in Sumner, IA contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources
Latest air quality, EPA records and weather alerts Current data temporarily unavailable
Current EPA violation data unavailable
Water records and current conditions
Current EPA violation data unavailable
Safety Score
C 67/100
Water Quality No violations
Lead Risk Below action level Below the reporting limit, 90th percentile, sample period ending 2023-12-31
NFIP Claim History Claim records 23 claims
Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

  • Water No drinking-water violations in EPA records since 2021.
  • Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
  • Radon EPA Zone 1 - highest county-level potential. This is not a home measurement; test before any threshold comparison.
  • Flood 23 cumulative NFIP claim records. Check the current FEMA map for a specific address.
Contaminant Summary
Evidence unavailable
Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record
C
ZIP-level Home Safety model score: 67 / 100
Bottom 35% of U.S. ZIP codes
2
Water Systems
2,030
People Served
0
Health Violations (since 2021)
Groundwater
Water Source
Zone 1
County Radon Potential · High
$156K
Median Home ValueState median: $152K

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Score Breakdown

Overall Home Safety Score: 67/100

This is the published model score. Component and domain values are shown independently; they are not added together on this page.

Canonical components

EPA water compliance
100/100
Observed
PFAS MCL screen
100/100
Observed
EPA radon zone
0/100
Observed
Annual EPA AirData AQI
100/100
Observed

Required domains

Drinking water
100/100
Indoor environment
0/100
Outdoor environment
100/100

Coverage: 4 of 4 components and 3 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (6) CRITICAL

Your Water System

ZIP code 50674 in Sumner, Iowa is mapped to the water system Sumner Water Supply (EPA ID: IA0970006). This system provides water to approximately 2,030 people from groundwater sources.

There are 2 community water systems serving this area.

Water Systems Serving This Area

System Name EPA ID Population Source
Sumner Water Supply IA0970006 2,030 Groundwater
Tripoli Water Supply IA0975032 1,191 Groundwater

Other Water Quality Reports in Iowa

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Sumner Water Supply (IA0970006) on EPA.gov.

5 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →
Environmental Hazards (11) HIGH
Home & Infrastructure (6) HIGH

Possible home maintenance concerns - talk to a local expert.

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Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in Sumner

Based on local data for ZIP 50674, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Home & Flood Insurance

The ZIP code for this report in Sumner has 23 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.

Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote

Check Your Flood Zone (Free)

FEMA flood map lookup - see if your property is in a flood zone

Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)

Gutter Installation & Repair

The median home in 50674 was built around 1901. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.

Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home

Estimate Your Home Maintenance Costs

Window Replacement

The median build year of homes in Sumner is 1901; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.

Typical cost: Window replacement: typically $300–$800 per window installed

Estimate Your Home Maintenance Costs

Roofing Inspection & Repair

Homes built around 1901 may be on their second or third roof. A professional inspection can catch damage before leaks start.

Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500

Estimate Your Home Insurance Needs

Service recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.

Frequently Asked Questions

Is the tap water in 50674 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 50674 (primary system: Sumner Water Supply), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 50674's water come from?

The recorded water source for Sumner Water Supply, a system mapped to ZIP code 50674, is Groundwater. This system serves approximately 2,030 people.

How does Sumner water compare to the national average?

Sumner's Home Safety Score ranks lower than 65% of U.S. ZIP codes, and lower than 59% of ZIP codes within Iowa.

How can I get my water tested in Sumner?

If Sumner Water Supply supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

What is the radon risk for 50674?

50674 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Bremer County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

What does the NFIP claim history show for ZIP 50674?

FEMA records contain 23 flood insurance claims filed in ZIP code 50674; the recorded rated-zone value (the most frequent one if there are several claims) is A, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.

How to cite this page

APA ZipCheckup. (2026). Sumner, IA (50674): High Radon Potential Area - 67/100. https://zipcheckup.com/report/50674/
BibTeX 
@misc{zipcheckup-report-50674,
  author = {{ZipCheckup}},
  title  = {{Sumner, IA (50674): High Radon Potential Area - 67/100}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/50674/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 50674

ZIP Code City, State Distance Grade Violations
50681 Westgate, IA 6.8 mi N/A 0
50676 Tripoli, IA 7.8 mi C 0
50630 Fredericksburg, IA 9.1 mi N/A 0
50631 Frederika, IA 9.9 mi N/A 0
50664 Oran, IA 10.0 mi N/A 0
52147 Hawkeye, IA 11.0 mi N/A 0
50668 Readlyn, IA 11.4 mi N/A 0
52164 Randalia, IA 11.9 mi N/A 0
50655 Maynard, IA 12.4 mi N/A 0
52171 Waucoma, IA 14.6 mi N/A 0

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Coverage: 14/17 risk factors Data sources →
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