Water Quality Report

Langford, SD (57454): High Radon Potential Area

EPA data combined for 2 water systems mapped to this ZIP (largest mapped system: Brown-day-marshall Rws)

High County Radon Potential

EPA records for the water systems mapped to 57454 in Langford, SD 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

Safety Score N/A

Water Quality No violations

Lead Risk Below action level 0.002 mg/L, 90th percentile, sample period ending 2025-12-31

NFIP Claim History Claim records 1 claim

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 of 0.002 mg/L is below the EPA action level for water systems; 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 1 cumulative NFIP claim record. Claim evidence is historical, not current map coverage.

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

Water Systems

5,673

People Served

Health Violations (since 2021)

Groundwater

Water Source

0.002 mg/L

Reported Lead Result

Zone 1

County Radon Potential · High

$181K

Median Home Value12% above state median ($162K)

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Score Breakdown

Overall Home Safety Score: Score unavailable

Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.

Canonical components

EPA water compliance

100/100

Observed

PFAS MCL screen

Unknown

Evidence missing

EPA radon zone

0/100

Observed

Annual EPA AirData AQI

Unknown

Evidence missing

Required domains

Drinking water

Unknown

Indoor environment

0/100

Outdoor environment

Unknown

Coverage: 2 of 4 components and 1 of 3 domains observed.

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

Safety & Health (5) HIGH

Your Water System

ZIP code 57454 in Langford, South Dakota is mapped to the water system Brown-day-marshall Rws (EPA ID: SD4600882). This system provides water to approximately 5,673 people from groundwater sources.

There are 2 community water systems serving this area.

Water Systems Serving This Area

System Name	EPA ID	Population	Source
Brown-day-marshall Rws	SD4600882	5,673	Groundwater
Web Water Development Association	SD4601089	20,750	Surface water

Other Water Quality Reports in South Dakota

57001 (Alcester) - 2 violations recorded for mapped water systems
57002 (Aurora)
57003 (Baltic)
57004 (Beresford) - 2 violations recorded for mapped water systems
57005 (Brandon) - 3 violations recorded for mapped water systems
57006 (Brookings) - 3 violations recorded for mapped water systems
57007 (Brookings)
57010 (Burbank)
57012 (Canistota)
57013 (Canton) - 3 violations recorded for mapped water systems
57014 (Centerville) - 2 violations recorded for mapped water systems
57015 (Chancellor) - 2 violations recorded for mapped water systems
57016 (Chester) - 1 violation recorded for mapped water systems
57017 (Colman) - 1 violation recorded for mapped water systems
57018 (Colton)
57020 (Crooks)
57021 (Davis)
57022 (Dell Rapids) - 1 violation recorded for mapped water systems
57024 (Egan) - 3 violations recorded for mapped water systems
57025 (Elk Point)

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 Brown-day-marshall Rws (SD4600882) 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) MODERATE

Home & Infrastructure (6) MODERATE

Cost & Community (6) 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 Langford

Based on local data for ZIP 57454, 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 Langford has 1 FEMA flood claim 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 57454 was built around 1979. 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 Langford is 1979; 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 1979 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 57454 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 57454 (primary system: Brown-day-marshall Rws), 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 57454's water come from?

The recorded water source for Brown-day-marshall Rws, a system mapped to ZIP code 57454, is Groundwater. This system serves approximately 5,673 people.

How can I get my water tested in Langford?

If Brown-day-marshall Rws 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.

Is lead a concern in 57454 tap water?

The Lead and Copper Rule record selected for 57454 reports a 90th-percentile lead result of 0.002 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.

What is the radon risk for 57454?

57454 is mapped to a county in EPA Radon Zone 1 (high county-level radon potential; EPA recommends testing every home), located in Marshall 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 57454?

FEMA records contain 1 flood insurance claim filed in ZIP code 57454; the recorded rated-zone value (the most frequent one if there are several claims) is X, 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). Langford, SD (57454): High Radon Potential Area. https://zipcheckup.com/report/57454/

BibTeX

@misc{zipcheckup-report-57454,
  author = {{ZipCheckup}},
  title  = {{Langford, SD (57454): High Radon Potential Area}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/57454/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 57454

ZIP Code	City, State	Distance	Grade
57468	Pierpont, SD	8.4 mi	N/A
57421	Amherst, SD	11.7 mi	N/A
57432	Claremont, SD	12.4 mi	N/A
57430	Britton, SD	13.0 mi	N/A
57261	Roslyn, SD	14.6 mi	N/A
57422	Andover, SD	14.8 mi	N/A
57445	Groton, SD	19.1 mi	C
57449	Houghton, SD	19.2 mi	C
57232	Eden, SD	20.2 mi	N/A
57247	Lake City, SD	22.0 mi	N/A