Webster
EPA ID: SD4600360 · 1,728 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Webster (SD4600360): no drinking-water violations recorded since 2021. Webster has no EPA violations on record; the utility serves 1,728 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Webster Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Webster have a median household income of $69,844 and about 2,611 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 85% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 100% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Webster's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in South Dakota
System Overview
Webster (EPA ID: SD4600360) is a community water system in South Dakota that serves approximately 1,728 people from surface water sources.
This system serves ZIP code 57274 in Webster.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.003 mg/L | No | 2024-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by SD or modeled from parcel and building-footprint data.
- 57274 - Webster
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Webster (SD4600360) on EPA.gov.
Frequently Asked Questions
Is Webster water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Webster in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Webster serve?
Webster serves approximately 1,728 people across 1 ZIP code in South Dakota.
Where does Webster get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Webster Water Quality Report, SD. https://zipcheckup.com/water-system/sd4600360/
@misc{zipcheckup-water-system-sd4600360,
author = {{ZipCheckup}},
title = {{Webster Water Quality Report, SD}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/sd4600360/}
}