Clark Rural Water System
EPA ID: SD4600881 · 2,325 people served · 16 ZIP codes
ZipCheckup's reading of EPA SDWIS for Clark Rural Water System (SD4600881): no EPA violations recorded in the last five years. Unlike many utilities its size, Clark Rural Water System carries a violation-free five-year record - no EPA notices, no MCL exceedances, serving 2,325 people.
Data: EPA SDWIS
Service Area Map
Coverage area for Clark Rural Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Clark Rural Water System serves a community with a median household income of $66,782 and an estimated 37,752 residents across its service area. Approximately 74% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 64% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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?
Clark Rural Water System's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in South Dakota
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Clark Rural Water System (EPA ID: SD4600881) is a community water system in South Dakota that serves approximately 2,325 people from groundwater sources.
This system provides water to 16 ZIP codes across 16 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0 mg/L | No | N/A |
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
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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.
- 57201 - Watertown
- 57217 - Bradley
- 57221 - Bryant
- 57225 - Clark
- 57235 - Florence
- 57236 - Garden City
- 57238 - Goodwin
- 57242 - Hazel
- 57243 - Henry
- 57258 - Raymond
- 57263 - South Shore
- 57271 - Vienna
- 57272 - Wallace
- 57273 - Waubay
- 57274 - Webster
- 57278 - Willow Lake
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Clark Rural Water System (SD4600881) on EPA.gov.
Frequently Asked Questions
Is Clark Rural Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Clark Rural Water System 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 Clark Rural Water System serve?
Clark Rural Water System serves approximately 2,325 people across 16 ZIP codes in South Dakota.
Where does Clark Rural Water System get its water?
The primary water source is groundwater.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Clark Rural Water System Water Quality Report, SD. https://zipcheckup.com/water-system/sd4600881/
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