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YANKTON

Serving 1 city in SD

Safe
4 MCL violations recorded
15K
People Served
1
City
1
Water Sources
4
MCL Violations

Official YANKTON Resources

YANKTON Service Area

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Service Area

This map shows the approximate service area for YANKTON. Actual coverage may vary. Contact the utility directly to confirm service availability at your address.

YANKTON Water Quality Grade

F
Failing

Significant water quality issues. Filter recommended.

Quality Score20/100
0
Above Health Guidelines
4
EPA Violations

Grade is calculated based on contaminants exceeding health guidelines (MCLG) and EPA Maximum Contaminant Level violations. A = Excellent (90-100), B = Good (80-89), C = Fair (70-79), D = Poor (60-69), F = Failing (<60).

Is YANKTON Water Safe to Drink?

YANKTON water currently meets all EPA Maximum Contaminant Level Goals (MCLGs) across all cities served. Water quality testing shows all contaminants are within safe levels according to health-based guidelines.

This utility serves 14,500 people across 1 city in SD. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.

YANKTON Service Area

YANKTON Contact & Information

Emergency Line

605) 668-5200

24/7 After-Hours

Mailing Address

PO BOX 176 Yankton, SD 57078

Water Sources & Treatment

Water Sources

Groundwater

Treatment Methods

filtrationpre-oxidation with chlorinesoftening

Disinfectant Used

ozone

YANKTON Annual Water Quality Reports

2026 Water Quality Report
Latest Consumer Confidence Report (CCR)
View Report

Historical reports are being compiled. Check back soon for archived water quality data.

What is a CCR? The Consumer Confidence Report (CCR) is an annual water quality report that water utilities are required by the EPA to provide to customers. It contains information about your water source, detected contaminants, and compliance status.

EPA Violations

4 Maximum Contaminant Level Violations

This utility has recorded MCL violations, indicating contaminant levels exceeded federal legal limits. These violations are aggregated across all cities served.

Check individual city reports for specific violation details and current status.

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