Public Water System

GOLDEN VALLEY WATER COMPANY

PWSID SD4602261 · South Dakota · 283 people served

Fair

GOLDEN VALLEY WATER COMPANY is an EPA-regulated public water system in South Dakota (PWSID SD4602261). It serves an estimated 283 residents — a rural community of customers — across 1 community across 2 ZIP codes.

Over the past five years, GOLDEN VALLEY WATER COMPANY has recorded 3 EPA health-based violations. The grade of C summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

Loading map...

Centered on the averaged ZIP-code centroid of 2 ZIPs served.

Population

283

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for GOLDEN VALLEY WATER COMPANY over the past five years of EPA SDWIS reporting.

Radiumradiological

EPA Code 4000 · Maximum Contaminant Level Exceedance

violations

EPA Limit

5 pCi/L

Last Reading

16 PCI/L

First Reported

Jul 2021

Most Recent

Jul 2021

What this violation means

Radium-226 and Radium-228 occur naturally in groundwater, particularly in regions with granite or sandstone aquifers. Long-term ingestion increases the risk of bone, sinus, and other cancers because radium concentrates in bone tissue.

Recommended precautions

→Reverse osmosis and ion exchange (water softeners) remove radium.
→Boiling does NOT remove radium and may concentrate it.
→Private well users in radium-rich geology should test every 3–5 years.

Read the complete guide to Radium

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by GOLDEN VALLEY WATER COMPANY

BLACK HAWK

ZIP Codes Served

57702 57718

About this system

EPA records this system as PWSID SD4602261. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact GOLDEN VALLEY WATER COMPANY directly or review their annual Consumer Confidence Report (CCR).