LINCOLN COUNTY RURAL WATER SYSTEM

SIOUX FALLS, SD · ~5,965 people served

Check your exact address → SIOUX FALLS overview

100

Excellent

PurityRadar safety score

PWSID

SD4600304

State

South Dakota

City

SIOUX FALLS

Population served

5,965

Primary source

GWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Sep 2023). Levels in parts per trillion (ppt).

Lithium

52,000 ppt

limit —

No federal limit

PFBA

6.1 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Apr 2024 Resolved

Monitoring & reporting · Total coliform began May 2001 Resolved

Recent enforcement actions

State action · SOX Jun 2025
State action · SIF Oct 2024
State action · SIE Jul 2024
State action · SOX Dec 2001
State action · SIF Jul 2001
State action · SIE Jun 2001

This profile is built from EPA public records for system SD4600304 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.