EAGLE BUTTE

EAGLE BUTTE, SD · ~4,000 people served

Check your exact address → EAGLE BUTTE overview

100

Excellent

PurityRadar safety score

PWSID

SD4600010

State

South Dakota

City

EAGLE BUTTE

Population served

4,000

Primary source

SWP

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 Nov 2025). Levels in parts per trillion (ppt).

Lithium

46,800 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Treatment technique · Lead & Copper Rule health-based began Nov 2024 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Aug 2024 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Aug 2024 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2024 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2018 Resolved

Treatment technique · EPA contaminant 0400 health-based began Nov 2017 Resolved

Monitoring & reporting · EPA contaminant 0600 began Jul 2010 Resolved

Treatment technique · EPA contaminant 0400 health-based began Feb 2010 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2009 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2009 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2009 Resolved

Monitoring & reporting · EPA contaminant 0600 began Apr 2008 Resolved

Recent enforcement actions

State action · SOX Oct 2025
State action · SOX Oct 2025
State action · SOX Sep 2025
State action · SOX Sep 2025
State action · SO6 Nov 2024
State action · SIE Nov 2024
State action · SIE Nov 2024
State action · SIE Apr 2024

This profile is built from EPA public records for system SD4600010 — 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.