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Water system · PWSID SD4600199

MADISON

MADISON, SD · ~6,191 people served

Check your exact address → MADISON overview
100
Excellent
PurityRadar safety score

PWSID

SD4600199

State

South Dakota

City

MADISON

Population served

6,191

Primary source

Groundwater

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 Aug 2024). Levels in parts per trillion (ppt).

Lithium

87,000 ppt

limit —

No federal limit

Violations & enforcement

33

Violations on record

0

Unaddressed

9

Health-based

42

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2014. Official EPA record →

Other began Apr 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2011 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2011 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2011 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jul 1996 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jul 1996 Resolved

Recent enforcement actions

  • State action · SOX Apr 2014
  • State action · SO6 Jan 2014
  • State action · SOX Aug 2013
  • State action · SOX Aug 2013
  • State action · SOX Aug 2013
  • State action · SOX Aug 2013
  • State action · SOX Aug 2013
  • State action · SOX Aug 2013

This profile is built from EPA public records for system SD4600199 — 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.