GRANT-ROBERTS RURAL WATER SYSTEM

MILBANK, SD · ~5,050 people served

Check your exact address → MILBANK overview

100

Excellent

PurityRadar safety score

PWSID

SD4600864

State

South Dakota

City

MILBANK

Population served

5,050

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

51,400 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2023. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2022 Resolved

Monitoring & reporting · EPA contaminant 3014 began Jan 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1998 Resolved

Recent enforcement actions

State action · SOX Feb 2023
State action · SIE Jan 2023
State action · SOX Feb 2015
State action · SO6 Feb 2015
State action · SOX Jun 1999
State action · SIF Feb 1999
State action · SIE Jan 1999
State action · SIE May 1990

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Jul 2023

0.018 · max 0.018 mg/L · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system SD4600864 — 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.