NISLAND

NISLAND, SD · ~206 people served

Check your exact address → NISLAND overview

100

Excellent

PurityRadar safety score

PWSID

SD4600225

State

South Dakota

City

NISLAND

Population served

206

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

203

Violations on record

Unaddressed

Health-based

198

Enforcement actions

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

Other · EPA contaminant 7500 began Oct 2024 Unaddressed

Monitoring · Lead & Copper Rule began Sep 2024 Resolved

Monitoring · Lead & Copper Rule began Aug 2024 Resolved

Monitoring · Lead & Copper Rule began Jul 2024 Resolved

Monitoring · Lead & Copper Rule began Jun 2024 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2024 Resolved

Monitoring · Lead & Copper Rule began Dec 2023 Resolved

Monitoring · Lead & Copper Rule began Oct 2023 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2020 Resolved

Monitoring · Lead & Copper Rule began Oct 2020 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2017 Resolved

Treatment technique · EPA contaminant 0700 health-based began Sep 2017 Resolved

Recent enforcement actions

State action · SOX Jun 2025
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SOX Dec 2024
State action · SIF Nov 2024

This profile is built from EPA public records for system SD4600225 — 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.