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Water system · PWSID MP0000221

Diamond Water Gualo Rai

100
Excellent
PurityRadar safety score

PWSID

MP0000221

State

Northern Mariana Islands

City

SAIPAN

Population served

55

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

4

Violations on record

0

Unaddressed

3

Health-based

4

Enforcement actions

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

Treatment technique · EPA contaminant 0700 health-based began Aug 2024 Resolved
Treatment technique · EPA contaminant 0700 health-based began Aug 2024 Resolved
Monitoring & reporting · Nitrate began Jan 2023 Resolved
Treatment technique · EPA contaminant 0700 health-based began Nov 2021 Resolved

Recent enforcement actions

  • State action · SOX Apr 2025
  • State action · SOX Apr 2025
  • State action · SOX Mar 2024
  • State action · SOX Apr 2022

This profile is built from EPA public records for system MP0000221 — 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.