GEMSTONE ESTATES

BIG LAKE, AK · ~75 people served

Check your exact address → BIG LAKE overview

100

Excellent

PurityRadar safety score

PWSID

AK2220146

State

Alaska

City

BIG LAKE

Population served

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

262

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7500 began May 2024 Resolved

Other · EPA contaminant 7000 began Oct 2020 Resolved

Monitoring & reporting · Fluoride began Jan 2020 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 2015 Resolved

Monitoring & reporting · EPA contaminant 2979 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2980 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2981 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2964 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2969 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2968 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2977 began Oct 2012 Resolved

Monitoring & reporting · EPA contaminant 2380 began Oct 2012 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SOX Dec 2024
State action · SIE May 2024
State action · SFH May 2024
State action · SFH Apr 2024
State action · SIE Apr 2024
State action · SIF Oct 2023
State action · SIE Oct 2023

This profile is built from EPA public records for system AK2220146 — 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.