TROLL KNOLL S/D

CHUGIAK, AK · ~99 people served

Check your exact address → CHUGIAK overview

100

Excellent

PurityRadar safety score

PWSID

AK2210778

State

Alaska

City

CHUGIAK

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

336

Violations on record

Unaddressed

Health-based

107

Enforcement actions

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

Other · EPA contaminant 7000 began Oct 2021 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2019 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2018 Resolved

Monitoring & reporting · Nitrate began Jan 2018 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2018 Resolved

Other · EPA contaminant 7000 began Oct 2017 Resolved

Other · EPA contaminant 7000 began Jul 2017 Resolved

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

Monitoring · Lead & Copper Rule began May 2017 Resolved

Monitoring · Lead & Copper Rule began Jan 2017 Resolved

Other · EPA contaminant 7000 began Jul 2016 Resolved

Other · Lead & Copper Rule began Apr 2016 Resolved

Recent enforcement actions

State action · SIB May 2025
State action · SIB Mar 2023
State action · SOX Oct 2021
State action · SOX Mar 2020
State action · SOX Oct 2019
State action · SOX Jun 2019
State action · SIB Dec 2018
State action · SIA Nov 2018

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

Arsenic

22 stations · latest Jun 2024

0 · max 0 ug/L · 23

Nitrate

22 stations · latest Jun 2024

5.13 · max 8.43 mg/L · 23

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 AK2210778 — 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.