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Water system · PWSID WA5387140

TAMOSHAN

Olympia, WA · ~260 people served

Check your exact address → Olympia overview
100
Excellent
PurityRadar safety score

PWSID

WA5387140

State

Washington

City

Olympia

Population served

260

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

19

Violations on record

0

Unaddressed

10

Health-based

18

Enforcement actions

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

Monitoring · Lead & Copper Rule began Jun 2025 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2023 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2023 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2022 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2022 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2022 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2022 Resolved
Monitoring · Lead & Copper Rule began Dec 2021 Resolved
Monitoring · Lead & Copper Rule began Nov 2021 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2021 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2018 Resolved

Recent enforcement actions

  • State action · SOX Jul 2025
  • State action · SOX Sep 2023
  • State action · SOX Jan 2022
  • State action · SFL Dec 2021
  • State action · SOX May 2019
  • State action · SOX May 2019
  • State action · SOX Jun 2017
  • State action · SFJ May 2017

This profile is built from EPA public records for system WA5387140 — 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.