LAGO DEL ORO WATER COMPANY

SUN LAKES, AZ · ~18,132 people served

Check your exact address → SUN LAKES overview

100

Excellent

PurityRadar safety score

PWSID

AZ0411117

State

Arizona

City

SUN LAKES

Population served

18,132

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

Latest detections from EPA’s UCMR5 monitoring (through Apr 2025). Levels in parts per trillion (ppt).

Lithium

10,000 ppt

limit —

No federal limit

PFPeA

6 ppt

limit —

No federal limit

PFHxA

3.7 ppt

limit —

No federal limit

Violations & enforcement

601

Violations on record

Unaddressed

Health-based

309

Enforcement actions

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

Monitoring & reporting · EPA contaminant 4020 began Jul 2025 Resolved

Monitoring & reporting · Gross alpha began Jul 2025 Resolved

Monitoring & reporting · Uranium began Jul 2025 Resolved

Monitoring & reporting · Combined radium-226/228 began Jul 2025 Resolved

Monitoring & reporting · EPA contaminant 4030 began Jul 2025 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2022 Resolved

Reporting · Lead & Copper Rule began May 2021 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2019 Resolved

Other · EPA contaminant 7000 began Jul 2016 Resolved

Monitoring & reporting · EPA contaminant 2979 began Jan 2016 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 2016 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jan 2016 Resolved

Recent enforcement actions

State action · SIA Oct 2025
State action · SOX Oct 2025
State action · SOX Aug 2022
State action · SIA May 2022
State action · SOX Jun 2021
State action · SIA Jun 2021
State action · SIA Feb 2020
State action · SOX Jan 2020

This profile is built from EPA public records for system AZ0411117 — 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.