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LAGO DEL ORO WATER COMPANY

Arizona — Community Water System — PWSID: AZ0411117

System Information

PWSIDAZ0411117
System NameLAGO DEL ORO WATER COMPANY
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedAug 19, 1995
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CitySUN LAKES
ZIP Code85248-7463
Address—
OrganizationLAGO DEL ORO WATER CO
Phone520-825-3423

Population & Service

Population Served18,132
Service Connections6,915

Drinking Water Violations (777)

This water system has 777 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2025 Sep 30, 2025 Radium-228 MR No Yes — — — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Combined Uranium MR No Yes — 30 ug/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Radium-226 MR No Yes — — — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2021 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 29, 2021 Revised Total Coliform Rule
May 1, 2021 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 29, 2021 Revised Total Coliform Rule
Oct 1, 2019 Dec 31, 2019 Chlorine MR No No — 4.0 mg/L — Resolved Dec 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Chlorine MR No No — 4.0 mg/L — Resolved Dec 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 13, 2016 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 13, 2016 Consumer Confidence Rule
Jan 1, 2016 Dec 31, 2016 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2016 Dec 31, 2016 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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