Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0411117
PWS Name	LAGO DEL ORO WATER COMPANY
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	18132
County Served	Pinal

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	65553	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	65557	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	65554	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	65555	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	65556	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	65544	Returned to Compliance	01-JAN-2022	31-MAR-2022	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	65543	Returned to Compliance	01-MAY-2021	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	65541	Returned to Compliance	01-OCT-2019	31-DEC-2019	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	65471	Returned to Compliance	01-JUL-2016	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	65491	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	65490	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	65489	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	65488	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	65487	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	65486	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	65485	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	65484	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	65483	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	65482	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	65481	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	65480	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	65479	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	65478	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	65477	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	65476	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	65475	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	65474	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	65473	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	65472	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	65492	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	65540	Returned to Compliance	01-JAN-2015	31-DEC-2017	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	65538	Returned to Compliance	01-JAN-2015	31-DEC-2017	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	65467	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	65466	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	65465	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	65464	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	65463	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	65462	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	65461	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	65460	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	65459	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	65458	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	65457	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	65456	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	65455	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	65454	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	65453	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	65452	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	65451	Returned to Compliance	01-JAN-2015	31-DEC-2015	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	65450	Returned to Compliance	01-JAN-2015	31-DEC-2015	No

1 - 50 of 601

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
20484	65553	SOX	State Compliance achieved	31-OCT-2025	State	-
20484	65554	SOX	State Compliance achieved	31-OCT-2025	State	-
20484	65557	SOX	State Compliance achieved	31-OCT-2025	State	-
20484	65556	SOX	State Compliance achieved	31-OCT-2025	State	-
20484	65555	SOX	State Compliance achieved	31-OCT-2025	State	-
20476	65544	SOX	State Compliance achieved	24-AUG-2022	State	2Q22 MRDL DATAT SUBMITTED 7/1/22
20468	65543	SOX	State Compliance achieved	29-JUN-2021	State	PWS SUBMITTED MAY 2021 TOTAL COLIFORM SAMPLE LATE - JK5 06/29/2021
20463	65541	SIA	State Violation/Reminder Notice	10-FEB-2020	State	-
20462	65532	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65533	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65534	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65535	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65540	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65537	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65538	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65539	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20462	65536	SOX	State Compliance achieved	12-FEB-2018	State	System submitted qualifying data on 2/12/2018 HML3/29/2018
20436	65493	SIA	State Violation/Reminder Notice	08-MAY-2017	State	-
20441	65495	SIA	State Violation/Reminder Notice	08-MAY-2017	State	-
20439	65494	SIA	State Violation/Reminder Notice	08-MAY-2017	State	-
20435	65447	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65448	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65449	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65450	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65451	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65452	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65453	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65454	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65455	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65456	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65457	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65458	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65459	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65460	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65461	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65462	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65463	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65464	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65465	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65466	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65467	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65468	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65472	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65473	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65474	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65475	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65476	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65477	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65478	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.
20435	65479	SOX	State Compliance achieved	21-FEB-2017	State	PWS sampled VOCs July 11, 2016 EPDS022 and reported to ADEQ 02/21/2017; KLB 02/22/2017.

1 - 50 of 601

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
XWL-55-613456 - 6	5357	Yes	Well	Ground water	Emergency	Inactive
XWL-55-502020 - 12	6308	Yes	Well	Ground water	Permanent	Inactive
XWL-55-514519 - 4	6307	Yes	Well	Ground water	Permanent	Inactive
XWL-55-613453 - 2	5348	Yes	Well	Ground water	Permanent	Inactive
WL-55-573651 - 19	7702	Yes	Well	Ground water	Permanent	Active
WL-55-547494 - 16	7328	Yes	Well	Ground water	Permanent	Active
WL-55-548874 - 17	7301	Yes	Well	Ground water	Permanent	Active
WL-55-548873 - 18	7235	Yes	Well	Ground water	Permanent	Active
WL-55-526451 - 15	6310	Yes	Well	Ground water	Permanent	Active
WL-55-518207 - 14	6309	Yes	Well	Ground water	Permanent	Active
WL-55-623397 - 13	6106	Yes	Well	Ground water	Permanent	Active
WL-55-613455 - 5	6105	Yes	Well	Ground water	Permanent	Active
WL-55-613460 - 7	5356	Yes	Well	Ground water	Permanent	Active
WL-55-613452 - 1	5355	Yes	Well	Ground water	Permanent	Active
WL-55-613457 - 8	5354	Yes	Well	Ground water	Permanent	Active
WL-55-613458 - 11	5352	Yes	Well	Ground water	Permanent	Active
WL-55-613459 - 3	5350	Yes	Well	Ground water	Permanent	Active
WL-55-239155 - 24	26693	Yes	Well	Ground water	Permanent	Active
WL-55-234318 - 23	26460	Yes	Well	Ground water	Permanent	Active
WL-55-586722 - 21	18909	Yes	Well	Ground water	Permanent	Active
WL-55-583154 - 20	18908	Yes	Well	Ground water	Permanent	Active
WL-55-613454 - 4	18907	Yes	Well	Ground water	Permanent	Active
WL-55-206036 - 22	17252	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	12456	No	Distribution System/Zone	-	-	Active
EPDS001	10220	No	Sampling Station	-	-	Active
EPDS005	10222	No	Sampling Station	-	-	Active
EPDS007	10224	No	Sampling Station	-	-	Active
EPDS008	10225	No	Sampling Station	-	-	Active
EPDS013	10226	No	Sampling Station	-	-	Active
EPDS014	10227	No	Sampling Station	-	-	Active
EPDS019	10230	No	Sampling Station	-	-	Active
EPDS022	17184	No	Sampling Station	-	-	Active
EPDS023	26463	No	Sampling Station	-	-	Active
EPDS024	26747	No	Sampling Station	-	-	Active
EPDS003	275	No	Sampling Station	-	-	Active
EPDS004	276	No	Sampling Station	-	-	Active
EPDS017	277	No	Sampling Station	-	-	Active
XEPDS002	10221	No	Sampling Station	-	-	Inactive
XEPDS006	10223	No	Sampling Station	-	-	Inactive
XEPDS015	10228	No	Sampling Station	-	-	Inactive
XEPDS018	10229	No	Sampling Station	-	-	Inactive
XEPDS012	16893	No	Sampling Station	-	-	Inactive
XEPHIS	17785	No	Sampling Station	-	-	Inactive
STORAGE TANK 001 - 100,000	20468	No	Storage	-	-	Active
STORAGE TANK 002 - 12,000	20469	No	Storage	-	-	Active
STORAGE TANK 003 - 12,000	20470	No	Storage	-	-	Active
STORAGE TANK 004 - 12,000	20471	No	Storage	-	-	Active
STORAGE TANK 005 - 250,000	20472	No	Storage	-	-	Active
STORAGE TANK 006 - 200,000	20473	No	Storage	-	-	Active
STORAGE TANK 007 - 200,000	20474	No	Storage	-	-	Active

1 - 50 of 69

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP001 - CL2	16024	Hypochlorination, Pre	Disinfection
TP004 - CL2	16027	Hypochlorination, Pre	Disinfection
TP005 - CL2	16035	Hypochlorination, Pre	Disinfection
TP008 - CL2	16038	Hypochlorination, Pre	Disinfection
TP013 - CL2	16039	Hypochlorination, Pre	Disinfection
TP014 - CL2	16040	Hypochlorination, Pre	Disinfection
TP017 - CL2	16064	Hypochlorination, Pre	Disinfection
TP019 - CL2	16065	Hypochlorination, Pre	Disinfection
TP022 - CL2	21225	Hypochlorination, Pre	Disinfection
TP023 - CL2	26461	Innovative	Disinfection

1 - 10 of 10

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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