Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	AZ0414080
PWS Name	CS TIERRA MESA ESTATES WATER COMPANY
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	632
County Served	Yuma

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	Combined Uranium	12913	Known	01-OCT-2025	31-DEC-2025	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12910	Known	01-JUL-2025	30-SEP-2025	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12911	Returned to Compliance	28-JUN-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12912	Returned to Compliance	28-JUN-2025	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12908	Known	01-APR-2025	30-JUN-2025	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12906	Returned to Compliance	20-FEB-2025	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12909	Known	01-JAN-2025	31-MAR-2025	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	12907	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12904	Returned to Compliance	09-NOV-2024	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	12905	Returned to Compliance	01-OCT-2024	31-DEC-2024	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12903	Known	01-JUL-2024	30-SEP-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12902	Known	01-APR-2024	30-JUN-2024	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	12901	Returned to Compliance	01-JAN-2024	31-MAR-2024	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	12899	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12900	Known	01-JAN-2024	31-MAR-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12898	Known	01-OCT-2023	31-DEC-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12897	Known	01-JUL-2023	30-SEP-2023	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12896	Returned to Compliance	29-APR-2023	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12895	Known	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12894	Known	01-JAN-2023	31-MAR-2023	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12891	Returned to Compliance	24-OCT-2022	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12892	Known	01-OCT-2022	31-DEC-2022	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	12893	Returned to Compliance	01-OCT-2022	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12889	Returned to Compliance	23-JUL-2022	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12890	Known	01-JUL-2022	30-SEP-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12888	Known	01-APR-2022	30-JUN-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12887	Known	01-JAN-2022	31-MAR-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12883	Known	01-OCT-2021	31-DEC-2021	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	12882	Returned to Compliance	01-OCT-2021	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12881	Returned to Compliance	11-SEP-2021	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	12879	Returned to Compliance	01-JUL-2021	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12880	Known	01-JUL-2021	30-SEP-2021	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	12877	Returned to Compliance	03-APR-2021	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12884	Known	01-APR-2021	30-JUN-2021	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12876	Returned to Compliance	27-FEB-2021	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12885	Known	01-JAN-2021	31-MAR-2021	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	12875	Returned to Compliance	01-OCT-2020	31-DEC-2020	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12872	Returned to Compliance	23-AUG-2020	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12873	Returned to Compliance	05-AUG-2020	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	12874	Returned to Compliance	01-AUG-2020	31-AUG-2020	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Uranium	12871	Known	01-JUL-2020	30-SEP-2020	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	12870	Returned to Compliance	22-FEB-2020	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	12869	Returned to Compliance	01-JAN-2020	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	12867	Returned to Compliance	01-JUL-2019	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	12865	Returned to Compliance	01-JAN-2019	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	12864	Returned to Compliance	01-OCT-2018	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	12862	Returned to Compliance	01-OCT-2018	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	12861	Returned to Compliance	01-JUL-2018	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	12860	Returned to Compliance	01-JAN-2018	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	12859	Returned to Compliance	01-JUL-2017	-	No

1 - 50 of 171

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
7129	12911	SOX	State Compliance achieved	17-SEP-2025	State	-
7132	12912	SOX	State Compliance achieved	17-SEP-2025	State	-
7126	12908	SIF	State Public Notification received	10-SEP-2025	State	-
7125	12909	SIF	State Public Notification received	10-SEP-2025	State	-
7127	12910	SIF	State Public Notification received	10-SEP-2025	State	-
7122	12907	SOX	State Compliance achieved	03-SEP-2025	State	-
7117	12906	SOX	State Compliance achieved	01-JUL-2025	State	-
7105	12905	SOX	State Compliance achieved	05-FEB-2025	State	sample submitted via cmdp on 2/5/25 soxed cl10 2/25/25
7101	12903	SIF	State Public Notification received	22-JAN-2025	State	-
7100	12904	SOX	State Compliance achieved	26-DEC-2024	State	-
7094	12902	SIF	State Public Notification received	01-AUG-2024	State	-
7090	12900	SIF	State Public Notification received	09-MAY-2024	State	-
7089	12901	SOX	State Compliance achieved	30-APR-2024	State	Late Data submitted
7083	12899	SOX	State Compliance achieved	19-MAR-2024	State	February RTCR sampling submitted. BM11
7079	12898	SIF	State Public Notification received	12-DEC-2023	State	-
7078	12897	SIF	State Public Notification received	08-SEP-2023	State	-
7070	12894	SIF	State Public Notification received	27-JUN-2023	State	-
7071	12895	SIF	State Public Notification received	27-JUN-2023	State	-
7069	12896	SOX	State Compliance achieved	06-JUN-2023	State	-
7060	12892	SIF	State Public Notification received	21-DEC-2022	State	-
7054	12893	SIA	State Violation/Reminder Notice	07-DEC-2022	State	-
7049	12891	SIA	State Violation/Reminder Notice	18-NOV-2022	State	-
7059	12890	SIF	State Public Notification received	04-NOV-2022	State	-
7045	12888	SIF	State Public Notification received	22-AUG-2022	State	-
7042	12889	SIA	State Violation/Reminder Notice	16-AUG-2022	State	-
7038	12887	SIF	State Public Notification received	15-FEB-2022	State	-
7034	12876	SOX	State Compliance achieved	06-JAN-2022	State	-
7033	12883	SIF	State Public Notification received	09-DEC-2021	State	-
7019	12884	SIE	State Public Notification requested	08-DEC-2021	State	-
7022	12885	SIE	State Public Notification requested	08-DEC-2021	State	-
7014	12862	SOX	State Compliance achieved	01-DEC-2021	State	-
7010	12882	SOX	State Compliance achieved	01-DEC-2021	State	-
7011	12877	SOX	State Compliance achieved	01-DEC-2021	State	-
7006	12881	SOX	State Compliance achieved	22-OCT-2021	State	PWS submitted PN late on 9/20/21. EB7 10/22/21.
7003	12879	SOX	State Compliance achieved	14-OCT-2021	State	PWS submitted 2020 CCR late.
7000	12880	SIE	State Public Notification requested	02-SEP-2021	State	-
7032	12873	SOX	State Compliance achieved	01-AUG-2021	State	-
7031	12870	SOX	State Compliance achieved	01-AUG-2021	State	-
6993	12913	SFL	State Administrative/Compliance Order without penalty issued	07-APR-2021	State	-
6993	12875	SFL	State Administrative/Compliance Order without penalty issued	07-APR-2021	State	-
6993	12871	SFL	State Administrative/Compliance Order without penalty issued	07-APR-2021	State	-
6981	12874	SOX	State Compliance achieved	09-OCT-2020	State	PWS submitted September 2020 RTCR data, returning August 2020 vio to compliance. EB7 10/9/2020.
6974	12872	SIA	State Violation/Reminder Notice	23-SEP-2020	State	-
6973	12867	SOX	State Compliance achieved	06-AUG-2020	State	2020 LCR DATA SUBMITTED ON 07/30/2020. CO3 08/06/2020
6973	12869	SOX	State Compliance achieved	06-AUG-2020	State	2020 LCR DATA SUBMITTED ON 07/30/2020. CO3 08/06/2020
6973	12861	SOX	State Compliance achieved	06-AUG-2020	State	2020 LCR DATA SUBMITTED ON 07/30/2020. CO3 08/06/2020
6973	12860	SOX	State Compliance achieved	06-AUG-2020	State	2020 LCR DATA SUBMITTED ON 07/30/2020. CO3 08/06/2020
6973	12865	SOX	State Compliance achieved	06-AUG-2020	State	2020 LCR DATA SUBMITTED ON 07/30/2020. CO3 08/06/2020
6949	12864	SOX	State Compliance achieved	21-NOV-2018	State	OCT 2018 RTCR Data received late on 11/06/2018. KV3
6946	12855	SOX	State Compliance achieved	04-JUN-2018	State	GWR SAMPLE TAKEN ON 06/07/2017.

1 - 50 of 168

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WL-55-544245 - WEST	6901	Yes	Well	Ground water	Permanent	Active
XWL-55-513889	8004	Yes	Well	Ground water	Permanent	Inactive
XWL-55-806428	6406	Yes	Well	Ground water	Permanent	Inactive
WL-55-544246 - EAST	6916	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	15100	No	Distribution System/Zone	-	-	Active
EPDS001	377	No	Sampling Station	-	-	Active
XEPHIS	17924	No	Sampling Station	-	-	Inactive
STORAGE TANK 001 - 35,000	23488	No	Storage	-	-	Active
STORAGE TANK 002 - 100,000	23489	No	Storage	-	-	Active
XTP001 - CL2	1137	No	Treatment Plant	-	-	Inactive

1 - 10 of 10

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
XTP001 - CL2	1137	Hypochlorination, Pre	Disinfection
XTP001 - CL2	1137	pH Adjustment, Pre	Softening (hardness removal)
XTP001 - CL2	1137	Inhibitor, Orthophosphate	Corrosion control

1 - 3 of 3

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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