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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.

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Violations

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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
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	39	Returned to Compliance	01-SEP-2025	30-SEP-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	40	Returned to Compliance	01-SEP-2025	30-SEP-2025	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	36	Returned to Compliance	11-MAR-2024	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	29	Returned to Compliance	01-JAN-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	32	Returned to Compliance	01-SEP-2022	31-AUG-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	31	Returned to Compliance	01-SEP-2022	31-AUG-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	27	Returned to Compliance	01-JUL-2022	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	26	Returned to Compliance	11-OCT-2021	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	25	Returned to Compliance	01-OCT-2021	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	21	Returned to Compliance	01-DEC-2018	31-DEC-2018	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	16	Returned to Compliance	01-JUL-2014	31-JUL-2014	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	19	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	18	Returned to Compliance	01-JAN-2014	31-DEC-2014	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-APR-2009	30-APR-2009	Yes

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
48	40	SOX	State Compliance achieved	20-OCT-2025	Region	October RTCR samples and associated chlorine residuals collected and submitted to EPA as required. 10/20/2025. jc
49	39	SOX	State Compliance achieved	08-OCT-2025	Region	PWS RTC'd when EPA received 2 routine samples collected on 10/08/2025. jsh 12/30/25
40	32	SOX	State Compliance achieved	28-AUG-2024	Region	Completed sampling 8/28/24, SOXed violation-MRF(12/11/24)
39	31	SOX	State Compliance achieved	28-AUG-2024	Region	Completed sampling 8/28/24, SOXed violation-MRF(12/11/24)
43	36	SOX	State Compliance achieved	15-MAR-2024	Region	PWS RTC'd when EPA received the Feb 2024 TC sample results on 3/15/24. JSH 1/10/25
36	25	SOX	State Compliance achieved	20-DEC-2023	Region	System collected 2 rounds of sampling for Jan-June & July-Dec 2023, SOXed (BB_12/20/23).
36	29	SOX	State Compliance achieved	20-DEC-2023	Region	System collected 2 rounds of sampling for Jan-June & July-Dec 2023, SOXed (BB_12/20/23).
36	27	SOX	State Compliance achieved	20-DEC-2023	Region	System collected 2 rounds of sampling for Jan-June & July-Dec 2023, SOXed (BB_12/20/23).
24	26	SOX	State Compliance achieved	28-OCT-2021	Region	Our office didn’t receive the September 2021 results until October 28, 2021. In addition, the July 2021 results weren’t received until August 16, 2021. JSH 12/10/2021
19	21	SOX	State Compliance achieved	02-JAN-2019	Region	2 samples coll for RTC 1/2/19. JSH 5/3/19
14	19	SOX	State Compliance achieved	19-JUN-2017	Region	Sample collected on 11/24/14. This annual violation should have been a quarterly violation for 3rd QTR 2014. This compliance for this violation has been met. swt 06/16/2017
14	18	SOX	State Compliance achieved	19-JUN-2017	Region	Sample collected on 11/24/14. This annual violation should have been a quarterly violation for 3rd QTR 2014. This compliance for this violation has been met. swt 06/16/2017
10	16	SOX	State Compliance achieved	22-SEP-2014	Region	-
4	1	SOX	State Compliance achieved	17-JUN-2010	Region	-

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CXN TO SICANGU MNI WICONI N. TAFT	12568	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL #3	12049	Yes	Well	Ground water	Permanent	Inactive
WELL #2	12048	Yes	Well	Ground water	Permanent	Inactive
WELL #1	12047	Yes	Well	Ground water	Permanent	Inactive
CXN TO SICANGU MNI WICONI N. WASHINGTON	12892	Yes	Consecutive Connection	Surface water	Permanent	Active
CXN TO SICANGU MNI WICONI US 83 AND 3RD	12893	Yes	Consecutive Connection	Surface water	Permanent	Active
CITY OF MISSION DISTRIBUTION	12053	No	Distribution System/Zone	-	-	Active
SO ANTELOPE DISTRIBUTION	12505	No	Distribution System/Zone	-	-	Inactive
SDDENR DATA	12064	No	Other	-	-	Inactive
LEROY COOK HOME (1ST CUSTOMER) (SP01)	12065	No	Other	-	-	Inactive
RAW WATER STEEL TANK (240K)	12050	No	Storage	-	-	Inactive
BIA TOWER STEEL (150K)	12051	No	Storage	-	-	Inactive
SO ANTELOPE STORAGE TANK (20K)	12506	No	Storage	-	-	Inactive
MISSION TREATMENT PLANT	12052	No	Treatment Plant	-	-	Inactive
SO ANTELOPE ASSOCIATED TO SP02	12504	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
MISSION TREATMENT PLANT	12052	Fluoridation	Other
MISSION TREATMENT PLANT	12052	Gaseous Chlorination, Post	Disinfection
SO ANTELOPE ASSOCIATED TO SP02	12504	Hypochlorination, Post	Disinfection

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