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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	918	Returned to Compliance	01-APR-2023	30-APR-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	917	Returned to Compliance	01-APR-2023	30-APR-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	916	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	915	Returned to Compliance	01-JAN-2023	31-MAR-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	914	Returned to Compliance	01-SEP-2021	30-NOV-2021	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	913	Returned to Compliance	01-SEP-2021	30-NOV-2021	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	911	Returned to Compliance	01-JUN-2020	31-AUG-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	912	Returned to Compliance	01-JUN-2020	31-AUG-2020	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	909	Returned to Compliance	01-NOV-2012	30-NOV-2012	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	907	Returned to Compliance	01-OCT-2010	31-OCT-2010	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	906	Known	01-JUN-2006	30-JUN-2006	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	503	Known	01-OCT-2002	31-OCT-2002	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	294	Known	01-JAN-1994	31-JAN-1994	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	194	Known	01-NOV-1993	30-NOV-1993	No

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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
129	916	SOX	State Compliance achieved	22-FEB-2024	Region	Samples collected on 5/1/2023. SWT 2/22/2024
129	915	SOX	State Compliance achieved	22-FEB-2024	Region	Samples collected on 5/1/2023. SWT 2/22/2024
123	917	SOX	State Compliance achieved	05-JUN-2023	Region	-
126	918	SOX	State Compliance achieved	27-MAY-2023	Region	PWS RTC'd when they collected more than 6 samples in May 2023. JSH 8/15/23
118	913	SIF	State Public Notification received	07-JUL-2022	Region	Received in the CCR. swt 7/7/2022
118	914	SIF	State Public Notification received	07-JUL-2022	Region	Received in the CCR. swt 7/7/2022
114	912	SOX	State Compliance achieved	05-NOV-2021	Region	Compliance Achieved. swt 11/5/2021
114	911	SOX	State Compliance achieved	05-NOV-2021	Region	Compliance Achieved. swt 11/5/2021
109	909	SIF	State Public Notification received	27-JUN-2013	Region	-
105	907	SOX	State Compliance achieved	23-NOV-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
CHEYENNE BOARD PUB UTILITIES (WY5600011)	14324	Yes	Consecutive Connection	Surface water	Permanent	Active
U.S. AIR FORCE, FE WARREN AFB	14325	No	Distribution System/Zone	-	-	Active
U.S. AIR FORCE, FE WARREN AFB	11731	No	Other	-	-	Inactive

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Treatment Processes

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No treatment process(es) found. EPA has no record of treatment process(es) reported by the primacy agency for this water system.

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