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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
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	1216	Returned to Compliance	01-JUN-2024	30-JUN-2024	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1214	Returned to Compliance	01-JAN-2016	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1208	Returned to Compliance	01-JUL-2015	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1213	Returned to Compliance	01-JUL-2015	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1207	Returned to Compliance	01-APR-2011	30-APR-2011	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	1005	Returned to Compliance	01-JUL-2005	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	603	Known	01-AUG-2002	31-AUG-2002	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	402	Returned to Compliance	01-JUL-2000	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	195	Known	01-JUN-1995	30-JUN-1995	Yes
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	295	Known	01-AUG-1994	31-AUG-1994	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	194	Known	01-JUN-1994	30-JUN-1994	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	192	Known	01-JUN-1992	30-JUN-1992	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
78523	1216	SOX	State Compliance achieved	22-JUL-2024	Region	System collected required chlorine residual samples in July 2024. 7/22/2024. jc
78519	1214	SOX	State Compliance achieved	25-NOV-2016	Region	-
78520	1213	SOX	State Compliance achieved	25-NOV-2016	Region	-
78510	1208	SOX	State Compliance achieved	08-SEP-2015	Region	-
78507	1207	SIA	State Violation/Reminder Notice	25-MAY-2011	Region	-
78506	1005	SOX	State Compliance achieved	02-AUG-2006	Region	-
78002	402	SOX	State Compliance achieved	09-JUL-2002	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
SOUTH BIG HORN COUNTY JPB (WY5601454)	17067	Yes	Consecutive Connection	Ground water	Permanent	Active
TOWN OF BASIN	11820	No	Distribution System/Zone	-	-	Active
BASIN, TOWN OF	14497	No	Other	-	-	Inactive
STORAGE TANK (1MG)	19398	No	Storage	-	-	Active
SMALL TANK (250K)	16182	No	Storage	-	-	Inactive
LARGE TANK (750K)	16183	No	Storage	-	-	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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