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PWS ID	MT0000018
PWS Name	ST LABRE INDIAN SCHOOL
PWS Type	Community water system
Owner Type	Private
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	650
County Served	Rosebud

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
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477234	Returned to Compliance	01-OCT-2025	31-DEC-2025	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4477233	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477232	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477228	Returned to Compliance	01-JUL-2024	30-SEP-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477227	Returned to Compliance	01-APR-2024	30-JUN-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477226	Returned to Compliance	01-JAN-2024	31-MAR-2024	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	4477230	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477224	Returned to Compliance	01-OCT-2023	31-DEC-2023	Yes
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	4477223	Returned to Compliance	01-OCT-2023	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477222	Returned to Compliance	01-JUL-2023	30-SEP-2023	Yes
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4477221	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477220	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477219	Returned to Compliance	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477164	Returned to Compliance	01-JUL-2022	30-SEP-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477163	Returned to Compliance	01-APR-2022	30-JUN-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477162	Returned to Compliance	01-JAN-2022	31-MAR-2022	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477159	Returned to Compliance	01-OCT-2021	31-DEC-2021	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4477157	Returned to Compliance	01-OCT-2021	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477158	Returned to Compliance	01-JUL-2021	30-SEP-2021	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4477154	Returned to Compliance	01-APR-2021	30-JUN-2021	Yes
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	4477150	Returned to Compliance	01-OCT-2020	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	4477191	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	4477190	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	4477189	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	4477188	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	4477187	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	4477186	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	4477185	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	4477184	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	4477183	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	4477182	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	4477181	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	4477180	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	4477179	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	4477178	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	4477177	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	4477176	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	4477175	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	4477173	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	4477172	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	4477171	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	4477218	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	4477217	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	4477216	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	4477215	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	4477214	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	4477213	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	4477212	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	4477211	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	4477210	Returned to Compliance	01-JAN-2020	31-DEC-2022	No

1 - 50 of 221

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
4474497	4477234	SOX	State Compliance achieved	02-DEC-2025	State	TTHM sample taken on 2/10/2026 brought the RAA down to 64ug/L. System has RTC. PMT 4/1/26
4474491	4477232	SIF	State Public Notification received	24-APR-2025	State	Received PN 4/24/25-PMT 4/24/25
4474491	4477233	SIF	State Public Notification received	24-APR-2025	State	Received PN 4/24/25-PMT 4/24/25
4474480	4477230	SOX	State Compliance achieved	30-JAN-2025	State	02/14/2025 sample taken 01/30/2025 GEM
4474467	4477228	SOX	State Compliance achieved	20-DEC-2024	State	TTHM sample taken on 2/10/2026 brought the RAA down to 64ug/L. System has RTC. PMT 4/1/26
4474464	4477227	SIF	State Public Notification received	16-JUL-2024	State	Public Notice received 7/15/2024 - CEO 7/16/24
4474442	4477223	SOX	State Compliance achieved	17-APR-2024	State	04/26/2024 System sent in CCR and CCR Certification 04/17/2024 GEM
4474456	4477226	SIF	State Public Notification received	08-APR-2024	State	Public Notice Received 04/08/2024 CEO
4474446	4477224	SOX	State Compliance achieved	12-FEB-2024	State	TTHM sample taken on 2/10/2026 brought the RAA down to 64ug/L. System has RTC. PMT 4/1/26
4474438	4477222	SOX	State Compliance achieved	04-OCT-2023	State	TTHM sample taken on 2/10/2026 brought the RAA down to 64ug/L. System has RTC. PMT 4/1/26
4474435	4477221	SOX	State Compliance achieved	07-SEP-2023	State	Completed sampling 9/7/23. SOXed violation-MRF(10/11/23)
4474435	4477220	SOX	State Compliance achieved	07-SEP-2023	State	Completed sampling 9/7/23. SOXed violation-MRF(10/11/23)
4474430	4477219	SOX	State Compliance achieved	27-JUN-2023	State	TTHM sample taken on 2/10/2026 brought the RAA down to 64ug/L. System has RTC. PMT 4/1/26
4474388	4477170	SOX	State Compliance achieved	02-FEB-2023	State	-
4474388	4477171	SOX	State Compliance achieved	02-FEB-2023	State	-
4474388	4477172	SOX	State Compliance achieved	02-FEB-2023	State	-
4474388	4477173	SOX	State Compliance achieved	02-FEB-2023	State	-
4474388	4477174	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477175	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477176	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477177	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477178	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477179	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477180	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477181	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477182	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477183	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477184	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477185	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477186	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477187	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477188	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477189	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477190	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477191	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477192	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477193	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477194	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477195	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477196	SOX	State Compliance achieved	02-FEB-2023	State	-
4474424	4477197	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477198	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477199	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477200	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477201	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477202	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477203	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477204	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477205	SOX	State Compliance achieved	02-FEB-2023	State	-
4474427	4477206	SOX	State Compliance achieved	02-FEB-2023	State	-

1 - 50 of 214

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 7 2010 GWIC 259391	19881	Yes	Well	Ground water	Permanent	Active
WELL 4 ARTISIAN ABANDONED	7116	Yes	Well	Ground water	Permanent	Inactive
WELL 2 HARD IRRIGATION	6539	Yes	Well	Ground water	Permanent	Inactive
WELL 1 EMERGENCY ABANDONED	6538	Yes	Well	Ground water	Permanent	Inactive
WELL 6 1996 SOFT	13479	Yes	Well	Ground water	Permanent	Inactive
WELL 5 1996 HARD	13478	Yes	Well	Ground water	Permanent	Inactive
WELL 3 1979 SOFT GWIC 98552	6817	Yes	Well	Ground water	Permanent	Active
WELL 9 2014 GWIC 277350	21375	Yes	Well	Ground water	Permanent	Active
WELL8 2010 GWIC 259390	19882	Yes	Well	Ground water	Permanent	Active
COMMON HEADER WELLS 3, 7, 8, 9	19883	No	Common Headers	-	-	Active
COMMON HEADER WELLS 3 5 6	17182	No	Common Headers	-	-	Inactive
CLEARWELL	14643	No	Clear Well	-	-	Inactive
DISTRIBUTION SYSTEM	7778	No	Distribution System/Zone	-	-	Active
PUMP FACILITY BOOSTER TANK TO DIST.	20147	No	Pump Facility	-	-	Active
STORAGE FACILITY 330,000	20146	No	Storage	-	-	Active
STORAGE FACILITY 2500	13480	No	Storage	-	-	Inactive
STORAGE FACILITY 200000	19303	No	Storage	-	-	Inactive
TREATMENT PLANT 2015	2936	No	Treatment Plant	-	-	Active
TREATMENT PLANT	2579	No	Treatment Plant	-	-	Inactive

1 - 19 of 19

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	2579	Gaseous Chlorination, Pre	Disinfection
TREATMENT PLANT	2579	Filtration, Pressure Sand	Iron removal
TREATMENT PLANT	2579	Sedimentation	Iron removal
TREATMENT PLANT 2015	2936	Hypochlorination, Post	Disinfection
TREATMENT PLANT 2015	2936	Lime - Soda Ash Addition	Softening (hardness removal)
TREATMENT PLANT 2015	2936	Innovative	Disinfection

1 - 6 of 6

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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