Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MT0002385
PWS Name	BIG SKY COUNTY WATER AND SEWER DIST 363
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	4132
County Served	Madison

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	Nitrate Rule	Nitrate-Nitrite	5583530	Returned to Compliance	01-APR-2025	30-JUN-2025	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	5583528	Returned to Compliance	01-JUL-2020	-	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	5583529	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	5583524	Returned to Compliance	01-JUL-2014	-	No
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	5583522	Returned to Compliance	01-JAN-2014	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5583511	Returned to Compliance	01-JAN-2012	31-JAN-2012	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	5583516	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	5583523	Returned to Compliance	01-JAN-2011	31-DEC-2013	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	5583310	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	5583210	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	5583510	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate-Nitrite	5583410	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5582908	Returned to Compliance	01-SEP-2008	30-SEP-2008	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	5582808	Returned to Compliance	01-AUG-2008	31-AUG-2008	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	5582708	Returned to Compliance	01-JUL-2008	31-JUL-2008	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	5583525	Known	01-JAN-2008	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5583526	Known	01-JAN-2008	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	5583527	Known	01-JAN-2008	31-DEC-2016	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5582406	Returned to Compliance	01-OCT-2005	31-OCT-2005	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5582305	Returned to Compliance	01-AUG-2005	31-AUG-2005	Yes
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	5582205	Returned to Compliance	01-JUL-2005	31-JUL-2005	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	5581504	Returned to Compliance	01-OCT-2003	31-OCT-2003	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	487399	Returned to Compliance	01-FEB-1999	28-FEB-1999	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	43499	Returned to Compliance	01-JAN-1999	31-JAN-1999	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	563497	Returned to Compliance	01-APR-1997	30-APR-1997	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	801699	Returned to Compliance	01-JAN-1997	31-DEC-1997	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	5581196	Returned to Compliance	01-AUG-1996	31-AUG-1996	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1465496	Returned to Compliance	01-JAN-1994	31-DEC-1994	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	582094	Returned to Compliance	01-JAN-1994	-	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	252592	Returned to Compliance	01-AUG-1992	31-AUG-1992	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	269292	Returned to Compliance	01-AUG-1992	31-AUG-1992	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	220992	Returned to Compliance	01-JUL-1992	31-JUL-1992	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	161692	Returned to Compliance	01-APR-1992	30-APR-1992	Yes

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
5016551	5583530	SIE	State Public Notification requested	23-JUL-2025	State	-
5016549	5583529	SOX	State Compliance achieved	28-OCT-2024	State	-
5016546	5583528	SOX	State Compliance achieved	03-AUG-2020	State	8/3/2020 2019 CCR received, SJP;
5016535	5583524	SOX	State Compliance achieved	08-AUG-2014	State	-
5016533	5583523	SOX	State Compliance achieved	28-MAY-2014	State	-
5016524	5583522	SOX	State Compliance achieved	26-MAR-2014	State	-
5016520	5583516	SIE	State Public Notification requested	18-JAN-2013	State	-
5016517	5583511	SOX	State Compliance achieved	06-FEB-2012	State	-
5016511	5583510	SOX	State Compliance achieved	27-JAN-2010	State	Samples collected 9/17/2009 and received 1/26/2010. LRA 1/27/2010
5016511	5583410	SOX	State Compliance achieved	27-JAN-2010	State	Samples collected 9/17/2009 and received 1/26/2010. LRA 1/27/2010
5016511	5583210	SOX	State Compliance achieved	27-JAN-2010	State	Samples collected 9/17/2009 and received 1/26/2010. LRA 1/27/2010
5016511	5583310	SOX	State Compliance achieved	27-JAN-2010	State	Samples collected 9/17/2009 and received 1/26/2010. LRA 1/27/2010
5015709	5582908	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	5582708	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	5582406	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	5582205	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	5581504	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	563497	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	487399	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015709	43499	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5014408	5582808	SOX	State Compliance achieved	29-MAY-2009	State	-
5015709	5582305	SOX	State Compliance achieved	29-MAY-2009	State	6 mo. no MR or MCL violations, RTC. S Paquin
5015509	1465496	SOX	State Compliance achieved	15-MAY-2009	State	SOX-RTC MIGRATION 5/15/09
5015609	801699	SOX	State Compliance achieved	15-MAY-2009	State	SOX-RTC MIGRATION 5/15/09
5015409	5581196	SOX	State Compliance achieved	08-JAN-2009	State	6 months no MCL or MR violations. LRA 1/8/2009
5015409	269292	SOX	State Compliance achieved	08-JAN-2009	State	6 months no MCL or MR violations. LRA 1/8/2009
5015409	252592	SOX	State Compliance achieved	08-JAN-2009	State	6 months no MCL or MR violations. LRA 1/8/2009
5015409	220992	SOX	State Compliance achieved	08-JAN-2009	State	6 months no MCL or MR violations. LRA 1/8/2009
5015409	161692	SOX	State Compliance achieved	08-JAN-2009	State	6 months no MCL or MR violations. LRA 1/8/2009
64297	582094	SOX	State Compliance achieved	03-DEC-1996	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL MTNV 7 GWIC 205931	16113	Yes	Well	Ground water	Permanent	Active
WELL HIDDEN VILLAGE 2 HV 2	19089	Yes	Well	Ground water	Permanent	Inactive
WELL HIDDEN VILLAGE 1 HV 1	19088	Yes	Well	Ground water	Permanent	Inactive
WELL BLUE GROUSE 1 BG 1	19087	Yes	Well	Ground water	Permanent	Inactive
WELL ASPEN GROVE 3	19076	Yes	Well	Ground water	Permanent	Inactive
WELL ASPEN GROVE 2	19075	Yes	Well	Ground water	Permanent	Inactive
WELL ASPEN GROVE 1	19074	Yes	Well	Ground water	Permanent	Inactive
WELL MTNV 5 CASCADE 5 GWIC 248989	7368	Yes	Well	Ground water	Permanent	Active
WELL MTNV 6 CASCADE 6 GWIC 244347	6546	Yes	Well	Ground water	Permanent	Active
WELL MTNV 1 GWIC 108809	6259	Yes	Well	Ground water	Permanent	Active
WELL MTNV 3 GWIC 108811	6205	Yes	Well	Ground water	Permanent	Active
WELL MTNV 2 GWIC 108810	6145	Yes	Well	Ground water	Permanent	Active
WELL MTNV 4 GWIC 103496	5827	Yes	Well	Ground water	Permanent	Active
WELL MEADOW VILLAGE 5 MDW 5 GWIC 236778	19091	Yes	Well	Ground water	Permanent	Active
WELL MEADOW VILLAGE 4 MDV 4 GWIC 236777	19090	Yes	Well	Ground water	Permanent	Active
WELL MEADOW VILLAGE MDV 3 GWIC 166989	19086	Yes	Well	Ground water	Permanent	Active
WELL MEADOW VILLAGE MDV 2 GWIC 103507	19085	Yes	Well	Ground water	Permanent	Active
WELL MEADOW VILLAGE MDV 1 GWIC 103505	19084	Yes	Well	Ground water	Permanent	Active
WELL LONE MOOSE 2 GWIC 187212	19069	Yes	Well	Ground water	Permanent	Active
WELL LONE MOOSE 1 GWIC 170083	19068	Yes	Well	Ground water	Permanent	Active
COMMON HEADER MTNV WL 1 2 3 4 7	12610	No	Common Headers	-	-	Active
COMMON HEADER WL MTNV CASCADES 5 6	12611	No	Common Headers	-	-	Active
COMMON HEADER LONE MOOSE 1 2 EP504	17926	No	Common Headers	-	-	Active
COMMON HEADER MEADOW VILLAGE 1,2,3,4,5	19077	No	Common Headers	-	-	Active
COMMON HEADER ASPEN GROVES 1 2 3	19072	No	Common Headers	-	-	Inactive
COMMON HEADER MEADOW VILLAGE 4 & 5	21495	No	Common Headers	-	-	Inactive
CISTERN HILL	19066	No	Cistern	-	-	Inactive
CISTERN CASCADE	19067	No	Cistern	-	-	Inactive
ENTIRE DISTRIBUTION SYSTEM	7893	No	Distribution System/Zone	-	-	Active
WHITE BUTTE PRESSURE CONTROL	19446	No	Pressure Control	-	-	Inactive
PINES PRESSURE CONTROL	19447	No	Pressure Control	-	-	Inactive
HILL BOOSTER STATION	15318	No	Pump Facility	-	-	Active
CASCADE BOOSTER STATION	15319	No	Pump Facility	-	-	Active
WHITE BUTTE PUMP FAC & PRESSURE CNTRL	17923	No	Pump Facility	-	-	Active
MEADOW VILLAGE BOOSTER STATION	18042	No	Pump Facility	-	-	Active
SWEET GRASS BOOSTER STATION	19078	No	Pump Facility	-	-	Active
HIDDEN VILLAGE BOOSTER STATION	19079	No	Pump Facility	-	-	Active
PINES PUMP FAC & PRESSURE CNTRL	19080	No	Pump Facility	-	-	Active
CASCADE 1.5 MG STORAGE TANK	15320	No	Storage	-	-	Active
LONE MOOSE 460 K STORAGE TANK	19070	No	Storage	-	-	Active
ASPEN GROVE 260 K STORAGE TANK	19071	No	Storage	-	-	Active
SWEET GRASS 250 K STORAGE TANK	19081	No	Storage	-	-	Active
SWEET GRASS 50 K STORAGE TANK	19082	No	Storage	-	-	Active
HIDDEN VILLAGE 1 MG STORAGE TANK	19083	No	Storage	-	-	Active
HILL 10 K BOOSTER STATION	19448	No	Storage	-	-	Active
CASCADE 10 K BOOSTER STATION	19449	No	Storage	-	-	Active
MTN VILLAGE 500K STORAGE	1777	No	Storage	-	-	Inactive
TRANSMISSION MAIN 8 IN	15321	No	Transmission Main (Manifold)	-	-	Active
UV TREATMENT PLANT EP513	21536	No	Treatment Plant	-	-	Active
TREATMENT PLANT 1 ASPEN GROVES EP507	19073	No	Treatment Plant	-	-	Inactive

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT 1 ASPEN GROVES EP507	19073	Ultraviolet Radiation	Disinfection
UV TREATMENT PLANT EP513	21536	Ultraviolet Radiation	Disinfection

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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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