GREAT FALLS, MT · Cascade County
SUN PRAIRIE WATER DISTRICT Water System
Consumer Confidence Report status
SUN PRAIRIE WATER DISTRICT must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for SUN PRAIRIE WATER DISTRICT.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Montana’s official records. Always confirm current status with Montana before making decisions based on this information.
System facts
- System ID (PWSID)
- MT0000571
- System type
- Community Water System
- Population served
- 350
- Service connections
- 103
- Ownership
- local government
- Water source
- groundwater (wells)
SUN PRAIRIE WATER DISTRICT is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 350 people from groundwater.
As of August 1, 2026, its federal record holds 75 entries between 1995 and 2025, all of which EPA lists as closed.
Of the 75, 68 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, volatile organic chemicals, and the Total Coliform Rules.
Violation history
Monitoring, Regular
—Nitrate-Nitrite
January 1, 2025 – December 31, 2025
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2023 – November 1, 2023
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2023 – October 19, 2023
ResolvedMonitoring, Regular
—o-Dichlorobenzene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Heptachlor
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Heptachlor epoxide
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—2,4-D
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Pentachlorophenol
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Chlordane
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Xylenes, Total
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—p-Dichlorobenzene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Vinyl chloride
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,2-Dichloroethane
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Carbon tetrachloride
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Tetrachloroethylene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Benzene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Toluene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Ethylbenzene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Styrene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Endrin
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—BHC-GAMMA
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Methoxychlor
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Toxaphene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Dalapon
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—OXAMYL
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Simazine
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Picloram
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Dinoseb
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Carbofuran
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—Atrazine
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Regular
—LASSO
January 1, 2023 – December 31, 2025
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
December 1, 2021 – December 31, 2021
ResolvedConsumer Confidence Report Inadequate Reporting
—Consumer Confidence Rule
October 1, 2021 – October 28, 2021
ResolvedLead Consumer Notice
—Lead and Copper Rule
December 30, 2020 – January 25, 2021
ResolvedMonitoring, Regular
—Thallium, Total
January 1, 2020 – December 31, 2022
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
February 1, 2019 – February 28, 2019
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2018 – October 17, 2018
ResolvedMonitoring, Regular
—Combined Radium (-226 and -228)
January 1, 2017 – December 31, 2025
ArchivedSample Siting Plan Errors (RTCR)
—Revised Total Coliform Rule
April 2, 2016 – November 25, 2020
ResolvedLead Consumer Notice
—Lead and Copper Rule
December 30, 2014 – May 8, 2015
ResolvedMonitoring and Reporting (DBP)
—Chlorine
January 1, 2012 – March 31, 2012
ResolvedMonitoring and Reporting (DBP)
—TTHM
July 1, 2009 – September 30, 2009
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
July 1, 2009 – September 30, 2009
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2006 – March 1, 2007
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2005 – April 18, 2007
ResolvedMonitoring, Regular
—Arsenic
January 1, 1999 – December 31, 2001
ResolvedMonitoring, Regular
—Nitrate
January 1, 1998 – December 31, 1998
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
July 1, 1996 – July 31, 1996
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
June 1, 1996 – June 30, 1996
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 1996 – May 31, 1996
ResolvedMonitoring, Regular
—2,4,5-TP
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Dalapon
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Simazine
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Benzo(a)pyrene
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Aldicarb
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Atrazine
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Endrin
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—2,4-D
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Repeat Major (TCR)
—Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2025 – December 31, 2025 | Monitoring, Regular | Nitrate-Nitrite | — | Resolved |
| October 1, 2023 – November 1, 2023 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| July 1, 2023 – October 19, 2023 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | o-Dichlorobenzene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Heptachlor | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Heptachlor epoxide | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Chlordane | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | p-Dichlorobenzene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Vinyl chloride | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,2-Dichloroethane | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Carbon tetrachloride | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Tetrachloroethylene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Ethylbenzene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Styrene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Endrin | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | BHC-GAMMA | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Methoxychlor | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Toxaphene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Dalapon | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | OXAMYL | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Simazine | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Picloram | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Dinoseb | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Carbofuran | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Atrazine | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | LASSO | — | Resolved |
| December 1, 2021 – December 31, 2021 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| October 1, 2021 – October 28, 2021 | Consumer Confidence Report Inadequate Reporting | Consumer Confidence Rule | — | Resolved |
| December 30, 2020 – January 25, 2021 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| January 1, 2020 – December 31, 2022 | Monitoring, Regular | Thallium, Total | — | Resolved |
| February 1, 2019 – February 28, 2019 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| July 1, 2018 – October 17, 2018 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| January 1, 2017 – December 31, 2025 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Archived |
| April 2, 2016 – November 25, 2020 | Sample Siting Plan Errors (RTCR) | Revised Total Coliform Rule | — | Resolved |
| December 30, 2014 – May 8, 2015 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| January 1, 2012 – March 31, 2012 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| July 1, 2009 – September 30, 2009 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| July 1, 2009 – September 30, 2009 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| July 1, 2006 – March 1, 2007 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| July 1, 2005 – April 18, 2007 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| January 1, 1999 – December 31, 2001 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 1998 – December 31, 1998 | Monitoring, Regular | Nitrate | — | Resolved |
| July 1, 1996 – July 31, 1996 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| June 1, 1996 – June 30, 1996 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
| May 1, 1996 – May 31, 1996 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Dalapon | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Simazine | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Benzo(a)pyrene | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Aldicarb | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Atrazine | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Endrin | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | 2,4-D | — | Resolved |
| September 1, 1995 – September 30, 1995 | Monitoring, Repeat Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- January 24, 2026State Public Notification requested21 linked violations
- January 24, 2026State Public Notification requested1 linked violation
- January 24, 2026State Violation/Reminder Notice1 linked violation
- January 24, 2026State Violation/Reminder Notice21 linked violations
- January 22, 2026State Violation/Reminder Notice24 linked violations
- January 22, 2026State Public Notification requested23 linked violations
- January 14, 2026State Compliance achieved23 linked violations
- January 14, 2026State Compliance achieved1 linked violation
- January 14, 2026State Compliance achieved21 linked violations
- January 13, 2026State Violation/Reminder Notice1 linked violation
- January 13, 2026State Public Notification requested1 linked violation
- November 1, 2023State Compliance achieved1 linked violation
- October 19, 2023State Compliance achieved1 linked violation
- October 13, 2023State Violation/Reminder Notice1 linked violation
- August 9, 2023State Compliance achieved1 linked violation
- July 11, 2023State Violation/Reminder Notice1 linked violation
- January 25, 2023State Public Notification requested1 linked violation
- January 25, 2023State Violation/Reminder Notice1 linked violation
- February 3, 2022State Public Notification requested1 linked violation
- February 3, 2022State Violation/Reminder Notice1 linked violation
- January 11, 2022State Compliance achieved1 linked violation
- October 28, 2021State Compliance achieved1 linked violation
- October 15, 2021State Violation/Reminder Notice1 linked violation
- January 25, 2021State Compliance achieved1 linked violation
- January 7, 2021State Violation/Reminder Notice1 linked violation
- November 25, 2020State Compliance achieved1 linked violation
- March 19, 2019State Compliance achieved1 linked violation
- March 15, 2019State Public Notification requested1 linked violation
- March 15, 2019State Violation/Reminder Notice1 linked violation
- October 17, 2018State Compliance achieved1 linked violation
- July 17, 2018State Violation/Reminder Notice1 linked violation
- January 4, 2017State Violation/Reminder Notice1 linked violation
- January 4, 2017State Public Notification requested1 linked violation
- May 8, 2015State Compliance achieved1 linked violation
- January 26, 2015State Violation/Reminder Notice1 linked violation
- February 19, 2013State Compliance achieved1 linked violation
- April 13, 2012State Violation/Reminder Notice1 linked violation
- April 13, 2012State Public Notification requested1 linked violation
- October 21, 2010State Compliance achieved2 linked violations
- January 24, 2010State Public Notification requested2 linked violations
- January 24, 2010State Violation/Reminder Notice2 linked violations
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- May 15, 2009State Compliance achieved2 linked violations
- April 18, 2007State Compliance achieved1 linked violation
- March 1, 2007State Compliance achieved1 linked violation
- February 5, 2007State Violation/Reminder Notice1 linked violation
- July 25, 2006State Other1 linked violation
- August 16, 2005State Violation/Reminder Notice1 linked violation
- September 5, 2002State Public Notification received1 linked violation
- July 25, 2002State Violation/Reminder Notice2 linked violations
- July 25, 2002State Public Notification requested1 linked violation
- July 12, 2002State Violation/Reminder Notice4 linked violations
- July 12, 2002State Public Notification requested4 linked violations
- May 18, 2001State Compliance achieved25 linked violations
- July 3, 1997State Violation/Reminder Notice4 linked violations
- July 18, 1996State Violation/Reminder Notice1 linked violation
- September 17, 1993State Violation/Reminder Notice19 linked violations
Common questions
Is SUN PRAIRIE WATER DISTRICT required to publish a Consumer Confidence Report?
- Yes. SUN PRAIRIE WATER DISTRICT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SUN PRAIRIE WATER DISTRICT’s next Consumer Confidence Report due?
- SUN PRAIRIE WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SUN PRAIRIE WATER DISTRICT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SUN PRAIRIE WATER DISTRICT.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
SUN PRAIRIE COUNTY WATER DISTRICT
406-964-0106
GREAT FALLS, MT 59404