ROSEBUD RURAL WATER SYSTEM

Q: Is ROSEBUD RURAL WATER SYSTEM water safe to drink?

ROSEBUD RURAL WATER SYSTEM (PWS ID: 084690528) has 132 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,500 people using Groundwater sources.

Q: What type of violations does ROSEBUD RURAL WATER SYSTEM have?

ROSEBUD RURAL WATER SYSTEM has 132 total violations: 3 health-based violations (MCL exceedances or treatment failures), 126 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in ROSEBUD RURAL WATER SYSTEM water?

No. ROSEBUD RURAL WATER SYSTEM was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does ROSEBUD RURAL WATER SYSTEM use?

ROSEBUD RURAL WATER SYSTEM uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 5, 2026

PWS ID: 084690528 · ROSEBUD, 08 57570

ROSEBUD RURAL WATER SYSTEM serves 5,500 people in ROSEBUD, 08 using Groundwater water sources. It has 132 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: ROSEBUD RURAL WATER SYSTEM

ROSEBUD RURAL WATER SYSTEM is a native american-owned community water system that delivers drinking water to 5,500 residents in ROSEBUD, 08 through 1,686 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 132 total violations for this system , of which 3 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 126 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 6 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across 08, EPA tracks 160 public water systems serving 144,980 people, with 13,068 cumulative violations and 1,547 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 81.7 violations. ROSEBUD RURAL WATER SYSTEM's 132 violations sit above the 08 average. Statewide, 10 of 13 UCMR5-tested systems have reported PFAS detections (76.9%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served

5,500

Total Violations

132

Health-Based Violations

Water Source

Groundwater

System Details

System Type: Community
Owner Type: Native American
Connections: 1,686
School/Daycare: No
MCL Violations: 1
Monitoring Violations: 126
Treatment Tech Violations: 2

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	6	2013
BHC-GAMMA	MR	3	2020
CYANIDE	MR	3	2020
Benzene	MR	2	2020
Carbon tetrachloride	MR	2	2020
1,2-Dichloroethane	MR	2	2020
p-Dichlorobenzene	MR	2	2020
1,2-Dichloropropane	MR	2	2020
Ethylbenzene	MR	2	2020
CHLOROBENZENE	MR	2	2020
o-Dichlorobenzene	MR	2	2020
Xylenes, Total	MR	2	2020
DICHLOROMETHANE	MR	2	2020
Chlorine	MR	2	2012
Fluoride	MR	2	2020
ETHYLENE DIBROMIDE	MR	2	2020
1,2-DIBROMO-3-CHLOROPROPANE	MR	2	2020
Dinoseb	MR	2	2020
Simazine	MR	2	2020
Toxaphene	MR	2	2020
Heptachlor epoxide	MR	2	2020
Pentachlorophenol	MR	2	2020
Atrazine	MR	2	2020
Picloram	MR	2	2020
Di(2-ethylhexyl) adipate	MR	2	2020
Glyphosate	MR	2	2020
OXAMYL	MR	2	2020
HEXACHLOROBENZENE	MR	2	2020
Di(2-ethylhexyl) phthalate	MR	2	2020
Heptachlor	MR	2	2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 30 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
HFPO-DA	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFHxS	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	6/4/2025	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	6/4/2025	<0.008 µg/L	0.008 µg/L	Not Detected
PFHpS	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeS	6/4/2025	<0.004 µg/L	0.004 µg/L	Not Detected
NFDHA	6/4/2025	<0.02 µg/L	0.02 µg/L	Not Detected
PFEESA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFPeA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFMPA	6/4/2025	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected
4:2 FTS	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
NEtFOSAA	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected
NMeFOSAA	6/4/2025	<0.006 µg/L	0.006 µg/L	Not Detected
11Cl-PF3OUdS	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected
PFUnA	6/4/2025	<0.002 µg/L	0.002 µg/L	Not Detected
PFHxA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	6/4/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	6/4/2025	<0.004 µg/L	0.004 µg/L	Not Detected
lithium	6/4/2025	<9 µg/L	9 µg/L	Not Detected
ADONA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	6/4/2025	<0.002 µg/L	0.002 µg/L	Not Detected
PFNA	6/4/2025	<0.004 µg/L	0.004 µg/L	Not Detected
PFHpA	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	6/4/2025	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	6/4/2025	<0.005 µg/L	0.005 µg/L	Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for ROSEBUD RURAL WATER SYSTEM.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID 084690528 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

08 Drinking Water Authority

08's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 08 regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest)	Contaminant	Category	Count	EPA Record
2024	LEAD AND COPPER RULE REVISIONS	RPT	1	SDWIS / 084690528 / 5200
2024	LEAD AND COPPER RULE REVISIONS	TT	1	SDWIS / 084690528 / 5200
2023	Revised Total Coliform Rule	RPT	2	SDWIS / 084690528 / 8000
2021	Groundwater Rule	TT	1	SDWIS / 084690528 / 0700
2020	BHC-GAMMA	MR	3	SDWIS / 084690528 / 2010
2020	CYANIDE	MR	3	SDWIS / 084690528 / 1024
2020	Benzene	MR	2	SDWIS / 084690528 / 2990
2020	Carbon tetrachloride	MR	2	SDWIS / 084690528 / 2982
2020	1,2-Dichloroethane	MR	2	SDWIS / 084690528 / 2980
2020	p-Dichlorobenzene	MR	2	SDWIS / 084690528 / 2969
2020	1,2-Dichloropropane	MR	2	SDWIS / 084690528 / 2983
2020	Ethylbenzene	MR	2	SDWIS / 084690528 / 2992
2020	CHLOROBENZENE	MR	2	SDWIS / 084690528 / 2989
2020	o-Dichlorobenzene	MR	2	SDWIS / 084690528 / 2968
2020	Xylenes, Total	MR	2	SDWIS / 084690528 / 2955

How ROSEBUD RURAL WATER SYSTEM Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric	ROSEBUD RURAL WATER SYSTEM	08 avg	Federal benchmark
Total violations	132	81.7	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	3	9.7	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	76.9%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	5,500	906	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 160 regulated public water systems in 08.

Federal MCL reference — Safe Drinking Water Act thresholds ▼

Contaminant	Federal MCL / Action Level	Note
Lead	0 mg/L (Action Level: 0.015 mg/L)	Lead and Copper Rule treatment technique
Arsenic	0.010 mg/L (10 ppb)	Health-based MCL since 2006
Total Coliform	Treatment technique (RTCR)	Indicator organism, monitoring trigger
PFOA / PFOS (PFAS)	4.0 ppt each (final 2024 rule)	Compliance deadline 2029
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is ROSEBUD RURAL WATER SYSTEM water safe to drink? ▼

ROSEBUD RURAL WATER SYSTEM (PWS ID: 084690528) has 132 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 5,500 people using Groundwater sources.

How many people does ROSEBUD RURAL WATER SYSTEM serve? ▼

ROSEBUD RURAL WATER SYSTEM serves 5,500 people in ROSEBUD, 08. It is a Native American-owned system using Groundwater water sources with 1,686 service connections.

What type of violations does ROSEBUD RURAL WATER SYSTEM have? ▼

ROSEBUD RURAL WATER SYSTEM has 132 total violations: 3 health-based violations (MCL exceedances or treatment failures), 126 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in ROSEBUD RURAL WATER SYSTEM water? ▼

No. ROSEBUD RURAL WATER SYSTEM was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does ROSEBUD RURAL WATER SYSTEM use? ▼

ROSEBUD RURAL WATER SYSTEM uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from? ▼

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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