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STANDING ROCK RURAL WATER SYSTEM

PWS ID: 084690510 · FORT YATES, 08 58538

STANDING ROCK RURAL WATER SYSTEM serves 6,839 people in FORT YATES, 08 using Surface Water water sources. It has 82 recorded EPA violations, including 42 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: STANDING ROCK RURAL WATER SYSTEM

STANDING ROCK RURAL WATER SYSTEM is a federal-owned community water system that delivers drinking water to 6,839 residents in FORT YATES, 08 through 1,389 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 82 total violations for this system , of which 42 (51%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 37 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 20 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 60 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. STANDING ROCK RURAL WATER SYSTEM's 82 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.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
6,839
Total Violations
82
Health-Based Violations
42
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Federal
Connections
1,389
School/Daycare
No
MCL Violations
35
Monitoring Violations
37
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 20 2004
TTHM MCL 19 2007
Total Haloacetic Acids (HAA5) MCL 16 2006
Surface Water Treatment Rule TT 6 1995
Surface Water Treatment Rule MR 3 2015
Nitrate MR 3 1995
Long Term 2 Enhanced Surface Water Treatment Rule MR 2 2023
Consumer Confidence Rule Other 1 2024
Chromium MR 1 1986
2,4,5-TP MR 1 1983
Mercury MR 1 1986
CYANIDE MR 1 1999
Long Term 2 Enhanced Surface Water Treatment Rule TT 1 2024
Barium MR 1 1986
Selenium MR 1 1986
Fluoride MR 1 1986
Arsenic MR 1 1986
Cadmium MR 1 1986

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
6:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
8:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 7/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/9/2024 60.0000 µg/L 9 µg/L Detected
PFHpA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/9/2024 <0.004 µg/L 0.004 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 STANDING ROCK 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 084690510 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 Consumer Confidence Rule Other 1 SDWIS / 084690510 / 7000
2024 Long Term 2 Enhanced Surface Water Treatment Rule TT 1 SDWIS / 084690510 / 0800
2023 Long Term 2 Enhanced Surface Water Treatment Rule MR 2 SDWIS / 084690510 / 0800
2015 Surface Water Treatment Rule MR 3 SDWIS / 084690510 / 0200
2007 TTHM MCL 19 SDWIS / 084690510 / 2950
2006 Total Haloacetic Acids (HAA5) MCL 16 SDWIS / 084690510 / 2456
2004 Coliform (TCR) MR 20 SDWIS / 084690510 / 3100
1999 CYANIDE MR 1 SDWIS / 084690510 / 1024
1995 Surface Water Treatment Rule TT 6 SDWIS / 084690510 / 0200
1995 Nitrate MR 3 SDWIS / 084690510 / 1040
1986 Chromium MR 1 SDWIS / 084690510 / 1020
1986 Mercury MR 1 SDWIS / 084690510 / 1035
1986 Barium MR 1 SDWIS / 084690510 / 1010
1986 Selenium MR 1 SDWIS / 084690510 / 1045
1986 Fluoride MR 1 SDWIS / 084690510 / 1025

How STANDING ROCK RURAL WATER SYSTEM Compares

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

Metric STANDING ROCK RURAL WATER SYSTEM 08 avg Federal benchmark
Total violations 82 81.7 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 42 9.7 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 76.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,839 906 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 STANDING ROCK RURAL WATER SYSTEM water safe to drink? ▼
STANDING ROCK RURAL WATER SYSTEM (PWS ID: 084690510) has 82 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 6,839 people using Surface Water sources.
How many people does STANDING ROCK RURAL WATER SYSTEM serve? ▼
STANDING ROCK RURAL WATER SYSTEM serves 6,839 people in FORT YATES, 08. It is a Federal-owned system using Surface Water water sources with 1,389 service connections.
What type of violations does STANDING ROCK RURAL WATER SYSTEM have? ▼
STANDING ROCK RURAL WATER SYSTEM has 82 total violations: 42 health-based violations (MCL exceedances or treatment failures), 37 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in STANDING ROCK RURAL WATER SYSTEM water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in STANDING ROCK RURAL WATER SYSTEM's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does STANDING ROCK RURAL WATER SYSTEM use? ▼
STANDING ROCK RURAL WATER SYSTEM uses Surface Water 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.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial