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Community Water System · PWS SD4602224

Wr/Lj - North Stanley County

Murdo, South Dakota 57559 - drinking water served from surface water sources to 2,492 people, tracked in EPA SDWIS and UCMR5.

2,492
People served
2
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 2 drinking-water violations at Wr/Lj - North Stanley County - below the South Dakota per-system average.

2
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
2,492
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wr/Lj - North Stanley County

Wr/Lj - North Stanley County is a private-owned community water system that delivers drinking water to 2,492 residents in Murdo, South Dakota (Stanley County) through 999 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 2 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed.

No specific contaminant violations have been recorded in EPA's detailed violation register for this system. This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Wr/Lj - North Stanley County's 2 violations sit below the South Dakota average.

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
2,492
Total Violations
2
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
999
County
Stanley
School/Daycare
No
MCL Violations
0
Monitoring Violations
0
Treatment Tech Violations
0

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 Wr/Lj - North Stanley County.

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 SD4602224 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

South Dakota Drinking Water Authority

South Dakota'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 SD regulator via EPA SDWIS

How Wr/Lj - North Stanley County Compares

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

Metric Wr/Lj - North Stanley County South Dakota avg Federal benchmark
Total violations 2 86 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 12.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 85.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,492 1,400 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 654 regulated public water systems in South Dakota.

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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Wr/Lj - North Stanley County water safe to drink? ▼
Wr/Lj - North Stanley County (PWS ID: SD4602224) has 2 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,492 people using Surface Water sources.
How many people does Wr/Lj - North Stanley County serve? ▼
Wr/Lj - North Stanley County serves 2,492 people in Murdo, South Dakota. It is a Private-owned system using Surface Water water sources with 999 service connections.
What type of violations does Wr/Lj - North Stanley County have? ▼
Wr/Lj - North Stanley County has 2 total violations: 0 health-based violations (MCL exceedances or treatment failures), 0 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wr/Lj - North Stanley County water? ▼
No PFAS testing data is available for Wr/Lj - North Stanley County under the EPA's UCMR5 monitoring program.
What water source does Wr/Lj - North Stanley County use? ▼
Wr/Lj - North Stanley County 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.