PlainWater
States → EPA Region 8 — Tribal Water Systems

Community Water System · PWS 084690483

Wolf Creek Water System

Pine Ridge, EPA Region 8 — Tribal Water Systems 57770 - drinking water served from surface water sources to 65 people, tracked in EPA SDWIS and UCMR5.

65
People served
86
EPA violations
23
Health-based
Untested
UCMR5 result

The verdict

EPA records 86 drinking-water violations at Wolf Creek Water System, 27% of them health-based.

86
Total EPA violations on record
27%
Health-based (MCL / treatment failure)
65
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wolf Creek Water System

Wolf Creek Water System is a native american-owned community water system that delivers drinking water to 65 residents in Pine Ridge, EPA Region 8 — Tribal Water Systems through 13 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 86 total violations for this system , of which 23 (27%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 51 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 8 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
65
Total Violations
86
Health-Based Violations
23
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
13
School/Daycare
No
MCL Violations
22
Monitoring Violations
51
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 22 2015
Coliform (TCR) MCL 22 2000
Consumer Confidence Rule Other 8 2010
Lead and Copper Rule MR 5 2023
Total Haloacetic Acids (HAA5) MR 4 2025
TTHM MR 4 2025
Gross Alpha, Excl. Radon and U MR 2 1982
Nitrate MR 2 1994
Revised Total Coliform Rule MON 1 2019
Surface Water Treatment Rule MR 1 2025
Groundwater Rule TT 1 2017
Barium MR 1 1983
Mercury MR 1 1983
Selenium MR 1 1983
Arsenic MR 1 1983
Chromium MR 1 1983
CYANIDE MR 1 2008
Fluoride MR 1 1983
Asbestos MR 1 2020
Combined Radium (-226 and -228) MR 1 1976
Cadmium MR 1 1983

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 Wolf Creek 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 084690483 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 8 — Tribal Water Systems Drinking Water Authority

EPA Region 8 — Tribal Water Systems'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
2025 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 084690483 / 2456
2025 TTHM MR 4 SDWIS / 084690483 / 2950
2025 Surface Water Treatment Rule MR 1 SDWIS / 084690483 / 0200
2023 Lead and Copper Rule MR 5 SDWIS / 084690483 / 5000
2020 Asbestos MR 1 SDWIS / 084690483 / 1094
2019 Revised Total Coliform Rule MON 1 SDWIS / 084690483 / 8000
2017 Groundwater Rule TT 1 SDWIS / 084690483 / 0700
2015 Coliform (TCR) MR 22 SDWIS / 084690483 / 3100
2010 Consumer Confidence Rule Other 8 SDWIS / 084690483 / 7000
2008 CYANIDE MR 1 SDWIS / 084690483 / 1024
2000 Coliform (TCR) MCL 22 SDWIS / 084690483 / 3100
1994 Nitrate MR 2 SDWIS / 084690483 / 1040
1983 Barium MR 1 SDWIS / 084690483 / 1010
1983 Mercury MR 1 SDWIS / 084690483 / 1035
1983 Selenium MR 1 SDWIS / 084690483 / 1045

How Wolf Creek Water System Compares

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

Metric Wolf Creek Water System EPA Region 8 — Tribal Water Systems avg Federal benchmark
Total violations 86 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 23 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 65 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 8 — Tribal Water Systems.

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 Wolf Creek Water System water safe to drink? ▼
Wolf Creek Water System (PWS ID: 084690483) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 65 people using Surface Water sources.
How many people does Wolf Creek Water System serve? ▼
Wolf Creek Water System serves 65 people in Pine Ridge, EPA Region 8 — Tribal Water Systems. It is a Native American-owned system using Surface Water water sources with 13 service connections.
What type of violations does Wolf Creek Water System have? ▼
Wolf Creek Water System has 86 total violations: 23 health-based violations (MCL exceedances or treatment failures), 51 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wolf Creek Water System water? ▼
No PFAS testing data is available for Wolf Creek Water System under the EPA's UCMR5 monitoring program.
What water source does Wolf Creek Water System use? ▼
Wolf Creek 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.
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.