PlainWater
States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 093200360

Walker River Paiute Tribe

Schurz, EPA Region 9 — Tribal Water Systems 89427 - drinking water served from groundwater sources to 662 people, tracked in EPA SDWIS and UCMR5.

662
People served
334
EPA violations
16
Health-based
Untested
UCMR5 result

The verdict

EPA records 334 drinking-water violations at Walker River Paiute Tribe, 5% of them health-based.

334
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
662
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walker River Paiute Tribe

Walker River Paiute Tribe is a native american-owned community water system that delivers drinking water to 662 residents in Schurz, EPA Region 9 — Tribal Water Systems through 440 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 334 total violations for this system , of which 16 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 284 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 28 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 9 — 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
662
Total Violations
334
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
440
School/Daycare
No
MCL Violations
14
Monitoring Violations
284
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 28 2006
Arsenic MCL 11 2025
Nitrate MR 10 2019
Chlorine MR 7 2024
Arsenic MR 6 2024
Total Haloacetic Acids (HAA5) MR 6 2024
TTHM MR 6 2024
Revised Total Coliform Rule MON 5 2024
Endrin MR 4 2011
BHC-GAMMA MR 4 2011
Methoxychlor MR 4 2011
Dalapon MR 4 2011
Diquat MR 4 2011
Endothall MR 4 2011
Di(2-ethylhexyl) adipate MR 4 2011
OXAMYL MR 4 2011
Simazine MR 4 2011
Di(2-ethylhexyl) phthalate MR 4 2011
Picloram MR 4 2011
Dinoseb MR 4 2011
Hexachlorocyclopentadiene MR 4 2011
Carbofuran MR 4 2011
Atrazine MR 4 2011
LASSO MR 4 2011
2,3,7,8-TCDD MR 4 2011
Heptachlor MR 4 2011
Heptachlor epoxide MR 4 2011
2,4-D MR 4 2011
2,4,5-TP MR 4 2011
HEXACHLOROBENZENE MR 4 2011

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 Walker River Paiute Tribe.

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 093200360 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 09 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 Arsenic MCL 11 SDWIS / 093200360 / 1005
2024 Chlorine MR 7 SDWIS / 093200360 / 0999
2024 Arsenic MR 6 SDWIS / 093200360 / 1005
2024 Total Haloacetic Acids (HAA5) MR 6 SDWIS / 093200360 / 2456
2024 TTHM MR 6 SDWIS / 093200360 / 2950
2024 Revised Total Coliform Rule MON 5 SDWIS / 093200360 / 8000
2024 Public Notice Other 4 SDWIS / 093200360 / 7500
2024 Revised Total Coliform Rule RPT 1 SDWIS / 093200360 / 8000
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / 093200360 / 5200
2023 Groundwater Rule TT 2 SDWIS / 093200360 / 0700
2019 Nitrate MR 10 SDWIS / 093200360 / 1040
2011 Endrin MR 4 SDWIS / 093200360 / 2005
2011 BHC-GAMMA MR 4 SDWIS / 093200360 / 2010
2011 Methoxychlor MR 4 SDWIS / 093200360 / 2015
2011 Dalapon MR 4 SDWIS / 093200360 / 2031

How Walker River Paiute Tribe Compares

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

Metric Walker River Paiute Tribe EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 334 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 662 - 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 9 — 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 Walker River Paiute Tribe water safe to drink? ▼
Walker River Paiute Tribe (PWS ID: 093200360) has 334 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 662 people using Groundwater sources.
How many people does Walker River Paiute Tribe serve? ▼
Walker River Paiute Tribe serves 662 people in Schurz, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 440 service connections.
What type of violations does Walker River Paiute Tribe have? ▼
Walker River Paiute Tribe has 334 total violations: 16 health-based violations (MCL exceedances or treatment failures), 284 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walker River Paiute Tribe water? ▼
No PFAS testing data is available for Walker River Paiute Tribe under the EPA's UCMR5 monitoring program.
What water source does Walker River Paiute Tribe use? ▼
Walker River Paiute Tribe 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.
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.