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TRIBAL COMPLEX

PWS ID: 105300025 · TOPPENISH, 10 98948

TRIBAL COMPLEX serves 907 people in TOPPENISH, 10 using Groundwater water sources. It has 221 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TRIBAL COMPLEX

TRIBAL COMPLEX is a native american-owned community water system that delivers drinking water to 907 residents in TOPPENISH, 10 through 50 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 221 total violations for this system , of which 4 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 196 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 30 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across 10, EPA tracks 158 public water systems serving 142,574 people, with 31,953 cumulative violations and 1,055 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 202.2 violations. TRIBAL COMPLEX's 221 violations sit above the 10 average. Statewide, 2 of 10 UCMR5-tested systems have reported PFAS detections (20%). 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
907
Total Violations
221
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
50
School/Daycare
No
MCL Violations
0
Monitoring Violations
196
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 30 2008
Consumer Confidence Rule Other 11 2019
Chlorine MR 9 2025
Revised Total Coliform Rule RPT 6 2025
Nitrate MR 5 2016
TTHM MR 4 2018
Total Haloacetic Acids (HAA5) MR 4 2018
Groundwater Rule TT 4 2022
Atrazine MR 3 2014
Arsenic MR 3 2014
Antimony, Total MR 3 2014
Lead and Copper Rule MR 3 2021
Benzene MR 3 2014
Gross Alpha, Excl. Radon and U MR 3 2014
Combined Radium (-226 and -228) MR 3 2014
Xylenes, Total MR 2 2014
o-Dichlorobenzene MR 2 2014
Vinyl chloride MR 2 2014
1,1-Dichloroethylene MR 2 2014
trans-1,2-Dichloroethylene MR 2 2014
1,2-Dichloroethane MR 2 2014
1,1,1-Trichloroethane MR 2 2014
Carbon tetrachloride MR 2 2014
1,2-Dichloropropane MR 2 2014
Trichloroethylene MR 2 2014
Tetrachloroethylene MR 2 2014
CHLOROBENZENE MR 2 2014
Styrene MR 2 2014
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2014
Simazine MR 2 2014

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 TRIBAL COMPLEX.

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 105300025 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

10 Drinking Water Authority

10'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 10 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 Chlorine MR 9 SDWIS / 105300025 / 0999
2025 Revised Total Coliform Rule RPT 6 SDWIS / 105300025 / 8000
2022 Groundwater Rule TT 4 SDWIS / 105300025 / 0700
2022 Public Notice Other 2 SDWIS / 105300025 / 7500
2021 Lead and Copper Rule MR 3 SDWIS / 105300025 / 5000
2019 Consumer Confidence Rule Other 11 SDWIS / 105300025 / 7000
2019 Revised Total Coliform Rule MON 1 SDWIS / 105300025 / 8000
2018 TTHM MR 4 SDWIS / 105300025 / 2950
2018 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 105300025 / 2456
2016 Nitrate MR 5 SDWIS / 105300025 / 1040
2014 Atrazine MR 3 SDWIS / 105300025 / 2050
2014 Arsenic MR 3 SDWIS / 105300025 / 1005
2014 Antimony, Total MR 3 SDWIS / 105300025 / 1074
2014 Benzene MR 3 SDWIS / 105300025 / 2990
2014 Gross Alpha, Excl. Radon and U MR 3 SDWIS / 105300025 / 4000

How TRIBAL COMPLEX Compares

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

Metric TRIBAL COMPLEX 10 avg Federal benchmark
Total violations 221 202.2 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 6.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 20% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 907 902 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 158 regulated public water systems in 10.

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 TRIBAL COMPLEX water safe to drink? ▼
TRIBAL COMPLEX (PWS ID: 105300025) has 221 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 907 people using Groundwater sources.
How many people does TRIBAL COMPLEX serve? ▼
TRIBAL COMPLEX serves 907 people in TOPPENISH, 10. It is a Native American-owned system using Groundwater water sources with 50 service connections.
What type of violations does TRIBAL COMPLEX have? ▼
TRIBAL COMPLEX has 221 total violations: 4 health-based violations (MCL exceedances or treatment failures), 196 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TRIBAL COMPLEX water? ▼
No PFAS testing data is available for TRIBAL COMPLEX under the EPA's UCMR5 monitoring program.
What water source does TRIBAL COMPLEX use? ▼
TRIBAL COMPLEX 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. 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