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States → EPA Region 10 — Tribal Water Systems

Community Water System · PWS 105300058

Reservation Road

Wellpinit, EPA Region 10 — Tribal Water Systems 99040 - drinking water served from groundwater sources to 110 people, tracked in EPA SDWIS and UCMR5.

110
People served
342
EPA violations
12
Health-based
Untested
UCMR5 result

The verdict

EPA records 342 drinking-water violations at Reservation Road, 4% of them health-based.

342
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
110
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Reservation Road

Reservation Road is a native american-owned community water system that delivers drinking water to 110 residents in Wellpinit, EPA Region 10 — Tribal Water Systems through 22 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 342 total violations for this system , of which 12 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 298 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 73 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 10 — 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
110
Total Violations
342
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
22
School/Daycare
No
MCL Violations
6
Monitoring Violations
298
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 73 2016
Consumer Confidence Rule Other 20 2019
Nitrate MR 12 2016
Gross Alpha, Excl. Radon and U MR 10 2014
Revised Total Coliform Rule MON 9 2022
Groundwater Rule TT 5 2025
Revised Total Coliform Rule RPT 5 2023
Coliform (TCR) MCL 5 2015
cis-1,2-Dichloroethylene MR 4 2011
p-Dichlorobenzene MR 4 2011
o-Dichlorobenzene MR 4 2011
trans-1,2-Dichloroethylene MR 4 2011
Benzene MR 4 2011
Carbon tetrachloride MR 4 2011
CHLOROBENZENE MR 4 2011
Styrene MR 4 2011
Tetrachloroethylene MR 4 2011
Xylenes, Total MR 4 2011
1,1-Dichloroethylene MR 4 2011
1,1,2-Trichloroethane MR 4 2011
1,2-Dichloroethane MR 4 2011
1,2-Dichloropropane MR 4 2011
E. COLI MR 4 2019
Lead and Copper Rule MR 4 2019
DICHLOROMETHANE MR 4 2011
Vinyl chloride MR 4 2011
Trichloroethylene MR 4 2011
Toluene MR 4 2011
Ethylbenzene MR 4 2011
1,2,4-Trichlorobenzene 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 Reservation Road.

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 105300058 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 10 — Tribal Water Systems Drinking Water Authority

EPA Region 10 — 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 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 Groundwater Rule TT 5 SDWIS / 105300058 / 0700
2025 Public Notice Other 2 SDWIS / 105300058 / 7500
2024 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / 105300058 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / 105300058 / 5200
2023 Revised Total Coliform Rule RPT 5 SDWIS / 105300058 / 8000
2022 Revised Total Coliform Rule MON 9 SDWIS / 105300058 / 8000
2021 Revised Total Coliform Rule MCL 1 SDWIS / 105300058 / 8000
2019 Consumer Confidence Rule Other 20 SDWIS / 105300058 / 7000
2019 E. COLI MR 4 SDWIS / 105300058 / 3014
2019 Lead and Copper Rule MR 4 SDWIS / 105300058 / 5000
2016 Coliform (TCR) MR 73 SDWIS / 105300058 / 3100
2016 Nitrate MR 12 SDWIS / 105300058 / 1040
2015 Coliform (TCR) MCL 5 SDWIS / 105300058 / 3100
2014 Gross Alpha, Excl. Radon and U MR 10 SDWIS / 105300058 / 4000
2014 Combined Radium (-226 and -228) MR 2 SDWIS / 105300058 / 4010

How Reservation Road Compares

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

Metric Reservation Road EPA Region 10 — Tribal Water Systems avg Federal benchmark
Total violations 342 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 110 - 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 10 — 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 Reservation Road water safe to drink? ▼
Reservation Road (PWS ID: 105300058) has 342 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 110 people using Groundwater sources.
How many people does Reservation Road serve? ▼
Reservation Road serves 110 people in Wellpinit, EPA Region 10 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 22 service connections.
What type of violations does Reservation Road have? ▼
Reservation Road has 342 total violations: 12 health-based violations (MCL exceedances or treatment failures), 298 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Reservation Road water? ▼
No PFAS testing data is available for Reservation Road under the EPA's UCMR5 monitoring program.
What water source does Reservation Road use? ▼
Reservation Road 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.