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States → EPA Region 10 — Tribal Water Systems

Community Water System · PWS 101600001

Desmet

Plummer, EPA Region 10 — Tribal Water Systems 83851 - drinking water served from groundwater sources to 355 people, tracked in EPA SDWIS and UCMR5.

355
People served
123
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 123 drinking-water violations at Desmet, 3% of them health-based.

123
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
355
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Desmet

Desmet is a native american-owned community water system that delivers drinking water to 355 residents in Plummer, EPA Region 10 — Tribal Water Systems through 72 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 123 total violations for this system , of which 4 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 107 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 15 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
355
Total Violations
123
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
72
School/Daycare
No
MCL Violations
3
Monitoring Violations
107
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 15 2014
Chlorine MR 7 2017
Consumer Confidence Rule Other 6 2015
Nitrate MR 5 2010
Gross Alpha, Excl. Radon and U MR 3 2017
Coliform (TCR) MCL 3 2000
Combined Radium (-226 and -228) MR 3 2017
Combined Uranium MR 2 2017
TTHM MR 2 2023
Total Haloacetic Acids (HAA5) MR 2 2023
Asbestos MR 2 2008
2,3,7,8-TCDD MR 2 2008
Revised Total Coliform Rule MON 2 2019
LEAD AND COPPER RULE REVISIONS TT 1 2024
BHC-GAMMA MR 1 2005
Endothall MR 1 2005
Simazine MR 1 2005
Di(2-ethylhexyl) phthalate MR 1 2005
Carbofuran MR 1 2005
Hexachlorocyclopentadiene MR 1 2005
Atrazine MR 1 2005
Chromium MR 1 2005
2,4-D MR 1 2005
Benzo(a)pyrene MR 1 2005
Pentachlorophenol MR 1 2005
Total Polychlorinated Biphenyls (PCB) MR 1 2005
Xylenes, Total MR 1 2005
1,2,4-Trichlorobenzene MR 1 2005
cis-1,2-Dichloroethylene MR 1 2005
p-Dichlorobenzene MR 1 2005

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 Desmet.

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 101600001 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
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / 101600001 / 5200
2023 TTHM MR 2 SDWIS / 101600001 / 2950
2023 Total Haloacetic Acids (HAA5) MR 2 SDWIS / 101600001 / 2456
2019 Revised Total Coliform Rule MON 2 SDWIS / 101600001 / 8000
2017 Chlorine MR 7 SDWIS / 101600001 / 0999
2017 Gross Alpha, Excl. Radon and U MR 3 SDWIS / 101600001 / 4000
2017 Combined Radium (-226 and -228) MR 3 SDWIS / 101600001 / 4010
2017 Combined Uranium MR 2 SDWIS / 101600001 / 4006
2015 Consumer Confidence Rule Other 6 SDWIS / 101600001 / 7000
2014 Coliform (TCR) MR 15 SDWIS / 101600001 / 3100
2010 Nitrate MR 5 SDWIS / 101600001 / 1040
2008 Asbestos MR 2 SDWIS / 101600001 / 1094
2008 2,3,7,8-TCDD MR 2 SDWIS / 101600001 / 2063
2007 Lead and Copper Rule MR 1 SDWIS / 101600001 / 5000
2005 BHC-GAMMA MR 1 SDWIS / 101600001 / 2010

How Desmet Compares

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

Metric Desmet EPA Region 10 — Tribal Water Systems avg Federal benchmark
Total violations 123 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 355 - 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 Desmet water safe to drink? ▼
Desmet (PWS ID: 101600001) has 123 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 355 people using Groundwater sources.
How many people does Desmet serve? ▼
Desmet serves 355 people in Plummer, EPA Region 10 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 72 service connections.
What type of violations does Desmet have? ▼
Desmet has 123 total violations: 4 health-based violations (MCL exceedances or treatment failures), 107 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Desmet water? ▼
No PFAS testing data is available for Desmet under the EPA's UCMR5 monitoring program.
What water source does Desmet use? ▼
Desmet 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.