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Washoe Tribe Stewart

PWS ID: 093200359 · Gardnerville, 09 89410

Washoe Tribe Stewart serves 150 people in Gardnerville, 09 using Groundwater water sources. It has 148 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: Washoe Tribe Stewart

Washoe Tribe Stewart is a native american-owned community water system that delivers drinking water to 150 residents in Gardnerville, 09 through 53 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 148 total violations for this system , of which 1 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 136 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 13 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 09, EPA tracks 323 public water systems serving 555,721 people, with 48,296 cumulative violations and 3,354 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 149.5 violations. Washoe Tribe Stewart's 148 violations sit below the 09 average. Statewide, 30 of 41 UCMR5-tested systems have reported PFAS detections (73.2%). 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
150
Total Violations
148
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
53
School/Daycare
No
MCL Violations
0
Monitoring Violations
136
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 13 2013
Nitrate MR 8 2024
Consumer Confidence Rule Other 3 2012
Lead and Copper Rule MR 3 1998
Endrin MR 2 2001
BHC-GAMMA MR 2 2001
Methoxychlor MR 2 2001
Dalapon MR 2 2001
Endothall MR 2 2001
Di(2-ethylhexyl) adipate MR 2 2001
Di(2-ethylhexyl) phthalate MR 2 2001
OXAMYL MR 2 2001
Simazine MR 2 2001
Picloram MR 2 2001
Dinoseb MR 2 2001
Hexachlorocyclopentadiene MR 2 2001
Carbofuran MR 2 2001
Atrazine MR 2 2001
2,3,7,8-TCDD MR 2 2001
Heptachlor MR 2 2001
Heptachlor epoxide MR 2 2001
2,4-D MR 2 2001
2,4,5-TP MR 2 2001
HEXACHLOROBENZENE MR 2 2001
Benzo(a)pyrene MR 2 2001
Pentachlorophenol MR 2 2001
1,2,4-Trichlorobenzene MR 2 2011
cis-1,2-Dichloroethylene MR 2 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2001
Total Polychlorinated Biphenyls (PCB) MR 2 2001

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 Washoe Tribe Stewart.

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 093200359 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

09 Drinking Water Authority

09'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
2024 Nitrate MR 8 SDWIS / 093200359 / 1040
2022 Groundwater Rule TT 1 SDWIS / 093200359 / 0700
2019 Public Notice Other 1 SDWIS / 093200359 / 7500
2019 Revised Total Coliform Rule MON 1 SDWIS / 093200359 / 8000
2016 Revised Total Coliform Rule Other 1 SDWIS / 093200359 / 8000
2013 Coliform (TCR) MR 13 SDWIS / 093200359 / 3100
2013 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 1 SDWIS / 093200359 / 0600
2012 Consumer Confidence Rule Other 3 SDWIS / 093200359 / 7000
2011 1,2,4-Trichlorobenzene MR 2 SDWIS / 093200359 / 2378
2011 cis-1,2-Dichloroethylene MR 2 SDWIS / 093200359 / 2380
2011 Xylenes, Total MR 2 SDWIS / 093200359 / 2955
2011 o-Dichlorobenzene MR 2 SDWIS / 093200359 / 2968
2011 p-Dichlorobenzene MR 2 SDWIS / 093200359 / 2969
2011 DICHLOROMETHANE MR 2 SDWIS / 093200359 / 2964
2011 1,1-Dichloroethylene MR 2 SDWIS / 093200359 / 2977

How Washoe Tribe Stewart Compares

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

Metric Washoe Tribe Stewart 09 avg Federal benchmark
Total violations 148 149.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 10.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 73.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 150 1,720 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 323 regulated public water systems in 09.

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 Washoe Tribe Stewart water safe to drink? ▼
Washoe Tribe Stewart (PWS ID: 093200359) has 148 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 150 people using Groundwater sources.
How many people does Washoe Tribe Stewart serve? ▼
Washoe Tribe Stewart serves 150 people in Gardnerville, 09. It is a Native American-owned system using Groundwater water sources with 53 service connections.
What type of violations does Washoe Tribe Stewart have? ▼
Washoe Tribe Stewart has 148 total violations: 1 health-based violations (MCL exceedances or treatment failures), 136 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Washoe Tribe Stewart water? ▼
No PFAS testing data is available for Washoe Tribe Stewart under the EPA's UCMR5 monitoring program.
What water source does Washoe Tribe Stewart use? ▼
Washoe Tribe Stewart 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