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Yocha Dehe Potable Water System

PWS ID: 090605107 · Brooks, 09 95606

Yocha Dehe Potable Water System serves 12,800 people in Brooks, 09 using Groundwater water sources. It has 12 recorded EPA violations, including 2 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: Yocha Dehe Potable Water System

Yocha Dehe Potable Water System is a native american-owned community water system that delivers drinking water to 12,800 residents in Brooks, 09 through 56 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 12 total violations for this system , of which 2 (17%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 6 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 2 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. Yocha Dehe Potable Water System's 12 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
12,800
Total Violations
12
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
56
School/Daycare
No
MCL Violations
2
Monitoring Violations
6
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 2 2007
Gross Alpha, Excl. Radon and U MR 1 2023
Coliform (TCR) MR 1 2005
Total Haloacetic Acids (HAA5) MR 1 2015
TTHM MR 1 2015
Combined Radium (-226 and -228) MR 1 2023
Combined Uranium MR 1 2023

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFHxA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
9Cl-PF3ONS 9/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 9/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFDA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/7/2023 <9 µg/L 9 µg/L Not Detected
PFOA 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 9/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFMBA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 9/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 9/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 9/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFUnA 9/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/7/2023 <0.003 µg/L 0.003 µg/L Not Detected

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 Yocha Dehe Potable Water System.

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 090605107 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
2023 Gross Alpha, Excl. Radon and U MR 1 SDWIS / 090605107 / 4000
2023 Combined Radium (-226 and -228) MR 1 SDWIS / 090605107 / 4010
2023 Combined Uranium MR 1 SDWIS / 090605107 / 4006
2015 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 090605107 / 2456
2015 TTHM MR 1 SDWIS / 090605107 / 2950
2007 Coliform (TCR) MCL 2 SDWIS / 090605107 / 3100
2005 Coliform (TCR) MR 1 SDWIS / 090605107 / 3100

How Yocha Dehe Potable Water System Compares

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

Metric Yocha Dehe Potable Water System 09 avg Federal benchmark
Total violations 12 149.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 2 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 12,800 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 Yocha Dehe Potable Water System water safe to drink? ▼
Yocha Dehe Potable Water System (PWS ID: 090605107) has 12 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 12,800 people using Groundwater sources.
How many people does Yocha Dehe Potable Water System serve? ▼
Yocha Dehe Potable Water System serves 12,800 people in Brooks, 09. It is a Native American-owned system using Groundwater water sources with 56 service connections.
What type of violations does Yocha Dehe Potable Water System have? ▼
Yocha Dehe Potable Water System has 12 total violations: 2 health-based violations (MCL exceedances or treatment failures), 6 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Yocha Dehe Potable Water System water? ▼
No. Yocha Dehe Potable Water System was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Yocha Dehe Potable Water System use? ▼
Yocha Dehe Potable Water System 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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