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States → EPA Region 10 — Tribal Water Systems

Community Water System · PWS 105300011

Hoh Tribe

Forks, EPA Region 10 — Tribal Water Systems 98331 - drinking water served from groundwater sources to 120 people, tracked in EPA SDWIS and UCMR5.

120
People served
1,117
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,117 drinking-water violations at Hoh Tribe, 1% of them health-based.

1,117
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
120
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Hoh Tribe

Hoh Tribe is a native american-owned community water system that delivers drinking water to 120 residents in Forks, EPA Region 10 — Tribal Water Systems through 62 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 1,117 total violations for this system , of which 7 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 1,078 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 87 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
120
Total Violations
1,117
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
62
School/Daycare
No
MCL Violations
3
Monitoring Violations
1,078
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 87 2015
Chlorine MR 31 2025
Nitrate MR 28 2023
Cadmium MR 23 2014
Barium MR 23 2014
Consumer Confidence Rule Other 23 2025
Chromium MR 20 2014
CYANIDE MR 20 2014
Fluoride MR 20 2014
Mercury MR 20 2014
Selenium MR 20 2014
Beryllium, Total MR 20 2014
Antimony, Total MR 20 2014
Thallium, Total MR 20 2014
Arsenic MR 19 2014
Benzene MR 18 2015
Revised Total Coliform Rule MON 18 2025
Lead and Copper Rule MR 16 2023
Toluene MR 15 2023
Endothall MR 14 2014
Xylenes, Total MR 14 2015
ETHYLENE DIBROMIDE MR 14 2014
Vinyl chloride MR 14 2015
1,2-DIBROMO-3-CHLOROPROPANE MR 14 2014
1,2-Dichloroethane MR 14 2015
CHLOROBENZENE MR 14 2015
cis-1,2-Dichloroethylene MR 14 2015
1,1-Dichloroethylene MR 14 2015
Carbon tetrachloride MR 14 2015
2,3,7,8-TCDD MR 14 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 Hoh Tribe.

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 105300011 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 Chlorine MR 31 SDWIS / 105300011 / 0999
2025 Consumer Confidence Rule Other 23 SDWIS / 105300011 / 7000
2025 Revised Total Coliform Rule MON 18 SDWIS / 105300011 / 8000
2025 Revised Total Coliform Rule RPT 5 SDWIS / 105300011 / 8000
2025 Revised Total Coliform Rule TT 1 SDWIS / 105300011 / 8000
2025 E. COLI MR 1 SDWIS / 105300011 / 3014
2024 Groundwater Rule TT 1 SDWIS / 105300011 / 0700
2024 Public Notice Other 1 SDWIS / 105300011 / 7500
2023 Nitrate MR 28 SDWIS / 105300011 / 1040
2023 Lead and Copper Rule MR 16 SDWIS / 105300011 / 5000
2023 Toluene MR 15 SDWIS / 105300011 / 2991
2022 TTHM MR 7 SDWIS / 105300011 / 2950
2022 Total Haloacetic Acids (HAA5) MR 7 SDWIS / 105300011 / 2456
2017 Gross Alpha, Excl. Radon and U MR 10 SDWIS / 105300011 / 4000
2017 Combined Radium (-226 and -228) MR 5 SDWIS / 105300011 / 4010

How Hoh Tribe Compares

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

Metric Hoh Tribe EPA Region 10 — Tribal Water Systems avg Federal benchmark
Total violations 1,117 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 120 - 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 Hoh Tribe water safe to drink? ▼
Hoh Tribe (PWS ID: 105300011) has 1117 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.
How many people does Hoh Tribe serve? ▼
Hoh Tribe serves 120 people in Forks, EPA Region 10 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 62 service connections.
What type of violations does Hoh Tribe have? ▼
Hoh Tribe has 1,117 total violations: 7 health-based violations (MCL exceedances or treatment failures), 1,078 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Hoh Tribe water? ▼
No PFAS testing data is available for Hoh Tribe under the EPA's UCMR5 monitoring program.
What water source does Hoh Tribe use? ▼
Hoh Tribe 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.