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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090605006

Yurok - Weitchpec

Klamath, EPA Region 9 — Tribal Water Systems 95548 - drinking water served from surface water sources to 120 people, tracked in EPA SDWIS and UCMR5.

120
People served
622
EPA violations
19
Health-based
Untested
UCMR5 result

The verdict

EPA records 622 drinking-water violations at Yurok - Weitchpec, 3% of them health-based.

622
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
120
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Yurok - Weitchpec

Yurok - Weitchpec is a native american-owned community water system that delivers drinking water to 120 residents in Klamath, EPA Region 9 — Tribal Water Systems through 25 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 622 total violations for this system , of which 19 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 506 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 Surface Water Treatment Rule, recorded in 165 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 9 — 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
622
Health-Based Violations
19
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
25
School/Daycare
No
MCL Violations
2
Monitoring Violations
506
Treatment Tech Violations
17

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 165 2025
Coliform (TCR) MR 64 2004
Surface Water Treatment Rule TT 13 2019
Nitrate MR 8 2013
Arsenic MR 5 2011
Barium MR 5 2011
Cadmium MR 5 2011
Chromium MR 5 2011
Fluoride MR 5 2011
Mercury MR 5 2011
Selenium MR 5 2011
BHC-GAMMA MR 5 2011
Methoxychlor MR 5 2011
Toxaphene MR 5 2011
Carbofuran MR 5 2011
Atrazine MR 5 2011
LASSO MR 5 2011
Heptachlor MR 5 2011
Heptachlor epoxide MR 5 2011
2,4-D MR 5 2011
2,4,5-TP MR 5 2011
Pentachlorophenol MR 5 2011
Total Polychlorinated Biphenyls (PCB) MR 5 2011
1,2-DIBROMO-3-CHLOROPROPANE MR 5 2011
ETHYLENE DIBROMIDE MR 5 2011
Chlordane MR 5 2011
Consumer Confidence Rule Other 5 2024
Antimony, Total MR 4 2011
Beryllium, Total MR 4 2011
Endrin 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 Yurok - Weitchpec.

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 090605006 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 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
2025 Surface Water Treatment Rule MR 165 SDWIS / 090605006 / 0200
2025 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / 090605006 / 0300
2024 Consumer Confidence Rule Other 5 SDWIS / 090605006 / 7000
2023 Chlorine MR 2 SDWIS / 090605006 / 0999
2023 Revised Total Coliform Rule MON 2 SDWIS / 090605006 / 8000
2019 Surface Water Treatment Rule TT 13 SDWIS / 090605006 / 0200
2018 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 1 SDWIS / 090605006 / 0400
2017 Lead and Copper Rule MR 3 SDWIS / 090605006 / 5000
2015 TTHM MR 2 SDWIS / 090605006 / 2950
2015 Total Haloacetic Acids (HAA5) MR 2 SDWIS / 090605006 / 2456
2013 Nitrate MR 8 SDWIS / 090605006 / 1040
2011 Arsenic MR 5 SDWIS / 090605006 / 1005
2011 Barium MR 5 SDWIS / 090605006 / 1010
2011 Cadmium MR 5 SDWIS / 090605006 / 1015
2011 Chromium MR 5 SDWIS / 090605006 / 1020

How Yurok - Weitchpec Compares

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

Metric Yurok - Weitchpec EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 622 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 19 - 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 9 — 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 Yurok - Weitchpec water safe to drink? ▼
Yurok - Weitchpec (PWS ID: 090605006) has 622 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Surface Water sources.
How many people does Yurok - Weitchpec serve? ▼
Yurok - Weitchpec serves 120 people in Klamath, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Surface Water water sources with 25 service connections.
What type of violations does Yurok - Weitchpec have? ▼
Yurok - Weitchpec has 622 total violations: 19 health-based violations (MCL exceedances or treatment failures), 506 monitoring/reporting violations, and 17 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Yurok - Weitchpec water? ▼
No PFAS testing data is available for Yurok - Weitchpec under the EPA's UCMR5 monitoring program.
What water source does Yurok - Weitchpec use? ▼
Yurok - Weitchpec uses Surface Water 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.