Drinking Water Compliance OS

Klamath, 09

Yurok - Terwer Water System Water System

Current status

3 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace EPA Region 9’s official records. Always confirm current status with EPA Region 9 before making decisions based on this information.

System facts

System ID (PWSID)
090605143
System type
Community Water System
Population served
300
Service connections
160
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Initial, Follow-up, or Routine Source Water M/R

    —

    Lead and Copper Rule

    July 1, 2025

    Unaddressed

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2025 – December 31, 2025

    Archived

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2025 – December 31, 2025

    Archived

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    November 1, 2024 – November 30, 2024

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Chlorine

    October 1, 2024 – December 3, 2024

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2024 – December 12, 2024

    Resolved

  • Public Notification Violation for NPDWR Violation

    —

    Public Notice

    May 1, 2024 – August 20, 2025

    Resolved

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    May 1, 2024 – May 31, 2024

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Chlorine

    April 1, 2024 – June 26, 2024

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2024

    Unaddressed

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2023

    Unaddressed

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 2022 – June 30, 2022

    Resolved

  • Initial, Follow-up, or Routine Source Water M/R

    —

    Lead and Copper Rule

    January 1, 2022 – December 14, 2022

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2016 – July 18, 2016

    Resolved

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    April 1, 2016 – April 30, 2016

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    February 1, 2016 – February 29, 2016

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2016 – December 31, 2016

    Resolved

  • Monitoring, Source Water (GWR)

    —

    E. COLI

    January 1, 2016 – May 14, 2016

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    July 1, 2015 – December 31, 2016

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2013 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2009 – December 31, 2009

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    April 1, 2008 – June 30, 2008

    Resolved

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    April 1, 2008 – June 30, 2008

    Resolved

  • Monitoring, Regular

    —

    Combined Uranium

    April 1, 2008 – June 30, 2008

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2004 – December 31, 2004

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    November 1, 2002 – November 30, 2002

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2002 – August 31, 2005

    Resolved

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    February 1, 2002 – February 28, 2002

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 2002 – January 31, 2002

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    August 1, 2001 – August 31, 2001

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2001 – August 31, 2005

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    July 1, 2001 – July 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2001 – December 31, 2001

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2001 – September 29, 2010

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    December 1, 2000 – December 31, 2000

    Resolved

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    November 1, 2000 – November 30, 2000

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    August 1, 2000 – August 31, 2000

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2000 – December 31, 2000

    Resolved

  • Maximum Contaminant Level Violation, Acute (TCR)

    Health-based

    Coliform (TCR)

    October 1, 1999 – October 31, 1999

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 1999 – September 30, 1999

    Resolved

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    April 1, 1999 – April 30, 1999

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    April 1, 1999 – April 30, 1999

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    March 1, 1999 – March 31, 1999

    Resolved

  • Initial Tap Sampling for Pb and Cu

    —

    Lead and Copper Rule

    July 1, 1998 – February 4, 2005

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    CYANIDE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Nitrite

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Asbestos

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    January 1, 1998 – December 31, 1998

    Resolved

  • Initial Tap Sampling for Pb and Cu

    —

    Lead and Copper Rule

    January 1, 1998 – February 4, 2005

    Resolved

Unaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

Contact

Yurok Tribe

7074821350

Klamath, CA 95548