Drinking Water Compliance OS

West Richland, WA · Benton County

Plymouth Water District Water System

Current status

No open violations on record as of July 4, 2026.

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 Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID)
WA5368045
System type
Community Water System
Population served
288
Service connections
109
Ownership
local government
Water source
groundwater (wells)

Violation history

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2023 – October 3, 2023

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Benzene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Toluene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Styrene

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    October 1, 2022 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    October 1, 2022 – December 31, 2022

    Resolved

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Nitrate

    January 1, 2018 – December 31, 2018

    Resolved

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Nitrate

    January 1, 2018 – December 31, 2018

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2016 – October 31, 2016

    Resolved

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Nitrate

    April 1, 2016 – June 30, 2016

    Resolved

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Nitrate

    January 1, 2016 – December 31, 2016

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2015 – September 5, 2015

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2015 – December 31, 2015

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2015 – December 31, 2015

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2013 – August 23, 2013

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    November 1, 2012 – November 30, 2012

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Benzene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Toluene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Styrene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    April 1, 2009 – June 30, 2009

    Resolved

  • Monitoring, Regular

    —

    Nickel

    April 1, 2008 – June 30, 2008

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2006 – December 31, 2006

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2005 – December 31, 2007

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2005 – December 31, 2006

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2005 – December 31, 2005

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    CYANIDE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Nickel

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2005 – December 31, 2007

    Archived

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfoxide

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfone

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Aldicarb

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2005 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2003 – December 31, 2003

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Toluene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Benzene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    LASSO

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Simazine

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Endrin

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Nickel

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    CYANIDE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Aldicarb

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Aldicarb sulfone

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Aldicarb sulfoxide

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Picloram

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2002 – December 31, 2004

    Archived

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2002 – December 31, 2004

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    November 1, 2000 – November 30, 2000

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 2000 – October 31, 2000

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    November 1, 1998 – November 30, 1998

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 1996 – September 30, 1996

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 1996 – August 31, 1996

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 1996 – July 31, 1996

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    December 1, 1995 – December 31, 1995

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    November 1, 1995 – November 30, 1995

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    November 1, 1995 – November 30, 1995

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    October 1, 1995 – October 31, 1995

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    June 1, 1995 – June 30, 1995

    Archived

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 1993 – September 30, 1993

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 1992 – October 31, 1992

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    August 1, 1992 – August 31, 1992

    Archived

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    July 1, 1992 – July 31, 1992

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 1991 – October 31, 1991

    Archived

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    October 1, 1979 – October 31, 1979

    Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Contact

Plymouth Water District

Phone not on record

West Richland, WA 99353