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MESA WATER DEPARTMENT

Washington — Community Water System — PWSID: WA5354100

System Information

PWSIDWA5354100
System NameMESA WATER DEPARTMENT
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedDec 11, 2025

Location & Contact

StateWashington
CityMesa
ZIP Code99343-9670
AddressPO Box 146
OrganizationMESA WATER DEPARTMENT
Phone—

Population & Service

Population Served495
Service Connections163

Drinking Water Violations (68)

This water system has 68 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jan 1, 2023 Dec 31, 2023 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2023 Nitrate Rule
Jan 1, 2019 Dec 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Dec 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Dec 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2016 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2016 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 LASSO MR No Yes — — — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Simazine MR No Yes — 0.004 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2019 Asbestos MR No Yes — 7 MFL — Archived Dec 31, 2019 Inorganic Chemicals
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2008 Dec 31, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2008 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Jan 1, 2007 Dec 31, 2007 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2007 Nitrate Rule
Dec 1, 2004 Dec 31, 2004 Coliform (TCR) MCL Yes No — 5% of samples — Archived Dec 31, 2004 Total Coliform Rule
Jul 1, 1999 Jul 31, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jul 31, 1999 Total Coliform Rule
Jul 1, 1999 Jul 31, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jul 31, 1999 Total Coliform Rule
Jul 1, 1999 Jul 31, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jul 31, 1999 Total Coliform Rule
Nov 1, 1997 Nov 30, 1997 Coliform (TCR) MR No Yes — 5% of samples — Archived Nov 30, 1997 Total Coliform Rule
Feb 1, 1993 Feb 28, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Feb 28, 1993 Total Coliform Rule
Apr 1, 1992 Apr 30, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Archived Apr 30, 1992 Total Coliform Rule
Apr 1, 1992 Apr 30, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Archived Apr 30, 1992 Total Coliform Rule
Apr 1, 1992 Apr 30, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Archived Apr 30, 1992 Total Coliform Rule
Mar 1, 1992 Mar 31, 1992 Coliform (TCR) MCL Yes No — 5% of samples — Archived Mar 31, 1992 Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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