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SUNNYSIDE CITY OF

Washington — Community Water System — PWSID: WA5385400

System Information

PWSIDWA5385400
System NameSUNNYSIDE CITY OF
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
CitySunnyside
ZIP Code98944
Address818 E Edison
OrganizationSUNNYSIDE CITY OF
Phone—

Population & Service

Population Served17,037
Service Connections5,456

Drinking Water Violations (45)

This water system has 45 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
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Resolved Sep 25, 2025 Consumer Confidence Rule
Feb 1, 2024 Feb 29, 2024 Revised Total Coliform Rule MON No No — — — Resolved Feb 29, 2024 Revised Total Coliform Rule
Jan 1, 2017 Dec 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Dec 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 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
Oct 1, 2014 Dec 31, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2022 Endrin MR No Yes — 0.002 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Simazine MR No Yes — 0.004 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 LASSO MR No Yes — — — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Toxaphene MR No Yes — 0.003 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Atrazine MR No Yes — 0.003 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Chlordane MR No Yes — 0.002 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 BHC-GAMMA MR No Yes — 0.0002 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Methoxychlor MR No Yes — 0.04 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2022 Heptachlor MR No Yes — 0.0004 mg/L — Archived Dec 31, 2022 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Jul 1, 2007 Sep 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Sep 30, 2007 Synthetic Organic Chemicals
Jul 1, 2007 Sep 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Sep 30, 2007 Synthetic Organic Chemicals
Jul 1, 2007 Sep 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Sep 30, 2007 Synthetic Organic Chemicals
Jul 1, 2007 Sep 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Sep 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Jan 1, 2007 Mar 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Mar 31, 2007 Synthetic Organic Chemicals
Jan 1, 2007 Mar 31, 2007 Diquat MR No Yes — 0.02 mg/L — Resolved Mar 31, 2007 Synthetic Organic Chemicals
Jan 1, 1999 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Oct 1, 1997 Oct 31, 1997 Coliform (TCR) MCL Yes No — 5% of samples — Archived Oct 31, 1997 Total Coliform Rule
Oct 1, 1997 Oct 31, 1997 Coliform (TCR) MCL Yes No — 5% of samples — Archived Oct 31, 1997 Total Coliform Rule
Oct 1, 1997 Oct 31, 1997 Coliform (TCR) MCL Yes No — 5% of samples — Archived Oct 31, 1997 Total Coliform Rule
Sep 1, 1995 Sep 30, 1995 Coliform (TCR) MCL Yes No — 5% of samples — Archived Sep 30, 1995 Total Coliform Rule
Oct 1, 1979 Oct 31, 1979 Gross Alpha, Excl. Radon and U MR No No — 15 pCi/L — Archived Oct 31, 1979 Radionuclides and Revised Rad 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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