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RYDERWOOD IMPROVEMENT & SERVICE AS

Washington — Community Water System — PWSID: WA5375100

System Information

PWSIDWA5375100
System NameRYDERWOOD IMPROVEMENT & SERVICE AS
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedDec 11, 2025

Location & Contact

StateWashington
CityKelso
ZIP Code98626
Address1600 13th Ave S
OrganizationRYDERWOOD IMPROVEMENT & SERVICE AS
Phone—

Population & Service

Population Served434
Service Connections290

Drinking Water Violations (85)

This water system has 85 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, 2024 — Consumer Confidence Rule Other No No — — — Resolved Feb 26, 2025 Consumer Confidence Rule
Oct 1, 2022 Oct 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2022 Surface Water Treatment Rule
Oct 1, 2022 Oct 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2022 Surface Water Treatment Rule
Jun 1, 2022 Jun 30, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2022 Surface Water Treatment Rule
Jun 1, 2022 Jun 30, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Jun 30, 2022 Surface Water Treatment Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Dec 22, 2014 Consumer Confidence Rule
Mar 1, 2008 Mar 31, 2008 Surface Water Treatment Rule TT Yes No — — — Archived Mar 31, 2008 Surface Water Treatment Rule
Dec 1, 2007 Dec 31, 2007 Surface Water Treatment Rule TT Yes No — — — Archived Dec 31, 2007 Surface Water Treatment Rule
Jan 1, 2007 Dec 31, 2007 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Carbon tetrachloride MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 CHLOROBENZENE MR No Yes — 0.1 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Benzene MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Tetrachloroethylene MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Ethylbenzene MR No Yes — 0.7 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Styrene MR No Yes — 0.1 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Trichloroethylene MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Toluene MR No Yes — 1 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 Vinyl chloride MR No Yes — 0.002 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2007 Dec 31, 2007 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Archived Dec 31, 2007 Volatile Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Barium MR No Yes — 2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Barium MR No Yes — 2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Chromium MR No Yes — 0.1 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Cadmium MR No Yes — 0.005 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Antimony, Total MR No Yes — 0.006 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Barium MR No Yes — 2 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals
Jan 1, 2002 Dec 31, 2004 Fluoride MR No Yes — 4.0 mg/L — Resolved Dec 31, 2004 Inorganic Chemicals

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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