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Port of Royal Slope

Washington — Non-Transient Non-Community — PWSID: WA5300020

System Information

PWSIDWA5300020
System NamePort of Royal Slope
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 26, 2002
Last ReportedDec 11, 2025

Location & Contact

StateWashington
CityRoyal City
ZIP Code99357
AddressPO Box 147
OrganizationPort of Royal Slope
Phone—

Population & Service

Population Served447
Service Connections12

Drinking Water Violations (76)

This water system has 76 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, 2016 Dec 31, 2016 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2016 Nitrate Rule
Jan 1, 2008 Dec 31, 2010 Aldicarb sulfone MR No Yes — — — Archived Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 OXAMYL MR No Yes — 0.2 mg/L — Archived Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Carbofuran MR No Yes — 0.04 mg/L — Archived Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Aldicarb sulfoxide MR No Yes — — — Archived Dec 31, 2010 Synthetic Organic Chemicals
Jan 1, 2008 Dec 31, 2010 Aldicarb MR No Yes — — — Archived Dec 31, 2010 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Atrazine MR No Yes — 0.003 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 2,4,5-TP MR No Yes — 0.05 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfone MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfone MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfone MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Heptachlor MR No Yes — 0.0004 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 LASSO MR No Yes — — — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Dinoseb MR No Yes — 0.007 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Simazine MR No Yes — 0.004 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Picloram MR No Yes — 0.5 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 BHC-GAMMA MR No Yes — 0.0002 mg/L — Archived 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 Pentachlorophenol MR No Yes — 0.001 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Pentachlorophenol MR No Yes — 0.001 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Chlordane MR No Yes — 0.002 mg/L — Archived 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 Dalapon MR No Yes — 0.2 mg/L — Archived 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 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Carbofuran MR No Yes — 0.04 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Endrin MR No Yes — 0.002 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Methoxychlor MR No Yes — 0.04 mg/L — Archived Dec 31, 2007 Synthetic Organic Chemicals
Oct 1, 2007 Dec 31, 2007 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Archived Dec 31, 2007 Synthetic Organic 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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