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ST HELENS, CITY OF

Oregon — Community Water System — PWSID: OR4100724

System Information

PWSIDOR4100724
System NameST HELENS, CITY OF
System TypeCommunity Water System
Water SourceGround Water Under Influence
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityST HELENS
ZIP Code97051
Address984 OREGON ST
OrganizationST HELENS, CITY OF
Phone503-397-3532

Population & Service

Population Served13,410
Service Connections5,500

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
Jul 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Sep 7, 2023 Lead and Copper Rule
Jul 1, 2023 Jul 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2023 Surface Water Treatment Rule
Jul 1, 2023 Jul 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2023 Surface Water Treatment Rule
Jul 1, 2023 Jul 31, 2023 Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2023 Surface Water Treatment Rule
Apr 1, 2023 Jun 30, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2023 Jun 30, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Dec 1, 2010 Dec 31, 2010 Surface Water Treatment Rule MR No Yes — — — Archived Dec 31, 2010 Surface Water Treatment Rule
Dec 1, 2010 Dec 31, 2010 Surface Water Treatment Rule MR No Yes — — — Archived Dec 31, 2010 Surface Water Treatment Rule
May 1, 2010 May 31, 2010 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2010 Surface Water Treatment Rule
May 1, 2010 May 31, 2010 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2010 Surface Water Treatment Rule
May 1, 2010 May 31, 2010 Surface Water Treatment Rule MR No Yes — — — Resolved May 31, 2010 Surface Water Treatment Rule
Jan 1, 2006 Dec 31, 2006 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2006 Nitrate Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Feb 2, 2004 — Surface Water Treatment Rule TT Yes No — — — Resolved Jul 30, 2007 Surface Water Treatment Rule
Jan 1, 2002 Dec 31, 2004 HEXACHLOROBENZENE MR No No — 0.001 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Glyphosate MR No No — 0.7 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Di(2-ethylhexyl) adipate MR No No — 0.4 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 2,4-D MR No No — 0.07 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 2,4,5-TP MR No No — 0.05 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Picloram MR No No — 0.5 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Dalapon MR No No — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Hexachlorocyclopentadiene MR No No — 0.05 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Atrazine MR No No — 0.003 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2002 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2002 Nitrate Rule
Jan 1, 2002 Dec 31, 2004 Heptachlor epoxide MR No No — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Heptachlor MR No No — 0.0004 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Methoxychlor MR No No — 0.04 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Endrin MR No No — 0.002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Toxaphene MR No No — 0.003 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Diquat MR No No — 0.02 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 OXAMYL MR No No — 0.2 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Endothall MR No No — 0.1 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Simazine MR No No — 0.004 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Di(2-ethylhexyl) phthalate MR No No — 0.006 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Dinoseb MR No No — 0.007 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Carbofuran MR No No — 0.04 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 LASSO MR No No — — — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 BHC-GAMMA MR No No — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Benzo(a)pyrene MR No No — 0.0002 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Pentachlorophenol MR No No — 0.001 mg/L — Resolved Dec 31, 2004 Synthetic Organic Chemicals
Jan 1, 2002 Dec 31, 2004 Total Polychlorinated Biphenyls (PCB) MR No No — 0.0005 mg/L — Resolved Dec 31, 2004 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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