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NORTH PLAINS WATER DEPARTMENT

Oregon — Community Water System — PWSID: OR4100576

System Information

PWSIDOR4100576
System NameNORTH PLAINS WATER DEPARTMENT
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedMar 12, 1979
Last ReportedDec 23, 2025

Location & Contact

StateOregon
CityBEAVERTON
ZIP Code97003
Address1850 SW 170TH AVE
OrganizationNORTH PLAINS WATER DEPARTMENT
Phone971-277-8813

Population & Service

Population Served3,663
Service Connections1,749

Drinking Water Violations (36)

This water system has 36 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
Oct 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Oct 2, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 15, 2024 Consumer Confidence Rule
Nov 1, 2019 Nov 30, 2019 Revised Total Coliform Rule MON No No — — — Resolved Nov 30, 2019 Revised Total Coliform Rule
Jun 1, 2014 Jun 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2014 Total Coliform Rule
Jul 1, 2010 Sep 30, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Dec 31, 2007 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Dec 31, 2007 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Oct 31, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2007 Total Coliform Rule
Jul 1, 2007 Sep 30, 2007 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2007 Sep 30, 2007 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2007 Jun 30, 2007 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2007 Jun 30, 2007 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2005 Dec 31, 2007 Arsenic MR No Yes — 0.010 mg/L — Archived Dec 31, 2007 Arsenic Rule
Jan 1, 2005 Dec 31, 2005 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2005 Nitrate Rule
Oct 19, 2001 — Consumer Confidence Rule Other No No — — — Resolved Jun 3, 2002 Consumer Confidence Rule
Jan 1, 2001 Dec 31, 2001 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2001 Nitrate Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Jun 30, 1995 Lead and Copper Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Jun 30, 1995 Lead and Copper Rule
Jul 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Jun 30, 1995 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Dec 21, 1994 Lead and Copper Rule
Jan 1, 1994 — Lead and Copper Rule MR No No — TT — Resolved Dec 21, 1994 Lead and Copper Rule
Nov 1, 1993 Nov 30, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 1993 Total Coliform Rule
May 1, 1993 May 31, 1993 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 1993 Total Coliform Rule
Jun 1, 1976 May 31, 1980 Gross Alpha, Excl. Radon and U MR No No — 15 pCi/L — Archived May 31, 1980 Radionuclides and Revised Rad Rule
Jun 1, 1976 May 31, 1980 Combined Radium (-226 and -228) MR No No — 5 pCi/L — Archived May 31, 1980 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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