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MONTERRA

Washington — Community Water System — PWSID: WA5355990

System Information

PWSIDWA5355990
System NameMONTERRA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region10
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1981
Last ReportedDec 11, 2025

Location & Contact

StateWashington
CitySEQUIM
ZIP Code98382
AddressPO BOX 92
OrganizationMONTERRA
Phone—

Population & Service

Population Served464
Service Connections192

Drinking Water Violations (24)

This water system has 24 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, 2018 — Consumer Confidence Rule Other No No — — — Resolved Oct 16, 2018 Consumer Confidence Rule
Jan 1, 2014 Dec 31, 2014 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2014 Nitrate Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Nov 1, 2010 Consumer Confidence Rule
Nov 1, 2005 Nov 30, 2005 Coliform (TCR) MR No No — 5% of samples — Archived Nov 30, 2005 Total Coliform Rule
Dec 1, 2004 Dec 31, 2004 Coliform (TCR) MR No No — 5% of samples — Archived Dec 31, 2004 Total Coliform Rule
Sep 1, 1999 Sep 30, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Sep 30, 1999 Total Coliform Rule
Sep 1, 1999 Sep 30, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Sep 30, 1999 Total Coliform Rule
Sep 1, 1999 Sep 30, 1999 Coliform (TCR) MCL Yes No — 5% of samples — Archived Sep 30, 1999 Total Coliform Rule
Nov 1, 1996 Nov 30, 1996 Coliform (TCR) MCL Yes No — 5% of samples — Archived Nov 30, 1996 Total Coliform Rule
Nov 1, 1996 Nov 30, 1996 Coliform (TCR) MCL Yes No — 5% of samples — Archived Nov 30, 1996 Total Coliform Rule
Nov 1, 1996 Nov 30, 1996 Coliform (TCR) MCL Yes No — 5% of samples — Archived Nov 30, 1996 Total Coliform Rule
Jul 1, 1996 Jul 31, 1996 Coliform (TCR) MR No Yes — 5% of samples — Archived Jul 31, 1996 Total Coliform Rule
Nov 1, 1993 Nov 30, 1993 Coliform (TCR) MR No Yes — 5% of samples — Archived Nov 30, 1993 Total Coliform Rule
Aug 1, 1992 Aug 31, 1992 Coliform (TCR) MR No Yes — 5% of samples — Archived Aug 31, 1992 Total Coliform Rule
Aug 1, 1992 Aug 31, 1992 Coliform (TCR) MR No Yes — 5% of samples — Archived Aug 31, 1992 Total Coliform Rule
Oct 1, 1979 Oct 31, 1979 Barium MR No No — 2 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
Oct 1, 1979 Oct 31, 1979 Mercury MR No No — 0.002 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
Oct 1, 1979 Oct 31, 1979 Nitrate MR No No — 10 mg/L — Archived Oct 31, 1979 Nitrate Rule
Oct 1, 1979 Oct 31, 1979 Cadmium MR No No — 0.005 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
Oct 1, 1979 Oct 31, 1979 Fluoride MR No No — 4.0 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
Oct 1, 1979 Oct 31, 1979 Chromium MR No No — 0.1 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
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
Oct 1, 1979 Oct 31, 1979 Selenium MR No No — 0.05 mg/L — Archived Oct 31, 1979 Inorganic Chemicals
Oct 1, 1979 Oct 31, 1979 Arsenic MR No No — 0.010 mg/L — Archived Oct 31, 1979 Arsenic 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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