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WILLISTON CITY OF

North Dakota — Community Water System — PWSID: ND5301012

System Information

PWSIDND5301012
System NameWILLISTON CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1979
Last ReportedJan 5, 2026

Location & Contact

StateNorth Dakota
CityWILLISTON
ZIP Code58802
Address4806 HIGHWAY 85
OrganizationCLARYS, CURTIS
Phone701-557-7104

Population & Service

Population Served26,426
Service Connections6,876

Drinking Water Violations (40)

This water system has 40 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
Nov 1, 2014 Nov 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2014 Total Coliform Rule
Nov 1, 2014 Nov 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2014 Total Coliform Rule
Nov 1, 2014 Nov 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2014 Total Coliform Rule
Nov 1, 2014 Nov 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2014 Total Coliform Rule
Oct 1, 2014 Dec 31, 2014 Chloramine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Chloramine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Chloramine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Chloramine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2014 Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule
Jun 1, 2014 Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule
Jun 1, 2014 Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule
Jun 1, 2014 Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2014 Long Term 2 Enhanced Surface Water Treatment Rule
Feb 1, 2011 Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule
Feb 1, 2011 Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule
Feb 1, 2011 Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule
Feb 1, 2011 Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Feb 28, 2011 Long Term 2 Enhanced Surface Water Treatment Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No 85 0.080 mg/L 80 Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No 85 0.080 mg/L 80 Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No 85 0.080 mg/L 80 Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2006 Mar 31, 2006 TTHM MCL Yes No 85 0.080 mg/L 80 Resolved Mar 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No 84 0.080 mg/L 80 Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No 84 0.080 mg/L 80 Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No 84 0.080 mg/L 80 Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 TTHM MCL Yes No 84 0.080 mg/L 80 Resolved Dec 31, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No 82 0.080 mg/L 80 Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No 82 0.080 mg/L 80 Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No 82 0.080 mg/L 80 Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2005 Sep 30, 2005 TTHM MCL Yes No 82 0.080 mg/L 80 Resolved Sep 30, 2005 Stage 1 Disinfectants and Disinfection Byproducts Rule
Mar 1, 1994 Mar 31, 1994 Surface Water Treatment Rule TT Yes No — — — Archived Mar 31, 1994 Surface Water Treatment Rule
Mar 1, 1994 Mar 31, 1994 Surface Water Treatment Rule TT Yes No — — — Archived Mar 31, 1994 Surface Water Treatment Rule
Mar 1, 1994 Mar 31, 1994 Surface Water Treatment Rule TT Yes No — — — Archived Mar 31, 1994 Surface Water Treatment Rule
Jan 1, 1994 Mar 31, 1994 TTHM MCL Yes No .12 0.080 mg/L .1 Resolved Mar 31, 1994 Former Total Trihalomethane Rule
Jan 1, 1994 Mar 31, 1994 TTHM MCL Yes No .12 0.080 mg/L .1 Resolved Mar 31, 1994 Former Total Trihalomethane Rule
Jan 1, 1994 Mar 31, 1994 TTHM MCL Yes No .12 0.080 mg/L .1 Resolved Mar 31, 1994 Former Total Trihalomethane Rule
Sep 1, 1993 Sep 30, 1993 Surface Water Treatment Rule TT Yes No — — — Archived Sep 30, 1993 Surface Water Treatment Rule
Sep 1, 1993 Sep 30, 1993 Surface Water Treatment Rule TT Yes No — — — Archived Sep 30, 1993 Surface Water Treatment Rule
Sep 1, 1993 Sep 30, 1993 Surface Water Treatment Rule TT Yes No — — — Archived Sep 30, 1993 Surface Water Treatment Rule
Jul 1, 1991 Jul 31, 1991 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1991 Total Coliform Rule
Jul 1, 1991 Jul 31, 1991 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1991 Total Coliform Rule
Jul 1, 1991 Jul 31, 1991 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1991 Total Coliform 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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