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SENECA

Illinois — Community Water System — PWSID: IL0991050

System Information

PWSIDIL0991050
System NameSENECA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 13, 1981
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CitySENECA
ZIP Code61360
Address340 N. Cash St.
OrganizationPEDDICORD, JENNIFER
Phone815-357-8771

Population & Service

Population Served2,353
Service Connections896

Drinking Water Violations (138)

This water system has 138 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
Sep 1, 2015 Aug 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2015 Aug 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 7, 2007 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Dec 8, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 6.9675 5 pCi/L — Resolved Sep 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Apr 1, 2005 Jun 30, 2005 Combined Radium (-226 and -228) MCL Yes No 7.6425 5 pCi/L — Resolved Jun 30, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Jan 1, 2005 Mar 31, 2005 Combined Radium (-226 and -228) MCL Yes No 7.28975 5 pCi/L — Resolved Mar 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Oct 1, 2004 Dec 31, 2004 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L 5 Resolved Dec 31, 2004 Radionuclides and Revised Rad Rule
Jul 1, 2003 Sep 30, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 30, 2003 Radionuclides and Revised Rad Rule
Jul 1, 2003 Sep 30, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 30, 2003 Radionuclides and Revised Rad Rule
Jul 1, 2003 Sep 30, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Sep 30, 2003 Radionuclides and Revised Rad Rule
Jan 1, 2003 Mar 31, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2003 Radionuclides and Revised Rad Rule
Jan 1, 2003 Mar 31, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2003 Radionuclides and Revised Rad Rule
Jan 1, 2003 Mar 31, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2003 Radionuclides and Revised Rad Rule
Jan 1, 2003 Mar 31, 2003 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2003 Radionuclides and Revised Rad Rule
Sep 7, 2000 Sep 30, 2002 Combined Radium (-226 and -228) MCL Yes No 6.2 5 pCi/L — Resolved Mar 31, 2001 Radionuclides and Revised Rad Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Archived Jul 31, 1994 Total Coliform Rule
Aug 1, 1993 Mar 20, 1995 Combined Radium (-226 and -228) MCL Yes No 9.1 5 pCi/L — Resolved Mar 20, 1995 Radionuclides and Revised Rad Rule
Aug 1, 1993 Mar 20, 1995 Combined Radium (-226 and -228) MCL Yes No 9.1 5 pCi/L — Resolved Mar 20, 1995 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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