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CORTLAND

Illinois — Community Water System — PWSID: IL0370051

System Information

PWSIDIL0370051
System NameCORTLAND
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJan 4, 1982
Last ReportedDec 4, 2025

Location & Contact

StateIllinois
CityCORTLAND
ZIP Code60112-0519
Address59 SOUTH SOMONAUK RD.
OrganizationSUMMERHILL, JOEL S.
Phone815-756-9684

Population & Service

Population Served4,270
Service Connections1,529

Drinking Water Violations (189)

This water system has 189 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 — Consumer Confidence Rule Other No No — — — Resolved May 22, 2024 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved May 22, 2024 Consumer Confidence Rule
Apr 1, 2017 Jun 30, 2017 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Oct 1, 2008 Dec 31, 2008 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2008 Radionuclides and Revised Rad Rule
Oct 1, 2008 Dec 31, 2008 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2008 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Jan 1, 2007 Mar 31, 2007 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2007 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2006 Dec 31, 2006 Combined Radium (-226 and -228) MCL Yes No 9 PCI/L 5 pCi/L 5 Resolved Dec 31, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Jul 1, 2006 Sep 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L 5 Resolved Sep 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Apr 1, 2006 Jun 30, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Jun 30, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Combined Radium (-226 and -228) MCL Yes No 11 PCI/L 5 pCi/L — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Oct 1, 2005 Dec 31, 2005 Combined Radium (-226 and -228) MCL Yes No 11.225 5 pCi/L — Resolved Dec 31, 2005 Radionuclides and Revised Rad Rule
Jul 1, 2005 Sep 30, 2005 Combined Radium (-226 and -228) MCL Yes No 11.875 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 11.875 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 11.875 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 11.875 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 11.875 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 11.875 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 11.1 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 11.1 5 pCi/L — Resolved Jun 30, 2005 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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