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JEFFERSON WATERWORKS

Wisconsin — Community Water System — PWSID: WI1280104

System Information

PWSIDWI1280104
System NameJEFFERSON WATERWORKS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedJan 28, 1981
Last ReportedDec 17, 2025

Location & Contact

StateWisconsin
CityJEFFERSON
ZIP Code54549-1772
Address317 S MAIN ST
OrganizationCOPSEY, SARAH - JEFFERSON CITY CLERK
Phone—

Population & Service

Population Served7,926
Service Connections3,072

Drinking Water Violations (55)

This water system has 55 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 — Lead and Copper Rule MR No No — TT — Resolved Nov 19, 2024 Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Nov 19, 2024 Lead and Copper Rule
Apr 1, 2024 Jun 30, 2024 Combined Radium (-226 and -228) MCL Yes No 6.83 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2024 Radionuclides and Revised Rad Rule
Apr 1, 2024 Jun 30, 2024 Combined Radium (-226 and -228) MCL Yes No 6.83 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2024 Radionuclides and Revised Rad Rule
Apr 1, 2024 Jun 30, 2024 Combined Radium (-226 and -228) MCL Yes No 6.83 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2024 Radionuclides and Revised Rad Rule
Apr 1, 2024 Jun 30, 2024 Combined Radium (-226 and -228) MCL Yes No 6.83 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2024 Radionuclides and Revised Rad Rule
Apr 1, 2024 Jun 30, 2024 Combined Radium (-226 and -228) MCL Yes No 6.83 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 7.05 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 7.05 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 7.05 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 7.05 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 7.05 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2024 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 7.81 PCI/L 5 pCi/L 5.5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 7.81 PCI/L 5 pCi/L 5.5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 7.81 PCI/L 5 pCi/L 5.5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 7.81 PCI/L 5 pCi/L 5.5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 7.81 PCI/L 5 pCi/L 5.5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 7.73 PCI/L 5 pCi/L 5.5 Archived Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 7.73 PCI/L 5 pCi/L 5.5 Archived Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 7.73 PCI/L 5 pCi/L 5.5 Archived Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 7.73 PCI/L 5 pCi/L 5.5 Archived Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 7.73 PCI/L 5 pCi/L 5.5 Archived Sep 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.79 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.79 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.79 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.79 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.79 PCI/L 5 pCi/L 5.5 Archived Jun 30, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.19 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.19 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.19 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.19 PCI/L 5 pCi/L 5.5 Archived Mar 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Combined Radium (-226 and -228) MCL Yes No 5.7525 MG/L 5 pCi/L 5.5 Archived Dec 31, 2022 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Combined Radium (-226 and -228) MCL Yes No 5.7525 MG/L 5 pCi/L 5.5 Archived Dec 31, 2022 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Combined Radium (-226 and -228) MCL Yes No 5.7525 MG/L 5 pCi/L 5.5 Archived Dec 31, 2022 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Combined Radium (-226 and -228) MCL Yes No 5.7525 MG/L 5 pCi/L 5.5 Archived Dec 31, 2022 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Combined Radium (-226 and -228) MCL Yes No 5.7525 MG/L 5 pCi/L 5.5 Archived Dec 31, 2022 Radionuclides and Revised Rad Rule
May 10, 2010 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jan 1, 2010 Mar 31, 2010 Gross Alpha, Excl. Radon and U MCL Yes No 19.1 PCI/L 15 pCi/L 15.5 Resolved Mar 31, 2010 Radionuclides and Revised Rad Rule
Jan 1, 2010 Mar 31, 2010 Gross Alpha, Excl. Radon and U MCL Yes No 19.1 PCI/L 15 pCi/L 15.5 Resolved Mar 31, 2010 Radionuclides and Revised Rad Rule
Jan 1, 2010 Mar 31, 2010 Gross Alpha, Excl. Radon and U MCL Yes No 19.1 PCI/L 15 pCi/L 15.5 Resolved Mar 31, 2010 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Apr 1, 2009 Jun 30, 2009 Gross Alpha, Excl. Radon and U MCL Yes No 18.4 PCI/L 15 pCi/L 15.5 Resolved Jun 30, 2009 Radionuclides and Revised Rad Rule
Sep 1, 1993 Sep 30, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 23, 1993 Total Coliform Rule
Sep 1, 1993 Sep 30, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 23, 1993 Total Coliform Rule
Sep 1, 1993 Sep 30, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 23, 1993 Total Coliform Rule
Sep 1, 1993 Sep 30, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Sep 23, 1993 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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