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RIO WATERWORKS

Wisconsin — Community Water System — PWSID: WI1110111

System Information

PWSIDWI1110111
System NameRIO 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
CityRIO
ZIP Code53960-0276
Address207 LINCOLN
OrganizationRIO VILLAGE CLERK - AMY STONE
Phone—

Population & Service

Population Served1,095
Service Connections405

Drinking Water Violations (36)

This water system has 36 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 17, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jan 23, 2024 Lead and Copper Rule
Jan 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jan 23, 2024 Lead and Copper Rule
Sep 13, 2018 — Groundwater Rule Other No No — — — Resolved Sep 28, 2018 Ground Water Rule
Sep 13, 2018 — Groundwater Rule Other No No — — — Resolved Sep 28, 2018 Ground Water Rule
Jan 1, 2014 Dec 31, 2014 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2014 Dec 31, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Dec 31, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2010 Nitrate Rule
Jul 1, 2010 Sep 30, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2010 Nitrate Rule
Jul 1, 2010 Sep 30, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2010 Nitrate Rule
Jul 1, 2010 Sep 30, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2010 Nitrate Rule
Jan 1, 2009 Mar 31, 2009 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jan 1, 2009 Mar 31, 2009 Radium-228 MR No Yes — — — Resolved Mar 31, 2009 Radionuclides and Revised Rad Rule
Jul 1, 2008 Sep 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2008 Nitrate Rule
Jul 1, 2008 Sep 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2008 Nitrate Rule
Jul 1, 2008 Sep 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2008 Nitrate Rule
Jul 1, 2008 Sep 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2008 Nitrate Rule
Jul 1, 2008 Sep 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Sep 30, 2008 Nitrate Rule
Jan 1, 2007 Dec 31, 2008 TTHM MR No No — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts 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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