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LAKE THUNDERHEAD

Missouri — Community Water System — PWSID: MO2036165

System Information

PWSIDMO2036165
System NameLAKE THUNDERHEAD
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypePrivate
EPA Region07
Serves SchoolNo
WholesalerNo
First ReportedMar 7, 1980
Last ReportedDec 31, 2025

Location & Contact

StateMissouri
CityUNIONVILLE
ZIP Code63565-0000
Address10223 WILDFLOWER DR
OrganizationWEIR, RODNEY
Phone660-947-3267

Population & Service

Population Served585
Service Connections652

Drinking Water Violations (50)

This water system has 50 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, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 10, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 10, 2024 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Nov 1, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Nov 1, 2023 Consumer Confidence Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Oct 1, 2021 Oct 31, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2021 Revised Total Coliform Rule
Jun 1, 2021 Jun 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2021 Revised Total Coliform Rule
Jun 1, 2021 Jun 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2021 Revised Total Coliform Rule
Jun 1, 2021 Jun 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2021 Revised Total Coliform Rule
Jun 1, 2021 Jun 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2021 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Nov 1, 2020 Nov 30, 2020 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2020 Revised Total Coliform Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Nov 9, 2020 Consumer Confidence Rule
Nov 1, 2019 Nov 30, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Nov 30, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Mar 1, 2019 Mar 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2019 Revised Total Coliform Rule
Mar 1, 2019 Mar 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2019 Revised Total Coliform Rule
Mar 1, 2019 Mar 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2019 Revised Total Coliform Rule
Mar 1, 2019 Mar 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2019 Revised Total Coliform Rule
Jan 1, 2019 Mar 31, 2019 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 — Public Notice Other No No — — — Resolved Dec 15, 2020 Public Notice Rule and Revised PN Rule
Jan 1, 2017 — Public Notice Other No No — — — Resolved Dec 15, 2020 Public Notice Rule and Revised PN Rule
Jul 1, 2016 Sep 30, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 72 UG/L 0.060 mg/L 60 Resolved Sep 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 TTHM MCL Yes No 102 UG/L 0.080 mg/L 80 Resolved Sep 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2016 Sep 30, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 72 UG/L 0.060 mg/L 60 Resolved Sep 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No 117 UG/L 0.080 mg/L 80 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 72 UG/L 0.060 mg/L 60 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No 117 UG/L 0.080 mg/L 80 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 72 UG/L 0.060 mg/L 60 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2016 Jun 30, 2016 TTHM MCL Yes No 117 UG/L 0.080 mg/L 80 Resolved Jun 30, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 81 UG/L 0.060 mg/L 60 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 81 UG/L 0.060 mg/L 60 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MCL Yes No 81 UG/L 0.060 mg/L 60 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MCL Yes No 124 UG/L 0.080 mg/L 80 Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No 125 UG/L 0.080 mg/L 80 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No 125 UG/L 0.080 mg/L 80 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No 125 UG/L 0.080 mg/L 80 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 TTHM MCL Yes No 125 UG/L 0.080 mg/L 80 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 Total Haloacetic Acids (HAA5) MCL Yes No 93 UG/L 0.060 mg/L 60 Resolved Dec 31, 2015 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015 Sep 30, 2015 TTHM MCL Yes No 96 UG/L 0.080 mg/L 80 Resolved Sep 30, 2015 Stage 2 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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