SEBASTIAN LAKE UTILITY OPERATING COMPANY

Missouri — Community Water System — PWSID: AR0000511

System Information

PWSID	AR0000511
System Name	SEBASTIAN LAKE UTILITY OPERATING COMPANY
System Type	Community Water System
Water Source	Surface Water Purchased
Activity Status	Active
Owner Type	Local
EPA Region	06
Serves School	No
Wholesaler	No
First Reported	Mar 29, 1979
Last Reported	Nov 13, 2025

Location & Contact

State	Missouri
City	DES PERES
ZIP Code	63131
Address	1630 DES PERES RD, SUITE 140
Organization	STEPHENS, KARL
Phone	—

Population & Service

Population Served	298
Service Connections	82

Drinking Water Violations (35)

This water system has 35 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
Jan 1, 2023	Mar 31, 2023	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Mar 31, 2023	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023	Mar 31, 2023	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Mar 31, 2023	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023	Mar 31, 2023	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Mar 31, 2023	Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022	Dec 31, 2022	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Dec 31, 2022	Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022	Dec 31, 2022	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Dec 31, 2022	Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022	Dec 31, 2022	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Dec 31, 2022	Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022	Dec 31, 2022	TTHM	MCL	Yes	No	81 UG/L	0.080 mg/L	80	Resolved	Dec 31, 2022	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2015	Jun 30, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2015	Total Coliform Rule
Jun 1, 2015	Jun 30, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2015	Total Coliform Rule
Jun 1, 2015	Jun 30, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2015	Total Coliform Rule
Jul 1, 2007	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Apr 17, 2008	Consumer Confidence Rule
May 1, 2006	May 31, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2006	Total Coliform Rule
May 1, 2006	May 31, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2006	Total Coliform Rule
May 1, 2006	May 31, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2006	Total Coliform Rule
Sep 1, 2002	Sep 30, 2002	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2002	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Surface Water Treatment Rule	MR	No	No	—	—	—	Resolved	Jun 30, 2001	Surface Water Treatment Rule
Mar 1, 2001	Mar 31, 2001	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2001	Total Coliform Rule
Jun 1, 2000	Jun 30, 2000		Other	No	No	—	—	—	Archived	Jun 30, 2000	Miscellaneous Other Rules
Jun 1, 2000	Jun 30, 2000		Other	No	No	—	—	—	Archived	Jun 30, 2000	Miscellaneous Other Rules
Jun 1, 2000	Jun 30, 2000		Other	No	No	—	—	—	Archived	Jun 30, 2000	Miscellaneous Other Rules
Apr 1, 2000	Apr 30, 2000	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2000	Total Coliform Rule
Apr 1, 2000	Apr 30, 2000	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2000	Total Coliform Rule
Apr 1, 2000	Apr 30, 2000	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2000	Total Coliform Rule
Apr 1, 2000	Apr 30, 2000	Surface Water Treatment Rule	MR	No	Yes	—	—	—	Resolved	Apr 30, 2000	Surface Water Treatment Rule
Apr 1, 2000	Apr 30, 2000	Surface Water Treatment Rule	MR	No	Yes	—	—	—	Resolved	Apr 30, 2000	Surface Water Treatment Rule
Apr 1, 2000	Apr 30, 2000	Surface Water Treatment Rule	MR	No	Yes	—	—	—	Resolved	Apr 30, 2000	Surface Water Treatment Rule
Sep 1, 1999	Sep 30, 1999	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 1999	Total Coliform Rule
Feb 1, 1998	Feb 28, 1998	Surface Water Treatment Rule	MR	No	No	—	—	—	Archived	Feb 28, 1998	Surface Water Treatment Rule
Feb 1, 1998	Feb 28, 1998	Surface Water Treatment Rule	MR	No	No	—	—	—	Archived	Feb 28, 1998	Surface Water Treatment Rule
Feb 1, 1998	Feb 28, 1998	Surface Water Treatment Rule	Other	No	No	—	—	—	Archived	Feb 28, 1998	Surface Water Treatment Rule
Jul 1, 1995	Jul 31, 1995	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Jul 31, 1995	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1994	Total Coliform Rule
Oct 1, 1994	Oct 31, 1994	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1994	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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