OKLAHOMA CITY, OK · Ottawa County

WINDMILL HILL ESTATES Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of October 5, 2009. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Ottawa County, OK.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Oklahoma’s official records. Always confirm current status with Oklahoma before making decisions based on this information.

System facts

System ID (PWSID): OK2005868
System type: Community Water System
Population served: 30
Service connections: 12
Ownership: privately owned
Water source: groundwater (wells)

WINDMILL HILL ESTATES is one of 1,277 community water systems in Oklahoma in the 500 or fewer people size category, formerly serving 30 people from groundwater.

EPA's federal records list this system as inactive in 2009; the record below is historical.

As of August 1, 2026, its federal record holds 11 entries between 1992 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.

Of the 11, 10 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules, inorganic chemicals, and the Lead and Copper Rule.

Violation history

Monitoring, Regular
—
Nitrate-Nitrite
January 1, 2007 – December 31, 2007
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2005 – February 28, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2004 – November 30, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2004 – August 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2004 – June 30, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1995 – May 31, 1995
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
September 1, 1994 – September 30, 1994
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 1993 – December 31, 1993
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
June 1, 1993 – October 18, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1992 – April 30, 1992
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2007 – December 31, 2007	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
February 1, 2005 – February 28, 2005	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
November 1, 2004 – November 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 2004 – August 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 2004 – June 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 1995 – September 30, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1995 – May 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 1994 – September 30, 1994	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved
December 1, 1993 – December 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1993 – October 18, 2005	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
April 1, 1992 – April 30, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule3 linked violations
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule2 linked violations
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule3 linked violations
October 10, 2018State no longer subject to Rule3 linked violations
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule2 linked violations
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule2 linked violations
October 10, 2018State no longer subject to Rule2 linked violations
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 10, 2018State no longer subject to Rule1 linked violation
October 5, 2009State no longer subject to Rule1 linked violation
June 25, 2009State Public Notification received1 linked violation
May 28, 2009State Public Notification received2 linked violations
May 18, 2009State Administrative/Compliance Order with penalty issued1 linked violation
May 18, 2009State Public Notification requested1 linked violation
November 1, 2005State Compliance achieved10 linked violations
October 18, 2005Federal Compliance achieved4 linked violations
May 25, 2005State Violation/Reminder Notice3 linked violations
April 26, 2005State Violation/Reminder Notice4 linked violations
April 20, 2005State Administrative/Compliance Order with penalty issued3 linked violations
December 16, 2004State Compliance Meeting conducted4 linked violations
December 16, 2004State Compliance Meeting conducted4 linked violations
December 16, 2004State Compliance Meeting conducted4 linked violations
December 16, 2004State Compliance Meeting conducted3 linked violations
October 26, 2004State Administrative/Compliance Order with penalty issued3 linked violations
October 5, 2004State Violation/Reminder Notice2 linked violations
August 27, 2004State Violation/Reminder Notice1 linked violation
August 27, 2004State Public Notification requested1 linked violation
November 6, 2001State Compliance achieved2 linked violations
July 30, 2001State Administrative/Compliance Order with penalty issued2 linked violations
October 19, 1995State Administrative/Compliance Order without penalty issued1 linked violation
September 20, 1995State Administrative/Compliance Order without penalty issued3 linked violations
October 6, 1994State Boil Water Order3 linked violations
March 7, 1994State Compliance achieved1 linked violation

Last known contact on file (system is inactive)

WINDMILL HILL ESTATES

405-210-8173

OKLAHOMA CITY, OK 73101-1515