SHAMROCK, OK

SHAMROCK Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of March 1, 1999. 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 OK.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): OK2001911
System type: Community Water System
Population served: 218
Service connections: 55
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1997 – May 31, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1997 – March 31, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1997 – February 28, 1997
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1995 – August 31, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1995 – July 31, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1992 – July 31, 1992
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1991 – June 30, 1991
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1991 – May 31, 1991
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1991 – April 30, 1991
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 1998 – August 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1997 – May 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 1997 – March 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 1997 – February 28, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
August 1, 1995 – August 31, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 1995 – July 31, 1995	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1992 – July 31, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
June 1, 1991 – June 30, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1991 – May 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 1991 – April 30, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 15, 1997State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
May 1, 1995Federal issued Formal Notice of Violation1000 linked violations
October 24, 1994State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
August 28, 1991State Boil Water Ordergeneral compliance action — not tied to a specific violation on record
August 27, 1991State Administrative/Compliance Order without penalty issuedgeneral compliance action — not tied to a specific violation on record
May 30, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record

Last known contact on file (system is inactive)

Not on record

Phone not on record

SHAMROCK, OK 740680351