ONTARIO, OR · Malheur County

MOBILETTE RANCH Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of November 10, 1998. 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 Malheur County, OR.

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 Oregon’s official records. Always confirm current status with Oregon before making decisions based on this information.

System facts

System ID (PWSID): OR4100589
System type: Community Water System
Population served: 62
Service connections: 21
Ownership: privately owned
Water source: groundwater (wells)

MOBILETTE RANCH is one of 1,168 community water systems in Oregon in the 500 or fewer people size category, formerly serving 62 people from groundwater.

EPA's federal records list this system as inactive in 1998; the record below is historical.

As of August 1, 2026, its federal record holds 20 entries between 1976 and 1998, all of which EPA lists as closed. Nothing has been added since 1998.

Of the 20, 16 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 Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
April 1, 1997 – April 30, 1997
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
March 1, 1997 – March 31, 1997
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
April 1, 1996 – April 30, 1996
Resolved
Monitoring, Regular
—
Nitrate
January 1, 1996 – December 31, 1996
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
September 1, 1995 – September 30, 1995
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1994 – July 31, 1994
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
May 1, 1994 – May 31, 1994
Resolved
Initial Tap Sampling for Pb and Cu
—
Lead and Copper Rule
January 1, 1994 – April 15, 1996
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 1993 – August 31, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1993 – May 31, 1993
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1993 – January 31, 1993
Archived
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 1992 – September 30, 1993
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1992 – May 31, 1992
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
June 1, 1991 – May 31, 1992
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
January 1, 1991 – January 31, 1991
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 1, 1976 – May 31, 1980
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
June 1, 1976 – May 31, 1980
Archived

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
April 1, 1997 – April 30, 1997	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
March 1, 1997 – March 31, 1997	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
April 1, 1996 – April 30, 1996	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Nitrate	—	Resolved
September 1, 1995 – September 30, 1995	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
September 1, 1995 – September 30, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
September 1, 1995 – September 30, 1995	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 1994 – July 31, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1994 – May 31, 1994	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 1994 – April 15, 1996	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	—	Resolved
August 1, 1993 – August 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 1993 – May 31, 1993	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1993 – January 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
October 1, 1992 – September 30, 1993	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
May 1, 1992 – May 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1991 – May 31, 1992	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 1991 – January 31, 1991	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
June 1, 1976 – May 31, 1980	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 1, 1976 – May 31, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived

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

Enforcement actions

November 10, 1998State Compliance achievedgeneral compliance action — not tied to a specific violation on record
January 15, 1998State Administrative/Compliance Order with penalty issued26 linked violations
December 19, 1997State Administrative Penalty assessedgeneral compliance action — not tied to a specific violation on record
November 15, 1997State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
August 15, 1997State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 29, 1997State Administrative/Compliance Order with penalty issued28 linked violations
May 17, 1996State Compliance achieved1 linked violation
April 15, 1996State Compliance achieved1 linked violation
April 1, 1996State Administrative/Compliance Order with penalty issued1 linked violation
November 1, 1995State Public Notification requested1 linked violation
November 4, 1994State Formal Notice of Violation issued1 linked violation
October 21, 1991State Administrative/Compliance Order without penalty issued2 linked violations

Last known contact on file (system is inactive)

Not on record

541-889-8790

ONTARIO, OR 97914