Sells, 09

Pia Oik Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of November 20, 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 09.

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 EPA Region 9’s official records. Always confirm current status with EPA Region 9 before making decisions based on this information.

System facts

System ID (PWSID): 090400021
System type: Community Water System
Population served: 50
Service connections: 12
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2009 – September 30, 2009
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2009 – June 30, 2009
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2009 – March 31, 2009
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2008 – December 31, 2008
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
July 1, 2008 – September 30, 2008
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
April 1, 2008 – June 30, 2008
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2008 – March 31, 2008
Archived
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
October 1, 2007 – December 31, 2007
Archived
Maximum Contaminant Level Violation, Average
Health-based
Arsenic
April 1, 2007 – June 30, 2007
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2004 – December 31, 2004
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2002 – December 31, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Fluoride
January 1, 2000 – December 31, 2000
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
April 1, 2009 – June 30, 2009	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
April 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
January 1, 2008 – March 31, 2008	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
October 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived
April 1, 2007 – June 30, 2007	Maximum Contaminant Level Violation, Average	Arsenic	Health-based	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2002 – December 31, 2002	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Resolved
January 1, 2000 – December 31, 2000	Maximum Contaminant Level Violation, Average	Fluoride	Health-based	Archived

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

Enforcement actions

August 20, 2009Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
June 2, 2009Federal Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
April 9, 2009Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
March 18, 2009Federal Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
January 22, 2009Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
October 30, 2008Federal Public Notification issuedgeneral compliance action — not tied to a specific violation on record
August 20, 2008Federal Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
July 1, 2008Federal Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
June 4, 2008Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
June 4, 2008Federal Public Notification issuedgeneral compliance action — not tied to a specific violation on record
March 25, 2008Federal Variance/Exemption issuedgeneral compliance action — not tied to a specific violation on record
March 25, 2008Federal Compliance achieved1 linked violation
November 13, 2007Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
September 27, 2007Federal Public Notification received from PWSgeneral compliance action — not tied to a specific violation on record
August 20, 2007Federal Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
May 31, 2007Federal Public Notification issuedgeneral compliance action — not tied to a specific violation on record
October 25, 2006Federal Public Notification issuedgeneral compliance action — not tied to a specific violation on record
August 15, 2006Federal Compliance achieved1 linked violation
August 2, 2005Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 2, 2005Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 2, 2005Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 2, 2005Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 2, 2005Federal Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 9, 2005Federal Compliance achieved1 linked violation
May 3, 2005Federal Public Notification issuedgeneral compliance action — not tied to a specific violation on record
February 1, 2005Federal Public Notification requested1 linked violation
March 24, 2000Federal Public Notification received from PWS1 linked violation

Last known contact on file (system is inactive)

Tohono O'odham Utility Authority

5203835830

Sells, AZ 85634