OAKDALE, PA · Allegheny County

WESTERN ALLEGHENY COUNTY MUN A Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

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

System facts

System ID (PWSID): PA5020034
System type: Community Water System
Population served: 19,031
Service connections: 7,521
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
October 18, 2025 – November 13, 2025
Resolved
Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)
—
Revised Total Coliform Rule
September 7, 2025 – November 13, 2025
Resolved
Treatment Technique, Level 1 Assessment (RTCR)
Health-based
Revised Total Coliform Rule
September 7, 2025 – November 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
September 24, 2024 – October 25, 2024
Resolved
Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)
—
Revised Total Coliform Rule
August 20, 2024 – October 25, 2024
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2016 – September 30, 2016
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2015 – September 30, 2015
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2015 – April 30, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2015 – June 1, 2015
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2015 – March 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2015 – March 31, 2015
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
October 11, 2014 – October 16, 2014
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2014 – August 31, 2014
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2014 – March 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2014 – March 31, 2014
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2013 – February 28, 2013
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
February 1, 2013 – February 28, 2013
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2013 – March 25, 2013
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2012 – September 30, 2012
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2012 – September 30, 2012
Resolved
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
March 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2009 – March 31, 2009
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 10, 2008 – January 16, 2009
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2008 – December 31, 2008
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2008 – September 30, 2008
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2007 – September 30, 2007
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2006 – August 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2006 – September 30, 2006
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
December 1, 2003 – December 31, 2003
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
September 1, 1996 – September 30, 1996
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 1993 – January 31, 1993
Resolved
Monitoring, Regular
—
Cadmium
June 27, 1990 – June 26, 1991
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 18, 2025 – November 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
September 7, 2025 – November 13, 2025	Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)	Revised Total Coliform Rule	—	Resolved
September 7, 2025 – November 13, 2025	Treatment Technique, Level 1 Assessment (RTCR)	Revised Total Coliform Rule	Health-based	Resolved
September 24, 2024 – October 25, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 20, 2024 – October 25, 2024	Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2016 – September 30, 2016	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2015 – September 30, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2015 – April 30, 2015	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2015 – June 1, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 11, 2014 – October 16, 2014	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
August 1, 2014 – August 31, 2014	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
March 1, 2014 – March 31, 2014	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2014 – March 31, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 1, 2013 – February 28, 2013	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2013 – February 28, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2013 – March 25, 2013	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
September 1, 2012 – September 30, 2012	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2012 – September 30, 2012	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – September 30, 2012	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
March 1, 2009 – March 31, 2009	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 2009 – March 31, 2009	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
November 10, 2008 – January 16, 2009	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2008 – December 31, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Resolved
September 1, 2007 – September 30, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
August 1, 2006 – August 31, 2006	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
December 1, 2003 – December 31, 2003	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 1996 – September 30, 1996	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1993 – January 31, 1993	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 27, 1990 – June 26, 1991	Monitoring, Regular	Cadmium	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

November 13, 2025State Public Notification requested1 linked violation
November 13, 2025State Formal Notice of Violation issued1 linked violation
November 13, 2025State Public Notification received1 linked violation
November 13, 2025State Violation/Reminder Notice1 linked violation
November 13, 2025State Compliance achieved3 linked violations
November 12, 2025State Public Notification requested1 linked violation
November 12, 2025State Formal Notice of Violation issued1 linked violation
October 25, 2024State Compliance achieved3 linked violations
October 25, 2024State Public Notification received2 linked violations
September 24, 2024State Violation/Reminder Notice3 linked violations
September 24, 2024State Public Notification requested2 linked violations
November 2, 2016State Compliance achieved1 linked violation
February 9, 2016State Compliance achieved2 linked violations
June 1, 2015State Compliance achieved2 linked violations
April 29, 2015State Compliance achieved2 linked violations
April 29, 2015State Violation/Reminder Notice2 linked violations
October 16, 2014State Public Notification requested2 linked violations
October 16, 2014State Formal Notice of Violation issued2 linked violations
October 16, 2014State Compliance achieved2 linked violations
October 16, 2014State Public Notification received2 linked violations
May 12, 2014State Compliance achieved2 linked violations
May 12, 2014State Violation/Reminder Notice2 linked violations
November 13, 2013State Compliance achieved1 linked violation
March 25, 2013State Compliance achieved3 linked violations
March 25, 2013State Violation/Reminder Notice3 linked violations
October 26, 2012State Violation/Reminder Notice3 linked violations
October 26, 2012State Compliance achieved3 linked violations
February 15, 2012Federal Compliance achieved1 linked violation
March 23, 2010Federal Final Administrative Order issued1 linked violation
May 4, 2009State Violation/Reminder Notice1 linked violation
May 4, 2009State Compliance achieved1 linked violation
May 4, 2009State Compliance achieved1 linked violation
May 4, 2009State Violation/Reminder Notice1 linked violation
April 27, 2009State Public Notification requested1 linked violation
April 27, 2009State Public Notification received1 linked violation
April 27, 2009State Compliance achieved1 linked violation
April 27, 2009State Formal Notice of Violation issued1 linked violation
January 27, 2009State Compliance achieved1 linked violation
January 27, 2009State Formal Notice of Violation issued1 linked violation
January 27, 2009State Public Notification requested1 linked violation
January 27, 2009State Public Notification received1 linked violation
January 16, 2009State Compliance achieved2 linked violations
January 16, 2009State Public Notification received2 linked violations
December 16, 2008State Formal Notice of Violation issued1 linked violation
December 12, 2008State Public Notification requested1 linked violation
November 3, 2008State Public Notification requested1 linked violation
November 3, 2008State Formal Notice of Violation issued1 linked violation
November 1, 2007State Public Notification received1 linked violation
November 1, 2007State Public Notification requested1 linked violation
November 1, 2007State Formal Notice of Violation issued1 linked violation
November 1, 2007State Compliance achieved1 linked violation
October 4, 2006State Violation/Reminder Notice2 linked violations
October 4, 2006State Compliance achieved2 linked violations
March 9, 2004State Compliance achieved1 linked violation
February 20, 2004State Consent Decree/Judgement1 linked violation
November 6, 1991State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 23, 1991State Formal Notice of Violation issued1 linked violation
August 23, 1991State Compliance achieved1 linked violation
August 21, 1991State Violation/Reminder Notice1 linked violation
April 25, 1991State Compliance achieved1 linked violation

Contact

WESTERN ALLEGHENY COUNTY MUN A

412-788-4337

OAKDALE, PA 15071