Drinking Water Compliance OS

KING OF PRUSSIA, PA · Chester County

WARWICK WATER WORKS 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)
PA1150157
System type
Community Water System
Population served
98
Service connections
46
Ownership
privately owned
Water source
groundwater (wells)

Violation history

  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    November 1, 2025 – November 30, 2025

    Archived
  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    May 1, 2025 – May 31, 2025

    Resolved
  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    December 1, 2024 – December 31, 2024

    Resolved
  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    September 1, 2024 – September 30, 2024

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 2024 – December 31, 2024

    Resolved
  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    May 1, 2023 – May 31, 2023

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    December 17, 2019 – July 14, 2020

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    December 16, 2019 – July 14, 2020

    Resolved
  • Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)

    Revised Total Coliform Rule

    November 6, 2019 – May 15, 2020

    Resolved
  • Treatment Technique, Level 2 Assessment (RTCR)

    Health-based

    Revised Total Coliform Rule

    November 6, 2019 – July 14, 2020

    Resolved
  • Treatment Technique, Level 1 Assessment (RTCR)

    Health-based

    Revised Total Coliform Rule

    November 5, 2019 – July 14, 2020

    Resolved
  • Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)

    Revised Total Coliform Rule

    November 5, 2019 – May 15, 2020

    Resolved
  • Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR)

    Revised Total Coliform Rule

    October 9, 2019 – May 15, 2020

    Resolved
  • Treatment Technique (SWTR and GWR)

    Health-based

    Groundwater Rule

    September 1, 2019 – September 30, 2019

    Resolved
  • Monitoring of Treatment (SWTR-Unfilt/GWR)

    Groundwater Rule

    May 1, 2015 – May 31, 2015

    Resolved
  • Treatment Technique (SWTR and GWR)

    Health-based

    Groundwater Rule

    January 1, 2015 – January 31, 2015

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 1, 2015 – September 9, 2015

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2012 – July 3, 2013

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    March 11, 2011 – May 23, 2011

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    January 1, 2011 – January 9, 2012

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2010 – December 31, 2010

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2010 – February 18, 2011

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2010 – December 31, 2010

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2009 – December 17, 2009

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2008 – October 10, 2008

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2006 – January 17, 2008

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    January 1, 2005 – February 28, 2005

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    January 1, 2005 – January 13, 2005

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2004 – November 2, 2004

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    July 1, 2001 – October 16, 2002

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    August 1, 2000 – August 31, 2000

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 1998 – September 30, 1998

    Resolved
  • OCCT/SOWT Treatment Installation/Demonstration

    Health-based

    Lead and Copper Rule

    March 21, 1997 – March 9, 2000

    Resolved
  • OCCT/SOWT Study/Recommendation

    Health-based

    Lead and Copper Rule

    January 1, 1995 – January 4, 1997

    Resolved
  • Monitoring, Check/Repeat/Confirmation

    Gross Alpha, Excl. Radon and U

    July 1, 1992 – March 31, 1993

    Archived
  • Monitoring, Regular

    Benzene

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    Vinyl chloride

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    1,1-Dichloroethylene

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    1,2-Dichloroethane

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    1,1,1-Trichloroethane

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    Trichloroethylene

    October 1, 1991 – December 31, 1991

    Archived
  • Monitoring, Regular

    Radium-226

    July 1, 1991 – June 30, 1992

    Archived
  • Maximum Contaminant Level Violation, Average

    Health-based

    Gross Alpha, Excl. Radon and U

    July 1, 1988 – June 30, 1992

    Archived
  • Monitoring, Regular

    Arsenic

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Barium

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Cadmium

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Chromium

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Fluoride

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Mercury

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Nitrate

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Selenium

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Endrin

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Methoxychlor

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    2,4-D

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Toxaphene

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    2,4,5-TP

    June 24, 1988 – June 23, 1991

    Archived
  • Monitoring, Regular

    Fluoride

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Arsenic

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Barium

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Cadmium

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Chromium

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Mercury

    June 30, 1984 – June 29, 1987

    Archived
  • Monitoring, Regular

    Selenium

    June 30, 1984 – June 29, 1987

    Archived

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

Enforcement actions

Contact

WARWICK WATER WORKS

610-630-7911

KING OF PRUSSIA, PA 19406