MANSFIELD, TX · Tarrant County

KNOB HILL WSC Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of January 13, 2025. 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 Tarrant County, TX.

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

System facts

System ID (PWSID): TX2200310
System type: Community Water System
Population served: 0
Service connections: 1
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2024 – September 30, 2024
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
August 29, 2024 – January 13, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
August 18, 2024 – January 13, 2025
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2024 – July 31, 2024
Archived
Monitoring, Regular
—
Nitrate
July 1, 2024 – September 30, 2024
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
June 1, 2024 – June 30, 2024
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
May 31, 2024 – January 13, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
March 22, 2024 – January 13, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2024 – February 29, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
January 1, 2024 – January 31, 2024
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2024 – March 31, 2024
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
August 13, 2023 – January 13, 2025
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2023 – May 3, 2024
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 1, 2023 – January 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 1, 2023 – January 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
April 1, 2023 – January 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 26, 2023 – January 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
March 26, 2023 – January 13, 2025
Archived
Monitoring, Regular
—
Nitrate
January 1, 2023 – March 31, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2022 – April 30, 2022
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2022 – May 3, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2021 – November 30, 2021
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2021 – December 31, 2021
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2021 – July 30, 2021
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Toluene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Styrene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Nitrate
January 1, 2021 – December 31, 2021
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Toxaphene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Atrazine
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
LASSO
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Heptachlor
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Chlordane
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Combined Radium (-226 and -228)
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Beryllium, Total
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Chromium
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Cadmium
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Barium
January 1, 2019 – December 31, 2021
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2018 – July 30, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2018 – July 30, 2021
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2017 – January 17, 2018
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2016 – January 17, 2018
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2008 – March 9, 2010
Resolved
Monitoring, Regular
—
Barium
January 1, 2008 – March 9, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 1993 – July 31, 1993
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
September 1, 2024 – September 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
August 29, 2024 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Archived
August 18, 2024 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Archived
July 1, 2024 – July 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
July 1, 2024 – September 30, 2024	Monitoring, Regular	Nitrate	—	Archived
June 1, 2024 – June 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
May 31, 2024 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Archived
March 22, 2024 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 1, 2024 – February 29, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – January 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – March 31, 2024	Monitoring, Regular	Nitrate	—	Archived
August 13, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2023 – May 3, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
June 1, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 1, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
March 26, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
March 26, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Archived
January 1, 2023 – March 31, 2023	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2022 – April 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2022 – May 3, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
November 1, 2021 – November 30, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2021 – July 30, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Toluene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Styrene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Toxaphene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Atrazine	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	LASSO	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Heptachlor	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	HEXACHLOROBENZENE	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Chlordane	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Chromium	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Cadmium	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Barium	—	Archived
July 1, 2018 – July 30, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2018 – July 30, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2017 – January 17, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2016 – January 17, 2018	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2008 – March 9, 2010	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2008 – March 9, 2010	Monitoring, Regular	Barium	—	Resolved
July 1, 1993 – July 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived

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

Enforcement actions

December 11, 2024State Public Notification requested4 linked violations
July 1, 2024State Public Notification requested6 linked violations
April 25, 2024State Public Notification requested10 linked violations
April 24, 2024State Violation/Reminder Notice29 linked violations
March 8, 2024State Public Notification requested29 linked violations
February 5, 2024State Public Notification requested44 linked violations
August 28, 2023State Public Notification requested6 linked violations
June 29, 2023State Violation/Reminder Notice28 linked violations
November 29, 2022State Public Notification requested16 linked violations
June 28, 2022State Violation/Reminder Notice14 linked violations
June 7, 2022State Violation/Reminder Notice10 linked violations
May 2, 2022State Public Notification requested54 linked violations
March 24, 2022State Violation/Reminder Notice39 linked violations
March 24, 2022State Public Notification requested41 linked violations
March 24, 2022State Public Notification requested39 linked violations
February 11, 2022State Public Notification requested17 linked violations
November 29, 2021State Compliance achieved17 linked violations
September 18, 2019State Public Notification requested13 linked violations
January 25, 2019State Violation/Reminder Notice10 linked violations
January 26, 2017State Public Notification requested26 linked violations
November 18, 2015State Violation/Reminder Notice13 linked violations
March 16, 2015State Violation/Reminder Notice13 linked violations
April 12, 2009State Public Notification received1 linked violation
March 27, 2009State Violation/Reminder Notice1 linked violation
March 27, 2009State Public Notification requested10 linked violations

Last known contact on file (system is inactive)

EVANS, MICHAEL, A

817-477-2248

MANSFIELD, TX 76063-1805