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 August 1, 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)

KNOB HILL WSC formerly served 0 people from surface water.

EPA's federal records list this system as inactive in 2025; the record below is historical.

As of August 1, 2026, its federal record holds 54 entries between 1993 and 2024, all of which EPA lists as closed.

Of the 54, 40 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 Public Notice Rule and Revised PN Rule, inorganic chemicals, and the Total Coliform Rules.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
December 1, 2024 – January 13, 2025
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2024 – November 30, 2024
Archived
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
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2024 – January 13, 2025
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2024 – January 13, 2025
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
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2024 – May 31, 2024
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2024 – May 3, 2024
Resolved
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 9, 2023 – January 13, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 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 and Reporting (DBP)
—
Chlorine
January 1, 2023 – March 31, 2023
Resolved
Monitoring, Regular
—
Nitrate
October 1, 2022 – December 31, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2022 – January 13, 2025
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2022 – April 30, 2022
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
September 29, 2021 – November 29, 2021
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
CHLOROBENZENE
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
—
Toxaphene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Simazine
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Heptachlor
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Chlordane
January 1, 2021 – December 31, 2021
Archived
Monitoring, Regular
—
Nitrite
January 1, 2021 – December 31, 2021
Archived
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2020 – July 30, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 7, 2019 – January 9, 2020
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Mercury
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Chromium
January 1, 2019 – December 31, 2021
Archived
Monitoring, Regular
—
Barium
January 1, 2019 – 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
Lead Consumer Notice
—
Lead and Copper Rule
September 29, 2017 – November 29, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 12, 2016 – June 29, 2017
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2016 – January 17, 2018
Resolved
Monitoring, Regular
—
Barium
January 1, 2008 – March 9, 2010
Resolved
Monitoring, Regular
—
Thallium, Total
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
December 1, 2024 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Archived
November 1, 2024 – November 30, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Archived
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
July 1, 2024 – January 13, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Archived
July 1, 2024 – January 13, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	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
May 1, 2024 – May 31, 2024	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2024 – May 3, 2024	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
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 9, 2023 – January 13, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
June 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
January 1, 2023 – March 31, 2023	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
July 1, 2022 – January 13, 2025	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Archived
April 1, 2022 – April 30, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 29, 2021 – November 29, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2021 – December 31, 2021	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	CHLOROBENZENE	—	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	Toxaphene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Simazine	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Heptachlor	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Chlordane	—	Archived
January 1, 2021 – December 31, 2021	Monitoring, Regular	Nitrite	—	Archived
July 1, 2020 – July 30, 2021	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
November 7, 2019 – January 9, 2020	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2019 – December 31, 2021	Monitoring, Regular	Beryllium, Total	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Mercury	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Chromium	—	Archived
January 1, 2019 – December 31, 2021	Monitoring, Regular	Barium	—	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
September 29, 2017 – November 29, 2021	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
November 12, 2016 – June 29, 2017	Public Notification Violation for NPDWR Violation	Public Notice	—	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	Barium	—	Resolved
January 1, 2008 – March 9, 2010	Monitoring, Regular	Thallium, Total	—	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

March 18, 2025State no longer subject to Rule12 linked violations
December 11, 2024State Public Notification requested4 linked violations
December 4, 2024State Public Notification requested5 linked violations
November 14, 2024State Public Notification requested5 linked violations
September 11, 2024State Public Notification requested6 linked violations
July 22, 2024State Violation/Reminder Notice47 linked violations
May 3, 2024State no longer subject to Rule9 linked violations
March 26, 2024State Public Notification requested28 linked violations
December 5, 2023State Public Notification requested8 linked violations
September 18, 2023State Public Notification requested15 linked violations
June 22, 2023State Public Notification requested7 linked violations
May 23, 2023State Violation/Reminder Notice10 linked violations
April 19, 2023State Violation/Reminder Notice9 linked violations
February 15, 2023State Violation/Reminder Notice27 linked violations
July 27, 2022State Public Notification requested35 linked violations
June 24, 2022State Formal Notice of Violation issued67 linked violations
June 7, 2022State Public Notification requested22 linked violations
March 24, 2022State Public Notification requested9 linked violations
March 24, 2022State Public Notification requested9 linked violations
March 24, 2022State Violation/Reminder Notice39 linked violations
March 24, 2022State Public Notification requested25 linked violations
January 6, 2022State Violation/Reminder Notice11 linked violations
February 8, 2018State Violation/Reminder Notice9 linked violations
February 22, 2016State Public Notification received9 linked violations
November 10, 2014State Violation/Reminder Notice13 linked violations
April 12, 2009State Public Notification received1 linked violation
March 27, 2009State Violation/Reminder Notice1 linked violation

Last known contact on file (system is inactive)

EVANS, MICHAEL, A

817-477-2248

MANSFIELD, TX 76063-1805