Is CITY OF PATTERSON WATER SYSTEM required to publish a Consumer Confidence Report?

Yes. CITY OF PATTERSON WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CITY OF PATTERSON WATER SYSTEM’s next Consumer Confidence Report due?

CITY OF PATTERSON WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

PATTERSON, LA · St. Mary Parish County

CITY OF PATTERSON WATER SYSTEM Water System

Consumer Confidence Report status

CITY OF PATTERSON WATER SYSTEM must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for CITY OF PATTERSON WATER SYSTEM.

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

System facts

System ID (PWSID): LA1101006
System type: Community Water System
Population served: 8,456
Service connections: 2,591
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

CITY OF PATTERSON WATER SYSTEM is one of 180 community water systems in Louisiana in the 3,301 to 10,000 people size category, serving 8,456 people from surface water.

As of August 1, 2026, its federal record holds 10 entries between 1993 and 2025, all of which EPA lists as closed.

None of the 10 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Stage 2 Disinfectants and Disinfection Byproducts Rule, the Total Coliform Rules, and the Surface Water Treatment Rules.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
TTHM
July 1, 2025 – September 30, 2025
Archived
Public Notification Violation for NPDWR Violation
—
Public Notice
April 29, 2025 – August 20, 2025
Resolved
Maximum Contaminant Level Violation, Average
Health-based
TTHM
April 1, 2025 – June 30, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
January 1, 2025 – March 31, 2025
Archived
Maximum Contaminant Level Violation, Average
Health-based
TTHM
October 1, 2024 – December 31, 2024
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2010 – February 28, 2010
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 2010 – January 31, 2010
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2004 – July 22, 2005
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1994 – April 30, 1994
Archived
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
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
July 1, 2025 – September 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
April 29, 2025 – August 20, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 1, 2025 – June 30, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
January 1, 2025 – March 31, 2025	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
October 1, 2024 – December 31, 2024	Maximum Contaminant Level Violation, Average	TTHM	Health-based	Archived
February 1, 2010 – February 28, 2010	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2010 – January 31, 2010	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2004 – July 22, 2005	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
April 1, 1994 – April 30, 1994	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
July 1, 1993 – July 31, 1993	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	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

March 26, 2026State Public Notification received1 linked violation
February 26, 2026State Public Notification requested1 linked violation
February 26, 2026State Violation/Reminder Notice1 linked violation
January 7, 2026State Administrative/Compliance Order without penalty issued6 linked violations
December 4, 2025State Public Notification received1 linked violation
November 4, 2025State Public Notification requested1 linked violation
November 4, 2025State Violation/Reminder Notice1 linked violation
August 25, 2025State Public Notification received1 linked violation
August 25, 2025State Public Notification received1 linked violation
August 25, 2025State Public Notification received1 linked violation
August 13, 2025State Violation/Reminder Notice1 linked violation
August 13, 2025State Public Notification requested1 linked violation
June 13, 2025State Violation/Reminder Notice1 linked violation
June 13, 2025State Public Notification requested1 linked violation
March 24, 2025State Violation/Reminder Notice1 linked violation
March 24, 2025State Public Notification requested3 linked violations
January 14, 2025State Public Notification received1 linked violation
December 4, 2024State Public Notification requested1 linked violation
March 18, 2010State Compliance achieved3 linked violations
March 18, 2010State Compliance achieved2 linked violations
March 1, 2010State Public Notification requested5 linked violations
February 2, 2010State Public Notification requested3 linked violations
January 16, 2009State Compliance achieved8 linked violations
January 5, 2009State Violation/Reminder Notice9 linked violations
November 2, 1990State Public Notification receivedgeneral compliance action — not tied to a specific violation on record

Common questions

Is CITY OF PATTERSON WATER SYSTEM required to publish a Consumer Confidence Report?: Yes. CITY OF PATTERSON WATER SYSTEM is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is CITY OF PATTERSON WATER SYSTEM’s next Consumer Confidence Report due?: CITY OF PATTERSON WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CITY OF PATTERSON WATER SYSTEM have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for CITY OF PATTERSON WATER SYSTEM.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

GROGAN, RODNEY

985-395-5205

PATTERSON, LA 70392