PATTERSON, LA · St. Mary Parish County

PATTERSON WATER SYSTEM 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 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)

Violation history

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, Acute (TCR)
Health-based
Coliform (TCR)
September 15, 2000 – October 14, 2000
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
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
September 15, 2000 – October 14, 2000	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived

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

Enforcement actions

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 Public Notification requested1 linked violation
August 13, 2025State Violation/Reminder Notice1 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 Violation/Reminder Notice4 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

Contact

GROGAN, RODNEY

985-395-5205

PATTERSON, LA 70392