Is CITY OF MANDEVILLE WATER SUPPLY required to publish a Consumer Confidence Report?

Yes. CITY OF MANDEVILLE WATER SUPPLY 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 MANDEVILLE WATER SUPPLY’s next Consumer Confidence Report due?

CITY OF MANDEVILLE WATER SUPPLY’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.

MANDEVILLE, LA · St. Tammany Parish County

CITY OF MANDEVILLE WATER SUPPLY Water System

Consumer Confidence Report status

CITY OF MANDEVILLE WATER SUPPLY 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 MANDEVILLE WATER SUPPLY.

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): LA1103023
System type: Community Water System
Population served: 13,000
Service connections: 4,800
Ownership: local government
Water source: groundwater (wells)

CITY OF MANDEVILLE WATER SUPPLY is one of 85 community water systems in Louisiana in the 10,001 to 100,000 people size category, serving 13,000 people from groundwater.

As of August 1, 2026, its federal record holds 4 entries between 1992 and 2015, all of which EPA lists as closed. Nothing has been added since 2015.

Of the 4, 1 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 Total Coliform Rules and the Stage 1 Disinfectants and Disinfection Byproducts Rule.

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
April 1, 2015 – April 30, 2015
Archived
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2009 – March 31, 2009
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2007 – March 31, 2007
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 1992 – March 31, 1992
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
April 1, 2015 – April 30, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 2009 – March 31, 2009	Monitoring and Reporting (DBP)	TTHM	—	Resolved
March 1, 2007 – March 31, 2007	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 1992 – March 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	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

February 9, 2017State Compliance achieved2 linked violations
May 11, 2015State Public Notification received2 linked violations
April 6, 2015State Public Notification requested1 linked violation
May 13, 2010State Violation/Reminder Notice2 linked violations
July 13, 2009State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
March 19, 2007State Public Notification requested2 linked violations
March 19, 2007State Violation/Reminder Notice3 linked violations
June 30, 2004State Public Notification received2 linked violations

Common questions

Is CITY OF MANDEVILLE WATER SUPPLY required to publish a Consumer Confidence Report?: Yes. CITY OF MANDEVILLE WATER SUPPLY 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 MANDEVILLE WATER SUPPLY’s next Consumer Confidence Report due?: CITY OF MANDEVILLE WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CITY OF MANDEVILLE WATER SUPPLY have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for CITY OF MANDEVILLE WATER SUPPLY.
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

MADDEN, CLAY

985-626-1082

MANDEVILLE, LA 70448