Public water system · LA1095007
ActiveSt John Water District 3
At a glance
St John Water District 3 (PWSID LA1095007) is an active community water system in St. John the Baptist Parish County, Louisiana. It reports serving 31,965 people through 10,655 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
31,965
Service connections
10,655
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St John Water District 3 compare with other water systems in St. John the Baptist Parish County?
By EPA's size categories, St John Water District 3 is a large system (10,001 to 100,000 people). St. John the Baptist Parish County has 12 active public water systems, and St John Water District 3 is the largest of them by population served. Its population served is about 8 times the county average of 3,983 people per system, and accounts for 67% of the 47,793 people reported by systems filed under the county. Across Louisiana, the 1,121 active systems average 4,685 people each. Nationally, the average active community water system reports serving 6,703 people, so St John Water District 3 is about 4.8 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Louisiana has 815 active community water systems, 73% of the state's 1,121 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 966 Louisiana systems (86%) list groundwater as their primary source.
Who owns and regulates St John Water District 3?
EPA lists St John Water District 3 as owned by a local government. The LA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 12 active systems in St. John the Baptist Parish County (33%) are also owned by a local government.
Does St John Water District 3 have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2018. The violations listed here began between August 2015 and January 2018. By type: 1 monitoring and reporting, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminants or rules involved are Lead and Copper Rule, Consumer Confidence Rule and Total coliform bacteria (TCR). EPA lists 3 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2018-01-12 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 3 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
St John Water District 3: frequently asked questions
Who runs St John Water District 3?
St John Water District 3 (PWSID LA1095007) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does St John Water District 3 serve?
St John Water District 3 reports serving 31,965 people through 10,655 service connections in St. John the Baptist Parish County, Louisiana.
Where does St John Water District 3 get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does St John Water District 3 have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2018. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is St John Water District 3's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in January 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the LA state drinking water program.
Where can I find St John Water District 3's water quality report?
As a community water system, St John Water District 3 must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in St. John the Baptist Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| St John Water District 1 | St. John the Baptist Parish | 10,484 | Community | Surface water |
| St John Water District 2 | St. John the Baptist Parish | 3,702 | Community | Surface water |
| Marathon Petroleum Company LLC | St. John the Baptist Parish | 817 | Non-transient non-community | Surface water |
| Pleasure Bend Water Supply | St. John the Baptist Parish | 528 | Community | Groundwater |
| Pinnacle Polymers | St. John the Baptist Parish | 110 | Non-transient non-community | Groundwater |
| Frenier Landing Restaurant | St. John the Baptist Parish | 50 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “St John Water District 3, PWSID LA1095007, Louisiana”, https://aquacensus.com/water-systems/louisiana/st-john-water-district-3-la1095007 (data as of October 1, 2026).