Public water system · LA1103181
ActiveSt Tam Parish -Northridge Estates
At a glance
St Tam Parish -Northridge Estates (PWSID LA1103181) is an active community water system in St. Tammany Parish County, Louisiana. It reports serving 1,653 people through 299 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in July 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,653
Service connections
299
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does St Tam Parish -Northridge Estates compare with other water systems in St. Tammany Parish County?
By EPA's size categories, St Tam Parish -Northridge Estates is a small system (501 to 3,300 people). St. Tammany Parish County has 170 active public water systems. Its population served is about 28% above the county average of 1,296 people per system, and accounts for 0.8% of the 220,311 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 Tam Parish -Northridge Estates is well below 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 Tam Parish -Northridge Estates?
EPA lists St Tam Parish -Northridge Estates 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. 37 of the 170 active systems in St. Tammany Parish County (22%) are also owned by a local government.
Does St Tam Parish -Northridge Estates have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in July 2005. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2005-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
The one violation in EPA's records.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 Tam Parish -Northridge Estates: frequently asked questions
Who runs St Tam Parish -Northridge Estates?
St Tam Parish -Northridge Estates (PWSID LA1103181) 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 Tam Parish -Northridge Estates serve?
St Tam Parish -Northridge Estates reports serving 1,653 people through 299 service connections in St. Tammany Parish County, Louisiana.
Where does St Tam Parish -Northridge Estates 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 Tam Parish -Northridge Estates have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in July 2005. 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 Tam Parish -Northridge Estates' 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 one violation for this system; it is health-based, and the most recent began in July 2005. 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 Tam Parish -Northridge Estates' water quality report?
As a community water system, St Tam Parish -Northridge Estates 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. Tammany Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Slidell Water Supply | St. Tammany Parish | 35,547 | Community | Groundwater |
| St Tam Parish- Bedico -Faubourg-Coquille | St. Tammany Parish | 18,372 | Community | Groundwater |
| St Tam Parish - Briarwood Terrace | St. Tammany Parish | 17,536 | Community | Groundwater |
| City of Covington Water Supply | St. Tammany Parish | 16,185 | Community | Groundwater |
| City of Mandeville Water Supply | St. Tammany Parish | 13,000 | Community | Groundwater |
| Utilities Inc. - North Park Water Supply | St. Tammany Parish | 11,298 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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 Tam Parish -Northridge Estates, PWSID LA1103181, Louisiana”, https://aquacensus.com/water-systems/louisiana/st-tam-parish-northridge-estates-la1103181 (data as of October 1, 2026).