Public water system · LA1105009
ActiveCity of Hammond Water System
At a glance
City of Hammond Water System (PWSID LA1105009) is an active community water system in Tangipahoa Parish County, Louisiana. It reports serving 21,135 people through 7,049 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in September 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,135
Service connections
7,049
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Hammond Water System compare with other water systems in Tangipahoa Parish County?
By EPA's size categories, City of Hammond Water System is a large system (10,001 to 100,000 people). Tangipahoa Parish County has 32 active public water systems, and City of Hammond Water System is the 2nd-largest of them by population served. Its population served is about 5.1 times the county average of 4,147 people per system, and accounts for 16% of the 132,717 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 City of Hammond Water System is about 3.2 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 City of Hammond Water System?
EPA lists City of Hammond Water System 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. 13 of the 32 active systems in Tangipahoa Parish County (41%) are also owned by a local government.
Does City of Hammond Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in September 2016. The violations listed here began between April 1991 and September 2016. By type: 8 contaminant level above the legal limit, 2 disinfectant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 of them). EPA lists 6 as resolved and 6 as archived. 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. 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 |
|---|---|---|---|---|
| 2016-09-01 | Disinfectant level above the legal limitNon-Acute MRDL · code 11 | Chlorine dioxidecode 1008 | Yes | Resolved |
| 2016-09-01 | Disinfectant level above the legal limitAcute Maximum Residual Disinfectant Level · code 13 | Chlorine dioxidecode 1008 | Yes | Resolved |
| 2013-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2009-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
The 12 most recent 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.
City of Hammond Water System: frequently asked questions
Who runs City of Hammond Water System?
City of Hammond Water System (PWSID LA1105009) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does City of Hammond Water System serve?
City of Hammond Water System reports serving 21,135 people through 7,049 service connections in Tangipahoa Parish County, Louisiana.
Where does City of Hammond Water System 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 City of Hammond Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in September 2016. 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 City of Hammond Water System'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. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in September 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the LA state drinking water program.
Where can I find City of Hammond Water System's water quality report?
As a community water system, City of Hammond Water System 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 Tangipahoa Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tangipahoa Parish Water District | Tangipahoa Parish | 75,873 | Community | Groundwater |
| City of Pontchatoula Water System | Tangipahoa Parish | 6,657 | Community | Groundwater |
| Town of Amite Water System | Tangipahoa Parish | 4,300 | Community | Groundwater |
| Utilities Inc. - Hammond Heights | Tangipahoa Parish | 4,281 | Community | Groundwater |
| Tangipahoa (Second Ward) Water District | Tangipahoa Parish | 4,112 | Community | Groundwater |
| Town of Independence Water System | Tangipahoa Parish | 3,052 | 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, “City of Hammond Water System, PWSID LA1105009, Louisiana”, https://aquacensus.com/water-systems/louisiana/city-of-hammond-water-system-la1105009 (data as of October 1, 2026).