Public water system · LA1117021
ActiveMount Hermon Water District
At a glance
Mount Hermon Water District (PWSID LA1117021) is an active community water system in Washington Parish County, Louisiana. It reports serving 1,107 people through 369 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, 5 are health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,107
Service connections
369
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mount Hermon Water District compare with other water systems in Washington Parish County?
By EPA's size categories, Mount Hermon Water District is a small system (501 to 3,300 people). Washington Parish County has 26 active public water systems, and Mount Hermon Water District is the 6th-largest of them by population served. Its population served is about 16% below the county average of 1,318 people per system, and accounts for 3.2% of the 34,265 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 Mount Hermon Water District 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 Mount Hermon Water District?
EPA lists Mount Hermon Water District 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. 9 of the 26 active systems in Washington Parish County (35%) are also owned by a local government.
Does Mount Hermon Water District have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2025. The violations listed here began between May 2012 and October 2025. By type: 5 monitoring and reporting, 4 required treatment not met, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Groundwater Rule (3 of them). EPA lists 6 as unaddressed, 5 as resolved and 1 as archived. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2025-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2025-08-06 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2025-06-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-06-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2025-06-24 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Unaddressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2012-05-01 | 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.
Mount Hermon Water District: frequently asked questions
Who runs Mount Hermon Water District?
Mount Hermon Water District (PWSID LA1117021) is a community water system owned by a local government. It is regulated by the LA state drinking water program.
How many people does Mount Hermon Water District serve?
Mount Hermon Water District reports serving 1,107 people through 369 service connections in Washington Parish County, Louisiana.
Where does Mount Hermon Water District 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 Mount Hermon Water District have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in October 2025. 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 Mount Hermon Water District'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, 5 are health-based, and the most recent began in October 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the LA state drinking water program.
Where can I find Mount Hermon Water District's water quality report?
As a community water system, Mount Hermon Water District 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 Washington Parish County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Bogalusa Water System | Washington Parish | 14,000 | Community | Groundwater |
| Varnado Water Works | Washington Parish | 4,230 | Community | Groundwater |
| Bogue-Lusa Water Works District | Washington Parish | 4,200 | Community | Groundwater |
| Town of Franklinton Water System | Washington Parish | 4,150 | Community | Groundwater |
| Rural Franklinton Water | Washington Parish | 3,450 | Community | Groundwater |
| Varnado Water Works - Pine | Washington Parish | 840 | 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, “Mount Hermon Water District, PWSID LA1117021, Louisiana”, https://aquacensus.com/water-systems/louisiana/mount-hermon-water-district-la1117021 (data as of October 1, 2026).