Public water system · MS0170010
ActiveHorn Lake Water Association
At a glance
Horn Lake Water Association (PWSID MS0170010) is an active community water system in DeSoto County, Mississippi. It reports serving 12,735 people through 3,028 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
12,735
Service connections
3,028
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Horn Lake Water Association compare with other water systems in DeSoto County?
By EPA's size categories, Horn Lake Water Association is a large system (10,001 to 100,000 people). DeSoto County has 22 active public water systems, and Horn Lake Water Association is the 5th-largest of them by population served. Its population served is about 38% above the county average of 9,207 people per system, and accounts for 6.3% of the 202,543 people reported by systems filed under the county. Across Mississippi, the 1,133 active systems average 2,832 people each. Nationally, the average active community water system reports serving 6,703 people, so Horn Lake Water Association is about 90% above 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. Mississippi has 947 active community water systems, 84% of the state's 1,133 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,053 Mississippi systems (93%) list groundwater as their primary source.
Who owns and regulates Horn Lake Water Association?
EPA lists Horn Lake Water Association as under public/private ownership. The MS 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 22 active systems in DeSoto County (41%) are also under public/private ownership.
Does Horn Lake Water Association have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. The violations listed here began between January 2008 and October 2023. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Combined Uranium (3 of them). EPA lists 9 as archived and 3 as resolved. 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. 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2020-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
| 2008-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 2008-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Archived |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Archived |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | 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.
Horn Lake Water Association: frequently asked questions
Who runs Horn Lake Water Association?
Horn Lake Water Association (PWSID MS0170010) is a community water system under public/private ownership. It is regulated by the MS state drinking water program.
How many people does Horn Lake Water Association serve?
Horn Lake Water Association reports serving 12,735 people through 3,028 service connections in DeSoto County, Mississippi.
Where does Horn Lake Water Association 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 Horn Lake Water Association have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. 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 Horn Lake Water Association'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, none is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the MS state drinking water program.
Where can I find Horn Lake Water Association's water quality report?
As a community water system, Horn Lake Water Association 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 DeSoto County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Southaven | DeSoto | 56,000 | Community | Groundwater |
| City of Olive Branch | DeSoto | 54,025 | Community | Groundwater |
| City of Hernando | DeSoto | 14,457 | Community | Groundwater |
| City of Horn Lake | DeSoto | 13,649 | Community | Groundwater |
| Lewisburg Water Association | DeSoto | 9,390 | Community | Groundwater |
| Walls Water Assn- Lake Forest | DeSoto | 9,298 | 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, “Horn Lake Water Association, PWSID MS0170010, Mississippi”, https://aquacensus.com/water-systems/mississippi/horn-lake-water-association-ms0170010 (data as of October 1, 2026).