Public water system · MS0170024
ActiveCity of Horn Lake - Holly Hills
At a glance
City of Horn Lake - Holly Hills (PWSID MS0170024) is an active community water system in DeSoto County, Mississippi. It reports serving 729 people through 278 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, none is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
729
Service connections
278
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Horn Lake - Holly Hills compare with other water systems in DeSoto County?
By EPA's size categories, City of Horn Lake - Holly Hills is a small system (501 to 3,300 people). DeSoto County has 22 active public water systems. Its population served is well below the county average of 9,207 people per system, and accounts for 0.4% 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 City of Horn Lake - Holly Hills 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. 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 City of Horn Lake - Holly Hills?
EPA lists City of Horn Lake - Holly Hills as owned by a local government. 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. 7 of the 22 active systems in DeSoto County (32%) are also owned by a local government.
Does City of Horn Lake - Holly Hills have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2024. The violations listed here began between October 2011 and January 2024. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Radium-228 (4 of them). EPA lists 10 as resolved and 2 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 |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2024-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2012-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
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 Horn Lake - Holly Hills: frequently asked questions
Who runs City of Horn Lake - Holly Hills?
City of Horn Lake - Holly Hills (PWSID MS0170024) is a community water system owned by a local government. It is regulated by the MS state drinking water program.
How many people does City of Horn Lake - Holly Hills serve?
City of Horn Lake - Holly Hills reports serving 729 people through 278 service connections in DeSoto County, Mississippi.
Where does City of Horn Lake - Holly Hills 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 Horn Lake - Holly Hills 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 January 2024. 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 Horn Lake - Holly Hills' 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 January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MS state drinking water program.
Where can I find City of Horn Lake - Holly Hills' water quality report?
As a community water system, City of Horn Lake - Holly Hills 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 |
| Horn Lake Water Association | DeSoto | 12,735 | Community | Groundwater |
| Lewisburg Water Association | DeSoto | 9,390 | 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 Horn Lake - Holly Hills, PWSID MS0170024, Mississippi”, https://aquacensus.com/water-systems/mississippi/city-of-horn-lake-holly-hills-ms0170024 (data as of October 1, 2026).