Public water system · MD0100040
ActiveSam Hill Estates
At a glance
Sam Hill Estates (PWSID MD0100040) is an active community water system in Frederick County, Maryland. It reports serving 1,036 people through 384 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 not health-based, and the most recent began in April 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,036
Service connections
384
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sam Hill Estates compare with other water systems in Frederick County?
By EPA's size categories, Sam Hill Estates is a small system (501 to 3,300 people). Frederick County has 211 active public water systems. Its population served is roughly in line with the county average of 1,007 people per system, and accounts for 0.5% of the 212,367 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active community water system reports serving 6,703 people, so Sam Hill 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. Maryland has 422 active community water systems, 14% of the state's 2,992 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,870 Maryland systems (96%) list groundwater as their primary source.
Who owns and regulates Sam Hill Estates?
EPA lists Sam Hill Estates as owned by a local government. The MD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 41 of the 211 active systems in Frederick County (19%) are also owned by a local government.
Does Sam Hill Estates have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2008. By type: 1 monitoring and reporting. The contaminant or rule involved is Stage 2 Disinfectants and Disinfection Byproducts Rule. EPA lists 1 as resolved. 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 |
|---|---|---|---|---|
| 2008-04-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Stage 2 Disinfectants and Disinfection Byproducts Rulecode 0600 | No | Resolved |
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.
Sam Hill Estates: frequently asked questions
Who runs Sam Hill Estates?
Sam Hill Estates (PWSID MD0100040) is a community water system owned by a local government. It is regulated by the MD state drinking water program.
How many people does Sam Hill Estates serve?
Sam Hill Estates reports serving 1,036 people through 384 service connections in Frederick County, Maryland.
Where does Sam Hill 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 Sam Hill Estates have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2008. 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 Sam Hill 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 not health-based, and the most recent began in April 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the MD state drinking water program.
Where can I find Sam Hill Estates' water quality report?
As a community water system, Sam Hill 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 Frederick County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| New Design - Frederick County | Frederick | 74,911 | Community | Surface water |
| City of Frederick | Frederick | 54,000 | Community | Surface water |
| Town of Walkersville | Frederick | 8,440 | Community | Groundwater under influence of surface water |
| Fort Detrick | Frederick | 7,900 | Community | Surface water |
| City of Brunswick | Frederick | 7,312 | Community | Surface water |
| Town of Thurmont | Frederick | 6,200 | Community | Groundwater under influence of surface water |
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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, “Sam Hill Estates, PWSID MD0100040, Maryland”, https://aquacensus.com/water-systems/maryland/sam-hill-estates-md0100040 (data as of October 1, 2026).