Public water system · MD0040004
ActiveChesapeake Ranch Estates
At a glance
Chesapeake Ranch Estates (PWSID MD0040004) is an active community water system in Calvert County, Maryland. It reports serving 9,500 people through 3,874 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,500
Service connections
3,874
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Chesapeake Ranch Estates compare with other water systems in Calvert County?
By EPA's size categories, Chesapeake Ranch Estates is a medium system (3,301 to 10,000 people). Calvert County has 203 active public water systems, and Chesapeake Ranch Estates is the largest of them by population served. Its population served is about 25 times the county average of 384 people per system, and accounts for 12% of the 77,996 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 Chesapeake Ranch Estates is about 42% 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. 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 Chesapeake Ranch Estates?
EPA lists Chesapeake Ranch Estates as privately owned. 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. 160 of the 203 active systems in Calvert County (79%) are also privately owned.
Does Chesapeake Ranch Estates have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013. The violations listed here began between July 2003 and July 2013. By type: 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminants or rules involved are Arsenic and Consumer Confidence Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 2 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.
Chesapeake Ranch Estates: frequently asked questions
Who runs Chesapeake Ranch Estates?
Chesapeake Ranch Estates (PWSID MD0040004) is a community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Chesapeake Ranch Estates serve?
Chesapeake Ranch Estates reports serving 9,500 people through 3,874 service connections in Calvert County, Maryland.
Where does Chesapeake Ranch 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 Chesapeake Ranch Estates have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013. 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 Chesapeake Ranch 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 2 violations for this system; 1 is health-based, and the most recent began in July 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the MD state drinking water program.
Where can I find Chesapeake Ranch Estates' water quality report?
As a community water system, Chesapeake Ranch 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 Calvert County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Town of Chesapeake Beach | Calvert | 5,000 | Community | Groundwater |
| Prince Frederick | Calvert | 4,371 | Community | Groundwater |
| Solomons | Calvert | 3,811 | Community | Groundwater |
| Town of North Beach | Calvert | 3,000 | Community | Groundwater |
| Northern Middle & High Schools | Calvert | 2,470 | Non-transient non-community | Groundwater |
| Chesapeake Church | Calvert | 2,050 | Transient non-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, “Chesapeake Ranch Estates, PWSID MD0040004, Maryland”, https://aquacensus.com/water-systems/maryland/chesapeake-ranch-estates-md0040004 (data as of October 1, 2026).