Public water system · MD0090001
ActiveBonnie Brook
At a glance
Bonnie Brook (PWSID MD0090001) is an active community water system in Dorchester County, Maryland. It reports serving 390 people through 110 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, 2 are health-based, and the most recent began in November 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
390
Service connections
110
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Bonnie Brook compare with other water systems in Dorchester County?
By EPA's size categories, Bonnie Brook is a very small system (500 people or fewer). Dorchester County has 70 active public water systems. Its population served is about 11% above the county average of 351 people per system, and accounts for 1.6% of the 24,534 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 Bonnie Brook 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 Bonnie Brook?
EPA lists Bonnie Brook 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. 10 of the 70 active systems in Dorchester County (14%) are also owned by a local government.
Does Bonnie Brook have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2012. The violations listed here began between July 1993 and November 2012. By type: 6 public notice, recordkeeping or other, 4 monitoring and reporting and 2 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (6 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2012-11-30 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2012-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2010-11-30 | Required treatment not metPublic Education · code 65 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2009-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2005-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1994-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | 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.
Bonnie Brook: frequently asked questions
Who runs Bonnie Brook?
Bonnie Brook (PWSID MD0090001) is a community water system owned by a local government. It is regulated by the MD state drinking water program.
How many people does Bonnie Brook serve?
Bonnie Brook reports serving 390 people through 110 service connections in Dorchester County, Maryland.
Where does Bonnie Brook 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 Bonnie Brook have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in November 2012. 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 Bonnie Brook'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, 2 are health-based, and the most recent began in November 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the MD state drinking water program.
Where can I find Bonnie Brook's water quality report?
As a community water system, Bonnie Brook 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 Dorchester County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Cambridge Water | Dorchester | 15,000 | Community | Groundwater |
| Town of Hurlock | Dorchester | 2,150 | Community | Groundwater |
| N. Dorchester Middle & High Schools | Dorchester | 1,500 | Non-transient non-community | Groundwater |
| Town of Secretary | Dorchester | 535 | Community | Groundwater |
| Town of Vienna | Dorchester | 460 | Community | Groundwater |
| Town of East New Market | Dorchester | 400 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Bonnie Brook, PWSID MD0090001, Maryland”, https://aquacensus.com/water-systems/maryland/bonnie-brook-md0090001 (data as of October 1, 2026).