Public water system · MD1090010

Active

N. Dorchester Middle & High Schools

At a glance

N. Dorchester Middle & High Schools (PWSID MD1090010) is an active non-transient non-community water system in Dorchester County, Maryland. It reports serving 1,500 people through 9 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 October 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

1,500

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMD1090010

System typeNon-transient non-community water system

Activity statusActive

Population served1,500

Service connections9

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMD state drinking water program

City served—

StateMaryland

ZIP—

CountyDorchester County

How does N. Dorchester Middle & High Schools compare with other water systems in Dorchester County?

By EPA's size categories, N. Dorchester Middle & High Schools is a small system (501 to 3,300 people). Dorchester County has 70 active public water systems, and N. Dorchester Middle & High Schools is the 3rd-largest of them by population served. Its population served is about 4.3 times the county average of 351 people per system, and accounts for 6.1% 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 non-transient non-community water system reports serving 430 people, so N. Dorchester Middle & High Schools is about 3.5 times that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Maryland has 491 active non-transient non-community water systems, 16% 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 N. Dorchester Middle & High Schools?

EPA lists N. Dorchester Middle & High Schools 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 N. Dorchester Middle & High Schools have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2024. The violations listed here began between April 2008 and October 2024. By type: 7 monitoring and reporting, 2 monitoring, 1 required treatment not met, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 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
2024-10-17	Required treatment not metLSL Inventory · code 2E	Lead and Copper Rule Revisionscode 5200	Yes	Resolved
2024-10-17	ReportingLSL Reporting · code 4G	Lead and Copper Rule Revisionscode 5200	No	Resolved
2020-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2019-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-03-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2015-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2014-01-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2014-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
2014-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2013-12-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2008-04-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	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.

N. Dorchester Middle & High Schools: frequently asked questions

Who runs N. Dorchester Middle & High Schools?

N. Dorchester Middle & High Schools (PWSID MD1090010) is a non-transient non-community water system owned by a local government. It is regulated by the MD state drinking water program.

How many people does N. Dorchester Middle & High Schools serve?

N. Dorchester Middle & High Schools reports serving 1,500 people through 9 service connections in Dorchester County, Maryland.

Where does N. Dorchester Middle & High Schools 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 N. Dorchester Middle & High Schools 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 October 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 N. Dorchester Middle & High Schools' 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 October 2024. For current results, consult EPA ECHO, or the MD state drinking water program.

Where can I find N. Dorchester Middle & High Schools' water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. N. Dorchester Middle & High Schools is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

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
Town of Secretary	Dorchester	535	Community	Groundwater
Town of Vienna	Dorchester	460	Community	Groundwater
Town of East New Market	Dorchester	400	Community	Groundwater
Bonnie Brook	Dorchester	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, “N. Dorchester Middle & High Schools, PWSID MD1090010, Maryland”, https://aquacensus.com/water-systems/maryland/n-dorchester-middle-high-schools-md1090010 (data as of October 1, 2026).