Public water system · MD1030017

Active

Hereford High School

At a glance

Hereford High School (PWSID MD1030017) is an active non-transient non-community water system in Baltimore County, Maryland. It reports serving 1,300 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2010.

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

Population served

1,300

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMD1030017

System typeNon-transient non-community water system

Activity statusActive

Population served1,300

Service connections4

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMD state drinking water program

City served—

StateMaryland

ZIP—

CountyBaltimore County

How does Hereford High School compare with other water systems in Baltimore County?

By EPA's size categories, Hereford High School is a small system (501 to 3,300 people). Baltimore County has 272 active public water systems, and Hereford High School is the 4th-largest of them by population served. Its population served is about 7.7 times the county average of 168 people per system, and accounts for 2.8% of the 45,805 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 Hereford High School is about 3 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 Hereford High School?

EPA lists Hereford High School 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 272 active systems in Baltimore County (15%) are also owned by a local government.

Does Hereford High School have drinking water violations?

EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2010. The violations listed here began between April 1993 and October 2010. By type: 4 monitoring and reporting, 2 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 7 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
2010-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1999-07-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1998-07-01	Required treatment not metOCCT/SOWT Study/Recommendation · code 57	Lead and Copper Rulecode 5000	Yes	Resolved
1998-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1997-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1994-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1993-04-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved

All 7 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.

Hereford High School: frequently asked questions

Who runs Hereford High School?

Hereford High School (PWSID MD1030017) 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 Hereford High School serve?

Hereford High School reports serving 1,300 people through 4 service connections in Baltimore County, Maryland.

Where does Hereford High School 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 Hereford High School have any drinking water violations?

EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2010. 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 Hereford High School'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. EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2010. For current results, consult EPA ECHO, or the MD state drinking water program.

Where can I find Hereford High School's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Hereford High School 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 Baltimore County

Water system	County	Population served	Type	Source
Manor Shopping Center	Baltimore	2,921	Non-transient non-community	Purchased surface water
Um Saint Joseph Medical Center	Baltimore	1,515	Non-transient non-community	Purchased surface water
Stevenson University	Baltimore	1,313	Non-transient non-community	Groundwater
Fork Christian Church	Baltimore	1,245	Transient non-community	Groundwater
Hereford Middle School	Baltimore	1,050	Non-transient non-community	Groundwater
Royal Farms #185	Baltimore	1,031	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, “Hereford High School, PWSID MD1030017, Maryland”, https://aquacensus.com/water-systems/maryland/hereford-high-school-md1030017 (data as of October 1, 2026).