Public water system · MD0030210
ActiveOldfields School
At a glance
Oldfields School (PWSID MD0030210) is an active non-transient non-community water system in Baltimore County, Maryland. It reports serving 36 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
36
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Oldfields School compare with other water systems in Baltimore County?
By EPA's size categories, Oldfields School is a very small system (500 people or fewer). Baltimore County has 272 active public water systems. Its population served is well below the county average of 168 people per system, and accounts for less than 0.1% 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 Oldfields School is well below 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 Oldfields School?
EPA lists Oldfields School 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. 221 of the 272 active systems in Baltimore County (81%) are also privately owned.
Does Oldfields School have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in October 2024. The violations listed here began between September 2004 and October 2024. By type: 2 required treatment not met, 2 monitoring and reporting, 1 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 6 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 |
| 2020-04-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2016-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2012-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 6 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.
Oldfields School: frequently asked questions
Who runs Oldfields School?
Oldfields School (PWSID MD0030210) is a non-transient non-community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Oldfields School serve?
Oldfields School reports serving 36 people through 1 service connection in Baltimore County, Maryland.
Where does Oldfields 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 Oldfields School have any drinking water violations?
EPA's records list 6 violations for this system; 3 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 Oldfields 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 6 violations for this system; 3 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 Oldfields School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Oldfields 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 |
| Hereford High School | Baltimore | 1,300 | 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 |
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, “Oldfields School, PWSID MD0030210, Maryland”, https://aquacensus.com/water-systems/maryland/oldfields-school-md0030210 (data as of October 1, 2026).