Public water system · MD1120032

Active

Prospect Mill Elementary

At a glance

Prospect Mill Elementary (PWSID MD1120032) is an active non-transient non-community water system in Harford County, Maryland. It reports serving 691 people through 1 service connection. 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 January 2022.

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

Population served

691

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMD1120032

System typeNon-transient non-community water system

Activity statusActive

Population served691

Service connections1

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMD state drinking water program

City served—

StateMaryland

ZIP—

CountyHarford County

How does Prospect Mill Elementary compare with other water systems in Harford County?

By EPA's size categories, Prospect Mill Elementary is a small system (501 to 3,300 people). Harford County has 226 active public water systems. Its population served is about 28% below the county average of 956 people per system, and accounts for 0.3% of the 215,993 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 Prospect Mill Elementary is about 61% above 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 Prospect Mill Elementary?

EPA lists Prospect Mill Elementary 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. 45 of the 226 active systems in Harford County (20%) are also owned by a local government.

Does Prospect Mill Elementary have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2022. The violations listed here began between January 1999 and January 2022. By type: 7 monitoring and reporting, 3 monitoring, 1 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (5 of them). EPA lists 10 as resolved and 2 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2022-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2021-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2021-01-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2019-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2019-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2011-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2011-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2005-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2001-01-01	Required treatment not metOCCT/SOWT Study/Recommendation · code 57	Lead and Copper Rulecode 5000	Yes	Resolved
2001-01-01	Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56	Lead and Copper Rulecode 5000	No	Resolved
2001-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1999-01-01	Monitoring and reportingMonitoring, Regular · code 03	Toluenecode 2991	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.

Prospect Mill Elementary: frequently asked questions

Who runs Prospect Mill Elementary?

Prospect Mill Elementary (PWSID MD1120032) 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 Prospect Mill Elementary serve?

Prospect Mill Elementary reports serving 691 people through 1 service connection in Harford County, Maryland.

Where does Prospect Mill Elementary 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 Prospect Mill Elementary 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 January 2022. 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 Prospect Mill Elementary'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 January 2022. For current results, consult EPA ECHO, or the MD state drinking water program.

Where can I find Prospect Mill Elementary's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Prospect Mill Elementary 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 Harford County

Water system	County	Population served	Type	Source
Harford County D.P.W.	Harford	104,567	Community	Surface water
City of Aberdeen	Harford	18,006	Community	Purchased surface water
Chapel Hill - Aberdeen Proving Grounds	Harford	15,000	Community	Groundwater
City of Havre De Grace	Harford	14,000	Community	Surface water
Maryland American Water Company	Harford	13,200	Community	Surface water
Harford Community College - Main Campus	Harford	2,500	Non-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, “Prospect Mill Elementary, PWSID MD1120032, Maryland”, https://aquacensus.com/water-systems/maryland/prospect-mill-elementary-md1120032 (data as of October 1, 2026).