Public water system · MD1130027
ActiveTriadelphia Ridge Elementary
At a glance
Triadelphia Ridge Elementary (PWSID MD1130027) is an active non-transient non-community water system in Howard County, Maryland. It reports serving 507 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in October 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
507
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Triadelphia Ridge Elementary compare with other water systems in Howard County?
By EPA's size categories, Triadelphia Ridge Elementary is a small system (501 to 3,300 people). Howard County has 87 active public water systems. Its population served is well below the county average of 3,556 people per system, and accounts for 0.2% of the 309,341 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 Triadelphia Ridge Elementary is about 18% 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 Triadelphia Ridge Elementary?
EPA lists Triadelphia Ridge 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. 22 of the 87 active systems in Howard County (25%) are also owned by a local government.
Does Triadelphia Ridge Elementary have drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in October 2013. The violations listed here began between January 1999 and October 2013. By type: 3 monitoring and reporting, 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 (4 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1999-07-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 1999-07-01 | Monitoring and reportingInitial, Follow-up, or Routine Source Water M/R · code 56 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1999-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
All 5 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.
Triadelphia Ridge Elementary: frequently asked questions
Who runs Triadelphia Ridge Elementary?
Triadelphia Ridge Elementary (PWSID MD1130027) 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 Triadelphia Ridge Elementary serve?
Triadelphia Ridge Elementary reports serving 507 people through 1 service connection in Howard County, Maryland.
Where does Triadelphia Ridge 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 Triadelphia Ridge Elementary have any drinking water violations?
EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in October 2013. 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 Triadelphia Ridge 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. EPA's records list 5 violations for this system; 2 are health-based, and the most recent began in October 2013. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Triadelphia Ridge Elementary's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Triadelphia Ridge 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 Howard County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Howard County D.P.W. Distribution | Howard | 286,158 | Community | Purchased surface water |
| Glenelg High School | Howard | 1,532 | Non-transient non-community | Groundwater |
| Bushy Park Es/Glenwood Ms Complex | Howard | 1,500 | Non-transient non-community | Groundwater |
| Highs of Cooksville | Howard | 1,321 | Transient non-community | Groundwater |
| Royal Farms Store | Howard | 1,015 | Transient non-community | Groundwater |
| Glenelg Country School | Howard | 950 | 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, “Triadelphia Ridge Elementary, PWSID MD1130027, Maryland”, https://aquacensus.com/water-systems/maryland/triadelphia-ridge-elementary-md1130027 (data as of October 1, 2026).