Public water system · IN2640834
ActiveMalden Oasis
At a glance
Malden Oasis (PWSID IN2640834) is an active transient non-community water system in Porter County, Indiana. It reports serving 51 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
51
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Malden Oasis compare with other water systems in Porter County?
By EPA's size categories, Malden Oasis is a very small system (500 people or fewer). Porter County has 81 active public water systems. Its population served is well below the county average of 748 people per system, and accounts for less than 0.1% of the 60,622 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Malden Oasis is about 65% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Indiana has 2,596 active transient non-community water systems, 65% of the state's 3,969 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,769 Indiana systems (95%) list groundwater as their primary source.
Who owns and regulates Malden Oasis?
EPA lists Malden Oasis as privately owned. The IN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 65 of the 81 active systems in Porter County (80%) are also privately owned.
Does Malden Oasis have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015. The violations listed here began between September 1992 and January 2015. By type: 5 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2015-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1992-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Malden Oasis: frequently asked questions
Who runs Malden Oasis?
Malden Oasis (PWSID IN2640834) is a transient non-community water system privately owned. It is regulated by the IN state drinking water program.
How many people does Malden Oasis serve?
Malden Oasis reports serving 51 people through 1 service connection in Porter County, Indiana.
Where does Malden Oasis 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 Malden Oasis have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2015. 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 Malden Oasis' 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; none is health-based, and the most recent began in January 2015. For current results, consult EPA ECHO, or the IN state drinking water program.
Where can I find Malden Oasis' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Malden Oasis is a 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 Porter County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Valparaiso Department of Water Works | Porter | 36,000 | Community | Groundwater |
| Hebron Water Department | Porter | 3,724 | Community | Groundwater |
| L-A-C Utilities | Porter | 2,441 | Community | Purchased groundwater |
| Kouts Water Works | Porter | 2,028 | Community | Groundwater |
| St. Elizabeth Seton Catholic | Porter | 1,201 | Transient non-community | Groundwater |
| Ogden Dunes Water | Porter | 1,110 | Community | Purchased surface water |
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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, “Malden Oasis, PWSID IN2640834, Indiana”, https://aquacensus.com/water-systems/indiana/malden-oasis-in2640834 (data as of October 1, 2026).