Public water system · CA1900018
ActiveMartin Marietta Southern Calif Aggregate
At a glance
Martin Marietta Southern Calif Aggregate (PWSID CA1900018) is an active non-transient non-community water system in Los Angeles County, California. It reports serving 60 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
60
Service connections
4
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Martin Marietta Southern Calif Aggregate compare with other water systems in Los Angeles County?
By EPA's size categories, Martin Marietta Southern Calif Aggregate is a very small system (500 people or fewer). Los Angeles County has 275 active public water systems. Its population served is well below the county average of 36,762 people per system, and accounts for less than 0.1% of the 10,109,668 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Martin Marietta Southern Calif Aggregate 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. California has 1,466 active non-transient non-community water systems, 20% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Martin Marietta Southern Calif Aggregate?
EPA lists Martin Marietta Southern Calif Aggregate as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 150 of the 275 active systems in Los Angeles County (55%) are also privately owned.
Does Martin Marietta Southern Calif Aggregate have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Martin Marietta Southern Calif Aggregate. For the latest compliance status, check EPA ECHO for current compliance history.
Martin Marietta Southern Calif Aggregate: frequently asked questions
Who runs Martin Marietta Southern Calif Aggregate?
Martin Marietta Southern Calif Aggregate (PWSID CA1900018) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Martin Marietta Southern Calif Aggregate serve?
Martin Marietta Southern Calif Aggregate reports serving 60 people through 4 service connections in Los Angeles County, California.
Where does Martin Marietta Southern Calif Aggregate 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 Martin Marietta Southern Calif Aggregate have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Martin Marietta Southern Calif Aggregate'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Martin Marietta Southern Calif Aggregate's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Martin Marietta Southern Calif Aggregate 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 Los Angeles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 3,875,566 | Community | Surface water |
| Long Beach Utilities Department | Los Angeles | 466,772 | Community | Purchased surface water |
| Santa Clarita Valley Water Agency | Los Angeles | 294,090 | Community | Surface water |
| Gswc - Southwest | Los Angeles | 277,740 | Community | Purchased surface water |
| San Gabriel Valley Water Co.-El Monte | Los Angeles | 248,000 | Community | Groundwater |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | Los Angeles | 208,129 | 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, “Martin Marietta Southern Calif Aggregate, PWSID CA1900018, California”, https://aquacensus.com/water-systems/california/martin-marietta-southern-calif-aggregate-ca1900018 (data as of October 1, 2026).