Public water system · CA1901000
ActiveGeneral Atomics Aeronautical - Gray Butt
At a glance
General Atomics Aeronautical - Gray Butt (PWSID CA1901000) is an active non-transient non-community water system in Los Angeles County, California. It reports serving 450 people through 24 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
450
Service connections
24
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does General Atomics Aeronautical - Gray Butt compare with other water systems in Los Angeles County?
By EPA's size categories, General Atomics Aeronautical - Gray Butt 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 General Atomics Aeronautical - Gray Butt is roughly in line with 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 General Atomics Aeronautical - Gray Butt?
EPA lists General Atomics Aeronautical - Gray Butt 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 General Atomics Aeronautical - Gray Butt 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 General Atomics Aeronautical - Gray Butt. For the latest compliance status, check EPA ECHO for current compliance history.
General Atomics Aeronautical - Gray Butt: frequently asked questions
Who runs General Atomics Aeronautical - Gray Butt?
General Atomics Aeronautical - Gray Butt (PWSID CA1901000) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does General Atomics Aeronautical - Gray Butt serve?
General Atomics Aeronautical - Gray Butt reports serving 450 people through 24 service connections in Los Angeles County, California.
Where does General Atomics Aeronautical - Gray Butt 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 General Atomics Aeronautical - Gray Butt have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is General Atomics Aeronautical - Gray Butt'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 General Atomics Aeronautical - Gray Butt's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. General Atomics Aeronautical - Gray Butt 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, “General Atomics Aeronautical - Gray Butt, PWSID CA1901000, California”, https://aquacensus.com/water-systems/california/general-atomics-aeronautical-gray-butt-ca1901000 (data as of October 1, 2026).