Public water system · CA1400115
ActiveCal Trans - Coso Junction
At a glance
Cal Trans - Coso Junction (PWSID CA1400115) is an active transient non-community water system in Inyo County, California. It reports serving 1,000 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,000
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cal Trans - Coso Junction compare with other water systems in Inyo County?
By EPA's size categories, Cal Trans - Coso Junction is a small system (501 to 3,300 people). Inyo County has 112 active public water systems. Its population served is about 127% above the county average of 442 people per system, and accounts for 2% of the 49,451 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Cal Trans - Coso Junction is about 6.9 times 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. California has 3,016 active transient non-community water systems, 40% 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 Cal Trans - Coso Junction?
EPA lists Cal Trans - Coso Junction as owned by a state government. 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. 6 of the 112 active systems in Inyo County (5.4%) are also owned by a state government.
Does Cal Trans - Coso Junction 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 Cal Trans - Coso Junction. For the latest compliance status, check EPA ECHO for current compliance history.
Cal Trans - Coso Junction: frequently asked questions
Who runs Cal Trans - Coso Junction?
Cal Trans - Coso Junction (PWSID CA1400115) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Cal Trans - Coso Junction serve?
Cal Trans - Coso Junction reports serving 1,000 people through 1 service connection in Inyo County, California.
Where does Cal Trans - Coso Junction 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 Cal Trans - Coso Junction have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Cal Trans - Coso Junction'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 Cal Trans - Coso Junction's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cal Trans - Coso Junction 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 Inyo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bishop Creek Chevron | Inyo | 16,793 | Transient non-community | Groundwater |
| Bishop, City of | Inyo | 3,819 | Community | Groundwater |
| Petite Pantry | Inyo | 3,012 | Transient non-community | Groundwater |
| Lee'S Frontier | Inyo | 2,000 | Transient non-community | Groundwater |
| Inyo County PWD - Lone Pine | Inyo | 1,835 | Community | Purchased groundwater |
| Pearsonville Water System | Inyo | 1,515 | 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, “Cal Trans - Coso Junction, PWSID CA1400115, California”, https://aquacensus.com/water-systems/california/cal-trans-coso-junction-ca1400115 (data as of October 1, 2026).