Public water system · CA2500565
ActiveAdin Supply Co.
At a glance
Adin Supply Co. (PWSID CA2500565) is an active transient non-community water system in Modoc County, California. It reports serving 25 people through 1 service connection. 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
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Adin Supply Co. compare with other water systems in Modoc County?
By EPA's size categories, Adin Supply Co. is a very small system (500 people or fewer). Modoc County has 16 active public water systems. Its population served is well below the county average of 347 people per system, and accounts for 0.5% of the 5,554 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 Adin Supply Co. is well 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. 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 Adin Supply Co.?
EPA lists Adin Supply Co. 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. 9 of the 16 active systems in Modoc County (56%) are also privately owned.
Does Adin Supply Co. 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 Adin Supply Co.. For the latest compliance status, check EPA ECHO for current compliance history.
Adin Supply Co.: frequently asked questions
Who runs Adin Supply Co.?
Adin Supply Co. (PWSID CA2500565) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Adin Supply Co. serve?
Adin Supply Co. reports serving 25 people through 1 service connection in Modoc County, California.
Where does Adin Supply Co. 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 Adin Supply Co. have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Adin Supply Co.'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 Adin Supply Co.'s water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Adin Supply Co. 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 Modoc County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Alturas | Modoc | 2,715 | Community | Groundwater |
| California Pines C.S.D. | Modoc | 862 | Community | Groundwater |
| Newell County Water District | Modoc | 629 | Community | Groundwater |
| Cedarville County Water Dist. | Modoc | 600 | Community | Groundwater |
| Mdf-Blue Lake Cg | Modoc | 200 | Transient non-community | Groundwater |
| Cal Fire-Devil'S Garden Camp | Modoc | 120 | 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, “Adin Supply Co., PWSID CA2500565, California”, https://aquacensus.com/water-systems/california/adin-supply-co-ca2500565 (data as of October 1, 2026).