Public water system · CA0707502
ActiveEbrpd Black Diamond Mines
At a glance
Ebrpd Black Diamond Mines (PWSID CA0707502) is an active transient non-community water system in Contra Costa County, California. It reports serving 74 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
74
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Ebrpd Black Diamond Mines compare with other water systems in Contra Costa County?
By EPA's size categories, Ebrpd Black Diamond Mines is a very small system (500 people or fewer). Contra Costa County has 84 active public water systems. Its population served is well below the county average of 6,726 people per system, and accounts for less than 0.1% of the 564,952 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 Ebrpd Black Diamond Mines is about half of 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 Ebrpd Black Diamond Mines?
EPA lists Ebrpd Black Diamond Mines as owned by a local 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. 25 of the 84 active systems in Contra Costa County (30%) are also owned by a local government.
Does Ebrpd Black Diamond Mines 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 Ebrpd Black Diamond Mines. For the latest compliance status, check EPA ECHO for current compliance history.
Ebrpd Black Diamond Mines: frequently asked questions
Who runs Ebrpd Black Diamond Mines?
Ebrpd Black Diamond Mines (PWSID CA0707502) is a transient non-community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Ebrpd Black Diamond Mines serve?
Ebrpd Black Diamond Mines reports serving 74 people through 4 service connections in Contra Costa County, California.
Where does Ebrpd Black Diamond Mines 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 Ebrpd Black Diamond Mines have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Ebrpd Black Diamond Mines' 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 Ebrpd Black Diamond Mines' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Ebrpd Black Diamond Mines 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 Contra Costa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Contra Costa Water District | Contra Costa | 198,000 | Community | Surface water |
| City of Antioch | Contra Costa | 115,074 | Community | Surface water |
| Brentwood | Contra Costa | 64,513 | Community | Purchased surface water |
| City of Pittsburg | Contra Costa | 62,500 | Community | Purchased surface water |
| Diablo Water District | Contra Costa | 43,357 | Community | Purchased surface water |
| City of Martinez | Contra Costa | 30,997 | 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, “Ebrpd Black Diamond Mines, PWSID CA0707502, California”, https://aquacensus.com/water-systems/california/ebrpd-black-diamond-mines-ca0707502 (data as of October 1, 2026).