Public water system · CA0707532
ActiveMcavoy Yacht Harbor
At a glance
Mcavoy Yacht Harbor (PWSID CA0707532) is an active transient non-community water system in Contra Costa County, California. It reports serving 55 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 1984.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
55
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mcavoy Yacht Harbor compare with other water systems in Contra Costa County?
By EPA's size categories, Mcavoy Yacht Harbor 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 Mcavoy Yacht Harbor is about 62% 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 Mcavoy Yacht Harbor?
EPA lists Mcavoy Yacht Harbor 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. 57 of the 84 active systems in Contra Costa County (68%) are also privately owned.
Does Mcavoy Yacht Harbor have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 1984. The violations listed here began between February 1983 and August 1984. By type: 4 public notice, recordkeeping or other. EPA lists 4 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1984-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-05-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1983-02-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Mcavoy Yacht Harbor: frequently asked questions
Who runs Mcavoy Yacht Harbor?
Mcavoy Yacht Harbor (PWSID CA0707532) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Mcavoy Yacht Harbor serve?
Mcavoy Yacht Harbor reports serving 55 people through 4 service connections in Contra Costa County, California.
Where does Mcavoy Yacht Harbor 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 Mcavoy Yacht Harbor have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in August 1984. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Mcavoy Yacht Harbor'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 records list 4 violations for this system; none is health-based, and the most recent began in August 1984. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mcavoy Yacht Harbor's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mcavoy Yacht Harbor 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, “Mcavoy Yacht Harbor, PWSID CA0707532, California”, https://aquacensus.com/water-systems/california/mcavoy-yacht-harbor-ca0707532 (data as of October 1, 2026).