Public water system · CA2010018
ActivePreserve at Millerton Lake Water System
At a glance
Preserve at Millerton Lake Water System (PWSID CA2010018) is an active community water system in Madera County, California. It reports serving 600 people through 243 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
600
Service connections
243
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Preserve at Millerton Lake Water System compare with other water systems in Madera County?
By EPA's size categories, Preserve at Millerton Lake Water System is a small system (501 to 3,300 people). Madera County has 202 active public water systems. Its population served is about 34% below the county average of 915 people per system, and accounts for 0.3% of the 184,760 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Preserve at Millerton Lake Water System is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active 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 Preserve at Millerton Lake Water System?
EPA lists Preserve at Millerton Lake Water System 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. 139 of the 202 active systems in Madera County (69%) are also privately owned.
Does Preserve at Millerton Lake Water System 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 Preserve at Millerton Lake Water System. For the latest compliance status, check EPA ECHO for current compliance history.
Preserve at Millerton Lake Water System: frequently asked questions
Who runs Preserve at Millerton Lake Water System?
Preserve at Millerton Lake Water System (PWSID CA2010018) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Preserve at Millerton Lake Water System serve?
Preserve at Millerton Lake Water System reports serving 600 people through 243 service connections in Madera County, California.
Where does Preserve at Millerton Lake Water System 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 Preserve at Millerton Lake Water System have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Preserve at Millerton Lake Water System'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 the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Preserve at Millerton Lake Water System's water quality report?
As a community water system, Preserve at Millerton Lake Water System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Madera County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Madera | Madera | 66,560 | Community | Groundwater |
| Chowchilla City Water Dept | Madera | 13,916 | Community | Groundwater |
| Lupine Bass Lake | Madera | 11,930 | Transient non-community | Groundwater |
| Madera Valley Water Company | Madera | 6,494 | Community | Groundwater |
| Riverstone/Rootcreek Water District | Madera | 5,507 | Community | Groundwater |
| Yosemite Spring Park Util Co | Madera | 5,300 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Preserve at Millerton Lake Water System, PWSID CA2010018, California”, https://aquacensus.com/water-systems/california/preserve-at-millerton-lake-water-system-ca2010018 (data as of October 1, 2026).