Public water system · CA3901216
ActiveSantos Ranch Pws #5-Csa #35
At a glance
Santos Ranch Pws #5-Csa #35 (PWSID CA3901216) is an active community water system in San Joaquin County, California. It reports serving 320 people through 97 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
320
Service connections
97
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Santos Ranch Pws #5-Csa #35 compare with other water systems in San Joaquin County?
By EPA's size categories, Santos Ranch Pws #5-Csa #35 is a very small system (500 people or fewer). San Joaquin County has 302 active public water systems. Its population served is well below the county average of 2,571 people per system, and accounts for less than 0.1% of the 776,334 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 Santos Ranch Pws #5-Csa #35 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 Santos Ranch Pws #5-Csa #35?
EPA lists Santos Ranch Pws #5-Csa #35 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. 69 of the 302 active systems in San Joaquin County (23%) are also owned by a local government.
Does Santos Ranch Pws #5-Csa #35 have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2002. By type: 1 public notice, recordkeeping or other. The contaminant or rule involved is Consumer Confidence Rule. EPA lists 1 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
The one violation in EPA's records.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.
Santos Ranch Pws #5-Csa #35: frequently asked questions
Who runs Santos Ranch Pws #5-Csa #35?
Santos Ranch Pws #5-Csa #35 (PWSID CA3901216) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Santos Ranch Pws #5-Csa #35 serve?
Santos Ranch Pws #5-Csa #35 reports serving 320 people through 97 service connections in San Joaquin County, California.
Where does Santos Ranch Pws #5-Csa #35 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 Santos Ranch Pws #5-Csa #35 have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2002. 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 Santos Ranch Pws #5-Csa #35'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 one violation for this system; it is not health-based, and the most recent began in July 2002. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Santos Ranch Pws #5-Csa #35's water quality report?
As a community water system, Santos Ranch Pws #5-Csa #35 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 San Joaquin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Stockton | San Joaquin | 191,302 | Community | Surface water |
| California Water Service - Stockton | San Joaquin | 176,266 | Community | Purchased surface water |
| Tracy, City of | San Joaquin | 96,609 | Community | Surface water |
| Manteca, City of | San Joaquin | 84,928 | Community | Purchased surface water |
| Lodi, City of | San Joaquin | 68,272 | Community | Surface water |
| City of Lathrop | San Joaquin | 35,080 | 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, “Santos Ranch Pws #5-Csa #35, PWSID CA3901216, California”, https://aquacensus.com/water-systems/california/santos-ranch-pws-5-csa-35-ca3901216 (data as of October 1, 2026).