Public water system · CA4410014
ActiveSan Lorenzo Valley Water Dist
At a glance
San Lorenzo Valley Water Dist (PWSID CA4410014) is an active community water system in Santa Cruz County, California. It reports serving 21,145 people through 6,496 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,145
Service connections
6,496
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does San Lorenzo Valley Water Dist compare with other water systems in Santa Cruz County?
By EPA's size categories, San Lorenzo Valley Water Dist is a large system (10,001 to 100,000 people). Santa Cruz County has 96 active public water systems, and San Lorenzo Valley Water Dist is the 4th-largest of them by population served. Its population served is about 7.4 times the county average of 2,856 people per system, and accounts for 7.7% of the 274,204 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 San Lorenzo Valley Water Dist is about 3.2 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates San Lorenzo Valley Water Dist?
EPA lists San Lorenzo Valley Water Dist 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. 16 of the 96 active systems in Santa Cruz County (17%) are also owned by a local government.
Does San Lorenzo Valley Water Dist have drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2024. The violations listed here began between January 1992 and October 2024. By type: 3 required treatment not met, 2 monitoring and reporting, 1 reporting, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Lead and Copper Rule Revisions (2 of them). EPA lists 6 as resolved and 2 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Unaddressed |
| 2013-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 1996-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1992-01-01 | Required treatment not metFailure to Filter (SWTR) · code 42 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 8 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.
San Lorenzo Valley Water Dist: frequently asked questions
Who runs San Lorenzo Valley Water Dist?
San Lorenzo Valley Water Dist (PWSID CA4410014) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does San Lorenzo Valley Water Dist serve?
San Lorenzo Valley Water Dist reports serving 21,145 people through 6,496 service connections in Santa Cruz County, California.
Where does San Lorenzo Valley Water Dist get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does San Lorenzo Valley Water Dist have any drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2024. 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 San Lorenzo Valley Water Dist'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 8 violations for this system; 4 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find San Lorenzo Valley Water Dist's water quality report?
As a community water system, San Lorenzo Valley Water Dist 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 Santa Cruz County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Cruz Water Department | Santa Cruz | 94,626 | Community | Surface water |
| Watsonville, City of | Santa Cruz | 65,231 | Community | Surface water |
| Soquel Creek Water District | Santa Cruz | 40,809 | Community | Purchased surface water |
| Cabrillo College | Santa Cruz | 12,000 | Non-transient non-community | Groundwater |
| Scotts Valley Water District | Santa Cruz | 11,197 | Community | Groundwater |
| Slvwd - Felton Water System | Santa Cruz | 4,340 | Community | 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, “San Lorenzo Valley Water Dist, PWSID CA4410014, California”, https://aquacensus.com/water-systems/california/san-lorenzo-valley-water-dist-ca4410014 (data as of October 1, 2026).