Public water system · CA5601144

Active

Rancho Sespe Workers Imp Assoc

At a glance

Rancho Sespe Workers Imp Assoc (PWSID CA5601144) is an active community water system in Ventura County, California. It reports serving 600 people through 109 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in April 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

600

Service connections

109

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDCA5601144

System typeCommunity water system

Activity statusActive

Population served600

Service connections109

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyCA state drinking water program

City served—

StateCalifornia

ZIP—

CountyVentura County

How does Rancho Sespe Workers Imp Assoc compare with other water systems in Ventura County?

By EPA's size categories, Rancho Sespe Workers Imp Assoc is a small system (501 to 3,300 people). Ventura County has 95 active public water systems. Its population served is well below the county average of 9,293 people per system, and accounts for less than 0.1% of the 882,799 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 Rancho Sespe Workers Imp Assoc 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 Rancho Sespe Workers Imp Assoc?

EPA lists Rancho Sespe Workers Imp Assoc 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. 59 of the 95 active systems in Ventura County (62%) are also privately owned.

Does Rancho Sespe Workers Imp Assoc have drinking water violations?

EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in April 2024. The violations listed here began between July 1993 and April 2024. By type: 5 monitoring and reporting, 2 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 7 as resolved and 1 as archived. 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. 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
2024-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Archived
2023-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2001-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1998-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1998-08-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	Resolved
1997-09-01	Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25	Total coliform bacteria (TCR)code 3100	No	Resolved
1993-07-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	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.

Rancho Sespe Workers Imp Assoc: frequently asked questions

Who runs Rancho Sespe Workers Imp Assoc?

Rancho Sespe Workers Imp Assoc (PWSID CA5601144) is a community water system privately owned. It is regulated by the CA state drinking water program.

How many people does Rancho Sespe Workers Imp Assoc serve?

Rancho Sespe Workers Imp Assoc reports serving 600 people through 109 service connections in Ventura County, California.

Where does Rancho Sespe Workers Imp Assoc 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 Rancho Sespe Workers Imp Assoc have any drinking water violations?

EPA's records list 8 violations for this system; 1 is health-based, and the most recent began in April 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 Rancho Sespe Workers Imp Assoc'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; 1 is health-based, and the most recent began in April 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 Rancho Sespe Workers Imp Assoc's water quality report?

As a community water system, Rancho Sespe Workers Imp Assoc 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 Ventura County

Water system	County	Population served	Type	Source
Oxnard Water Dept	Ventura	200,232	Community	Purchased surface water
Ventura Water Department	Ventura	113,500	Community	Surface water
Ventura Wwd No. 8 - Simi Valley	Ventura	94,738	Community	Purchased surface water
Cal American Water Co	Ventura	66,809	Community	Purchased surface water
City of Thousand Oaks Water Department	Ventura	53,157	Community	Purchased surface water
Camarillo Water Dept	Ventura	46,824	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, “Rancho Sespe Workers Imp Assoc, PWSID CA5601144, California”, https://aquacensus.com/water-systems/california/rancho-sespe-workers-imp-assoc-ca5601144 (data as of October 1, 2026).