Public water system · CA4210006
ActiveLompoc-City Water Utility Div
At a glance
Lompoc-City Water Utility Div (PWSID CA4210006) is an active community water system in Santa Barbara County, California. It reports serving 40,473 people through 9,914 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; all are health-based, and the most recent began in October 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40,473
Service connections
9,914
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Lompoc-City Water Utility Div compare with other water systems in Santa Barbara County?
By EPA's size categories, Lompoc-City Water Utility Div is a large system (10,001 to 100,000 people). Santa Barbara County has 150 active public water systems, and Lompoc-City Water Utility Div is the 4th-largest of them by population served. Its population served is about 12 times the county average of 3,255 people per system, and accounts for 8.3% of the 488,317 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 Lompoc-City Water Utility Div is about 6 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 Lompoc-City Water Utility Div?
EPA lists Lompoc-City Water Utility Div 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. 24 of the 150 active systems in Santa Barbara County (16%) are also owned by a local government.
Does Lompoc-City Water Utility Div have drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in October 2009. The violations listed here began between July 1993 and October 2009. By type: 3 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (3 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2009-10-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1996-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1993-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 3 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.
Lompoc-City Water Utility Div: frequently asked questions
Who runs Lompoc-City Water Utility Div?
Lompoc-City Water Utility Div (PWSID CA4210006) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Lompoc-City Water Utility Div serve?
Lompoc-City Water Utility Div reports serving 40,473 people through 9,914 service connections in Santa Barbara County, California.
Where does Lompoc-City Water Utility Div 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 Lompoc-City Water Utility Div have any drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in October 2009. 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 Lompoc-City Water Utility Div'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 3 violations for this system; all are health-based, and the most recent began in October 2009. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Lompoc-City Water Utility Div's water quality report?
As a community water system, Lompoc-City Water Utility Div 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 Barbara County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Santa Maria Utilities Department | Santa Barbara | 109,477 | Community | Purchased surface water |
| City of Santa Barbara Water Department | Santa Barbara | 99,323 | Community | Surface water |
| Goleta Water District | Santa Barbara | 84,462 | Community | Surface water |
| Golden State Water Company - Orcutt | Santa Barbara | 34,102 | Community | Purchased surface water |
| Carpinteria Valley Water District | Santa Barbara | 15,996 | Community | Purchased surface water |
| American Water O&M, LLC - Vsfb | Santa Barbara | 14,971 | 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, “Lompoc-City Water Utility Div, PWSID CA4210006, California”, https://aquacensus.com/water-systems/california/lompoc-city-water-utility-div-ca4210006 (data as of October 1, 2026).