Public water system · CA1510018
ActiveRosamond Csd
At a glance
Rosamond Csd (PWSID CA1510018) is an active community water system in Kern County, California. It reports serving 17,711 people through 5,293 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; all are health-based, and the most recent began in October 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
17,711
Service connections
5,293
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Rosamond Csd compare with other water systems in Kern County?
By EPA's size categories, Rosamond Csd is a large system (10,001 to 100,000 people). Kern County has 327 active public water systems. Its population served is about 5.6 times the county average of 3,140 people per system, and accounts for 1.7% of the 1,026,649 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 Rosamond Csd is about 164% above 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Rosamond Csd?
EPA lists Rosamond Csd 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. 48 of the 327 active systems in Kern County (15%) are also owned by a local government.
Does Rosamond Csd have drinking water violations?
EPA's records list 11 violations for this system; all are health-based, and the most recent began in October 2008. The violations listed here began between September 1992 and October 2008. By type: 11 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (6 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2008-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2008-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2007-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2007-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 1997-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 11 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.
Rosamond Csd: frequently asked questions
Who runs Rosamond Csd?
Rosamond Csd (PWSID CA1510018) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Rosamond Csd serve?
Rosamond Csd reports serving 17,711 people through 5,293 service connections in Kern County, California.
Where does Rosamond Csd get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Rosamond Csd have any drinking water violations?
EPA's records list 11 violations for this system; all are health-based, and the most recent began in October 2008. 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 Rosamond Csd'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 11 violations for this system; all are health-based, and the most recent began in October 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Rosamond Csd's water quality report?
As a community water system, Rosamond Csd 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 Kern County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cws - Bakersfield | Kern | 267,881 | Community | Surface water |
| Bakersfield, City of | Kern | 160,144 | Community | Purchased surface water |
| Delano, City of | Kern | 51,428 | Community | Groundwater |
| Oildale Mwc | Kern | 44,899 | Community | Purchased surface water |
| Indian Wells Valley W.D. | Kern | 41,580 | Community | Groundwater |
| Tejon Castac Wd - I5 & Laval Rd | Kern | 38,125 | 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, “Rosamond Csd, PWSID CA1510018, California”, https://aquacensus.com/water-systems/california/rosamond-csd-ca1510018 (data as of October 1, 2026).