Public water system · CA1510005
ActiveDelano, City of
At a glance
City of Delano (PWSID CA1510005) is an active community water system in Kern County, California. It reports serving 51,428 people through 10,295 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
51,428
Service connections
10,295
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Delano compare with other water systems in Kern County?
By EPA's size categories, City of Delano is a large system (10,001 to 100,000 people). Kern County has 327 active public water systems, and City of Delano is the 3rd-largest of them by population served. Its population served is about 16 times the county average of 3,140 people per system, and accounts for 5% 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 City of Delano is about 7.7 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. 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 City of Delano?
EPA lists City of Delano 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 City of Delano have drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2012. The violations listed here began between January 2010 and October 2012. By type: 12 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (12 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2012-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2012-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2012-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2011-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2011-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2011-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2010-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2010-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2010-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2010-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
The 12 most recent 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.
City of Delano: frequently asked questions
Who runs City of Delano?
City of Delano (PWSID CA1510005) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does City of Delano serve?
City of Delano reports serving 51,428 people through 10,295 service connections in Kern County, California.
Where does City of Delano 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 City of Delano have any drinking water violations?
Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2012. 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 City of Delano'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. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in October 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find City of Delano's water quality report?
As a community water system, City of Delano 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 |
| 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 |
| Vaughn Wc Inc. | Kern | 37,189 | Community | Groundwater |
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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, “Delano, City of, PWSID CA1510005, California”, https://aquacensus.com/water-systems/california/delano-city-of-ca1510005 (data as of October 1, 2026).