Public water system · CA1910020
ActiveCal-Am Water Company - East Pasadena
At a glance
Cal-Am Water Company - East Pasadena (PWSID CA1910020) is an active community water system in Los Angeles County, California. It reports serving 9,949 people through 3,019 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2002.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,949
Service connections
3,019
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cal-Am Water Company - East Pasadena compare with other water systems in Los Angeles County?
By EPA's size categories, Cal-Am Water Company - East Pasadena is a medium system (3,301 to 10,000 people). Los Angeles County has 275 active public water systems. Its population served is well below the county average of 36,762 people per system, and accounts for less than 0.1% of the 10,109,668 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 Cal-Am Water Company - East Pasadena is about 48% 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. 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 Cal-Am Water Company - East Pasadena?
EPA lists Cal-Am Water Company - East Pasadena 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. 150 of the 275 active systems in Los Angeles County (55%) are also privately owned.
Does Cal-Am Water Company - East Pasadena have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2002. The violations listed here began between December 1995 and May 2002. By type: 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Total coliform bacteria (TCR) and Nitrate. EPA lists 2 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 |
|---|---|---|---|---|
| 2002-05-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
All 2 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.
Cal-Am Water Company - East Pasadena: frequently asked questions
Who runs Cal-Am Water Company - East Pasadena?
Cal-Am Water Company - East Pasadena (PWSID CA1910020) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Cal-Am Water Company - East Pasadena serve?
Cal-Am Water Company - East Pasadena reports serving 9,949 people through 3,019 service connections in Los Angeles County, California.
Where does Cal-Am Water Company - East Pasadena 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 Cal-Am Water Company - East Pasadena have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2002. 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 Cal-Am Water Company - East Pasadena'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 2 violations for this system; 1 is health-based, and the most recent began in May 2002. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Cal-Am Water Company - East Pasadena's water quality report?
As a community water system, Cal-Am Water Company - East Pasadena 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 Los Angeles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 3,875,566 | Community | Surface water |
| Long Beach Utilities Department | Los Angeles | 466,772 | Community | Purchased surface water |
| Santa Clarita Valley Water Agency | Los Angeles | 294,090 | Community | Surface water |
| Gswc - Southwest | Los Angeles | 277,740 | Community | Purchased surface water |
| San Gabriel Valley Water Co.-El Monte | Los Angeles | 248,000 | Community | Groundwater |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | Los Angeles | 208,129 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Cal-Am Water Company - East Pasadena, PWSID CA1910020, California”, https://aquacensus.com/water-systems/california/cal-am-water-company-east-pasadena-ca1910020 (data as of October 1, 2026).