Public water system · CA2710001
ActiveAlco Water Service
At a glance
Alco Water Service (PWSID CA2710001) is an active community water system in Monterey County, California. It reports serving 56,253 people through 9,142 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in September 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
56,253
Service connections
9,142
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Alco Water Service compare with other water systems in Monterey County?
By EPA's size categories, Alco Water Service is a large system (10,001 to 100,000 people). Monterey County has 307 active public water systems, and Alco Water Service is the 3rd-largest of them by population served. Its population served is about 36 times the county average of 1,552 people per system, and accounts for 12% of the 476,419 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 Alco Water Service is about 8.4 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 Alco Water Service?
EPA lists Alco Water Service 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. 266 of the 307 active systems in Monterey County (87%) are also privately owned.
Does Alco Water Service have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in September 1994. The violations listed here began between January 1989 and September 1994. By type: 2 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 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 |
|---|---|---|---|---|
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1989-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | 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.
Alco Water Service: frequently asked questions
Who runs Alco Water Service?
Alco Water Service (PWSID CA2710001) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Alco Water Service serve?
Alco Water Service reports serving 56,253 people through 9,142 service connections in Monterey County, California.
Where does Alco Water Service 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 Alco Water Service have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in September 1994. 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 Alco Water Service'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; 2 are health-based, and the most recent began in September 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Alco Water Service's water quality report?
As a community water system, Alco Water Service 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 Monterey County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cwsc Salinas | Monterey | 123,679 | Community | Groundwater |
| Cal Am Water Company - Monterey | Monterey | 92,450 | Community | Groundwater under influence of surface water |
| Marina Coast Water District | Monterey | 38,377 | Community | Groundwater |
| Soledad, City of | Monterey | 19,455 | Community | Groundwater |
| Greenfield, City of | Monterey | 18,967 | Community | Groundwater |
| Cwsc King City | Monterey | 16,334 | 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, “Alco Water Service, PWSID CA2710001, California”, https://aquacensus.com/water-systems/california/alco-water-service-ca2710001 (data as of October 1, 2026).