Public water system · CA3610005
ActiveLake Arrowhead Csd
At a glance
Lake Arrowhead Csd (PWSID CA3610005) is an active community water system in San Bernardino County, California. It reports serving 7,038 people through 7,940 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,038
Service connections
7,940
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Lake Arrowhead Csd compare with other water systems in San Bernardino County?
By EPA's size categories, Lake Arrowhead Csd is a medium system (3,301 to 10,000 people). San Bernardino County has 306 active public water systems. Its population served is about 24% below the county average of 9,227 people per system, and accounts for 0.2% of the 2,823,318 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 Lake Arrowhead Csd is roughly in line with 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 Lake Arrowhead Csd?
EPA lists Lake Arrowhead 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. 74 of the 306 active systems in San Bernardino County (24%) are also owned by a local government.
Does Lake Arrowhead Csd have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Lake Arrowhead Csd. For the latest compliance status, check EPA ECHO for current compliance history.
Lake Arrowhead Csd: frequently asked questions
Who runs Lake Arrowhead Csd?
Lake Arrowhead Csd (PWSID CA3610005) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Lake Arrowhead Csd serve?
Lake Arrowhead Csd reports serving 7,038 people through 7,940 service connections in San Bernardino County, California.
Where does Lake Arrowhead Csd 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 Lake Arrowhead Csd have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Lake Arrowhead 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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Lake Arrowhead Csd's water quality report?
As a community water system, Lake Arrowhead 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 San Bernardino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Gabriel Valley Wc - Fontana | San Bernardino | 237,700 | Community | Surface water |
| San Bernardino City | San Bernardino | 214,665 | Community | Groundwater |
| Cucamonga Valley Water District | San Bernardino | 211,069 | Community | Surface water |
| Ontario Municipal Utilities Company | San Bernardino | 185,010 | Community | Purchased surface water |
| Victorville Water District | San Bernardino | 135,983 | Community | Purchased surface water |
| San Bernardino Valley Wd | San Bernardino | 109,608 | 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, “Lake Arrowhead Csd, PWSID CA3610005, California”, https://aquacensus.com/water-systems/california/lake-arrowhead-csd-ca3610005 (data as of October 1, 2026).