Public water system · CA4901381
ActiveLichau Hylands Mutual Water Company
At a glance
Lichau Hylands Mutual Water Company (PWSID CA4901381) is an active community water system in Sonoma County, California. It reports serving 56 people through 20 service connections. Its primary water source is groundwater, 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
56
Service connections
20
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lichau Hylands Mutual Water Company compare with other water systems in Sonoma County?
By EPA's size categories, Lichau Hylands Mutual Water Company is a very small system (500 people or fewer). Sonoma County has 441 active public water systems. Its population served is well below the county average of 1,092 people per system, and accounts for less than 0.1% of the 481,435 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 Lichau Hylands Mutual Water Company is well below 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 Lichau Hylands Mutual Water Company?
EPA lists Lichau Hylands Mutual Water Company 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. 58 of the 441 active systems in Sonoma County (13%) are also owned by a local government.
Does Lichau Hylands Mutual Water Company 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 Lichau Hylands Mutual Water Company. For the latest compliance status, check EPA ECHO for current compliance history.
Lichau Hylands Mutual Water Company: frequently asked questions
Who runs Lichau Hylands Mutual Water Company?
Lichau Hylands Mutual Water Company (PWSID CA4901381) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Lichau Hylands Mutual Water Company serve?
Lichau Hylands Mutual Water Company reports serving 56 people through 20 service connections in Sonoma County, California.
Where does Lichau Hylands Mutual Water Company 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 Lichau Hylands Mutual Water Company have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Lichau Hylands Mutual Water Company'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 Lichau Hylands Mutual Water Company's water quality report?
As a community water system, Lichau Hylands Mutual Water Company 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 Sonoma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Rosa, City of | Sonoma | 175,396 | Community | Groundwater |
| Petaluma, City of | Sonoma | 60,781 | Community | Groundwater |
| Rohnert Park, City of | Sonoma | 43,821 | Community | Groundwater |
| Windsor, Town of | Sonoma | 25,561 | Community | Groundwater |
| Valley of the Moon Water District | Sonoma | 23,107 | Community | Groundwater |
| Sonoma, City of | Sonoma | 11,725 | 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, “Lichau Hylands Mutual Water Company, PWSID CA4901381, California”, https://aquacensus.com/water-systems/california/lichau-hylands-mutual-water-company-ca4901381 (data as of October 1, 2026).