Public water system · IL3162065
ActiveMarianos Crystal Lake
At a glance
Marianos Crystal Lake (PWSID IL3162065) is an active transient non-community water system in McHenry County, California. It reports serving 25 people through 1 service connection. Its primary water source is purchased groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GWP
Purchased groundwater
System type
TNCWS
Transient non-community water system
System record
How does Marianos Crystal Lake compare with other water systems in McHenry County?
By EPA's size categories, Marianos Crystal Lake is a very small system (500 people or fewer). McHenry County has 1 active public water system, and Marianos Crystal Lake is the largest of them by population served. Its population served is roughly in line with the county average of 25 people per system, and accounts for 100% of the 25 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Marianos Crystal Lake is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. California has 3,016 active transient non-community water systems, 40% of the state's 7,479 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 76 California systems (1%) list purchased groundwater as their primary source.
Who owns and regulates Marianos Crystal Lake?
EPA lists Marianos Crystal Lake as privately owned. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 1 active systems in McHenry County (100%) are also privately owned.
Does Marianos Crystal Lake 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 Marianos Crystal Lake. For the latest compliance status, check EPA ECHO for current compliance history.
Marianos Crystal Lake: frequently asked questions
Who runs Marianos Crystal Lake?
Marianos Crystal Lake (PWSID IL3162065) is a transient non-community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Marianos Crystal Lake serve?
Marianos Crystal Lake reports serving 25 people through 1 service connection in McHenry County, California.
Where does Marianos Crystal Lake get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Marianos Crystal Lake have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Marianos Crystal Lake'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 EPA ECHO, or the IL state drinking water program.
Where can I find Marianos Crystal Lake's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Marianos Crystal Lake is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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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, “Marianos Crystal Lake, PWSID IL3162065, California”, https://aquacensus.com/water-systems/california/marianos-crystal-lake-il3162065 (data as of October 1, 2026).