Public water system · CA2100552
ActiveWilliam Tell House
At a glance
William Tell House (PWSID CA2100552) is an active transient non-community water system in Marin County, Florida. It reports serving 110 people through 4 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 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
110
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does William Tell House compare with other water systems in Marin County?
By EPA's size categories, William Tell House is a very small system (500 people or fewer). Marin County has 1 active public water system, and William Tell House is the largest of them by population served. Its population served is roughly in line with the county average of 110 people per system, and accounts for 100% of the 110 people reported by systems filed under the county. Across Florida, the 5,197 active systems average 4,345 people each. Nationally, the average active transient non-community water system reports serving 144 people, so William Tell House is about 24% 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. Florida has 2,777 active transient non-community water systems, 53% of the state's 5,197 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,996 Florida systems (96%) list groundwater as their primary source.
Who owns and regulates William Tell House?
EPA lists William Tell House 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. 1 of the 1 active systems in Marin County (100%) are also privately owned.
Does William Tell House have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2008. The violations listed here began between July 1984 and May 2008. By type: 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2008-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1984-07-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
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.
William Tell House: frequently asked questions
Who runs William Tell House?
William Tell House (PWSID CA2100552) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does William Tell House serve?
William Tell House reports serving 110 people through 4 service connections in Marin County, Florida.
Where does William Tell House 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 William Tell House 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 2008. 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 William Tell House'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 2008. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find William Tell House's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. William Tell House 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, “William Tell House, PWSID CA2100552, Florida”, https://aquacensus.com/water-systems/florida/william-tell-house-ca2100552 (data as of October 1, 2026).