Public water system · WY5601111
ActiveSylvan Bay Hoa
At a glance
Sylvan Bay Hoa (PWSID WY5601111) is an active transient non-community water system in Sublette County, Wyoming. It reports serving 25 people through 45 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in August 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
45
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Sylvan Bay Hoa compare with other water systems in Sublette County?
By EPA's size categories, Sylvan Bay Hoa is a very small system (500 people or fewer). Sublette County has 27 active public water systems. Its population served is well below the county average of 212 people per system, and accounts for 0.4% of the 5,723 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Sylvan Bay Hoa 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. Wyoming has 352 active transient non-community water systems, 45% of the state's 775 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 585 Wyoming systems (75%) list groundwater as their primary source.
Who owns and regulates Sylvan Bay Hoa?
EPA lists Sylvan Bay Hoa as privately owned. The WY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 20 of the 27 active systems in Sublette County (74%) are also privately owned.
Does Sylvan Bay Hoa have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in August 2009. The violations listed here began between April 1997 and August 2009. By type: 6 contaminant level above the legal limit and 6 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (11 of them). EPA lists 9 as archived and 3 as resolved. 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. 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 |
|---|---|---|---|---|
| 2009-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2008-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2007-09-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2006-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2004-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1997-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1997-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1997-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
The 12 most recent 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.
Sylvan Bay Hoa: frequently asked questions
Who runs Sylvan Bay Hoa?
Sylvan Bay Hoa (PWSID WY5601111) is a transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Sylvan Bay Hoa serve?
Sylvan Bay Hoa reports serving 25 people through 45 service connections in Sublette County, Wyoming.
Where does Sylvan Bay Hoa 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 Sylvan Bay Hoa have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in August 2009. 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 Sylvan Bay Hoa'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. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in August 2009. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Sylvan Bay Hoa's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sylvan Bay Hoa 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.
Other water systems in Sublette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pinedale Municipal Ws | Sublette | 1,900 | Community | Surface water |
| Marbleton, Town of | Sublette | 861 | Community | Groundwater |
| High Meadow Ranch | Sublette | 580 | Community | Groundwater |
| Bomgaars Supply, Incorporated | Sublette | 450 | Transient non-community | Groundwater |
| Big Piney, Town of | Sublette | 445 | Community | Groundwater |
| Jonah Energy (Linn) Oc | Sublette | 130 | Non-transient non-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, “Sylvan Bay Hoa, PWSID WY5601111, Wyoming”, https://aquacensus.com/water-systems/wyoming/sylvan-bay-hoa-wy5601111 (data as of October 1, 2026).