Public water system · WY5601376
ActiveLarson'S Park
At a glance
Larson'S Park (PWSID WY5601376) is an active transient non-community water system in Platte County, Wyoming. It reports serving 45 people through 16 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in January 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
45
Service connections
16
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Larson'S Park compare with other water systems in Platte County?
By EPA's size categories, Larson'S Park is a very small system (500 people or fewer). Platte County has 28 active public water systems. Its population served is well below the county average of 357 people per system, and accounts for 0.5% of the 9,999 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 Larson'S Park 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 Larson'S Park?
EPA lists Larson'S Park as owned by a local government. 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. 6 of the 28 active systems in Platte County (21%) are also owned by a local government.
Does Larson'S Park have drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in January 2010. The violations listed here began between July 1995 and January 2010. By type: 4 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 5 as archived and 1 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 |
|---|---|---|---|---|
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2001-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2001-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1996-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1996-07-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 6 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.
Larson'S Park: frequently asked questions
Who runs Larson'S Park?
Larson'S Park (PWSID WY5601376) is a transient non-community water system owned by a local government. It is regulated by the WY state drinking water program.
How many people does Larson'S Park serve?
Larson'S Park reports serving 45 people through 16 service connections in Platte County, Wyoming.
Where does Larson'S Park 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 Larson'S Park have any drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in January 2010. 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 Larson'S Park'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 6 violations for this system; 2 are health-based, and the most recent began in January 2010. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Larson'S Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Larson'S Park 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 Platte County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wheatland, Town of | Platte | 3,659 | Community | Groundwater |
| Arng-Camp Guernsey Cantonment | Platte | 2,000 | Non-transient non-community | Groundwater |
| Guernsey, Town of | Platte | 1,157 | Community | Groundwater |
| Wy Dot-Dwyer Junction Rest Area | Platte | 650 | Transient non-community | Groundwater |
| Basin Electric Power Co-Op | Platte | 310 | Non-transient non-community | Groundwater |
| Arng-Guernsey Training Camp | Platte | 302 | 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, “Larson'S Park, PWSID WY5601376, Wyoming”, https://aquacensus.com/water-systems/wyoming/larson-s-park-wy5601376 (data as of October 1, 2026).