Public water system · WY5601137

Active

South Pass City Historical Site

At a glance

South Pass City Historical Site (PWSID WY5601137) is an active transient non-community water system in Fremont County, Wyoming. It reports serving 131 people through 12 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, 2 are health-based, and the most recent began in May 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

131

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDWY5601137

System typeTransient non-community water system

Activity statusActive

Population served131

Service connections12

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyWY state drinking water program

City servedSouth Pass City

StateWyoming

ZIP—

CountyFremont County

How does South Pass City Historical Site compare with other water systems in Fremont County?

By EPA's size categories, South Pass City Historical Site is a very small system (500 people or fewer). Fremont County has 61 active public water systems. Its population served is well below the county average of 433 people per system, and accounts for 0.5% of the 26,380 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 South Pass City Historical Site is roughly in line with 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 South Pass City Historical Site?

EPA lists South Pass City Historical Site 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. 37 of the 61 active systems in Fremont County (61%) are also privately owned.

Does South Pass City Historical Site have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2023. The violations listed here began between June 2016 and May 2023. By type: 9 monitoring, 2 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (12 of them). EPA lists 12 as resolved. 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
2023-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2021-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-05-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2018-03-27	Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-04-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2017-01-01	Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D	Revised Total Coliform Rulecode 8000	Yes	Resolved
2016-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-08-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2016-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved

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.

South Pass City Historical Site: frequently asked questions

Who runs South Pass City Historical Site?

South Pass City Historical Site (PWSID WY5601137) is a transient non-community water system privately owned. It is regulated by the WY state drinking water program.

How many people does South Pass City Historical Site serve?

South Pass City Historical Site reports serving 131 people through 12 service connections in Fremont County, Wyoming.

Where does South Pass City Historical Site 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 South Pass City Historical Site have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2023. 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 South Pass City Historical Site'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, 2 are health-based, and the most recent began in May 2023. For current results, consult EPA ECHO, or the WY state drinking water program.

Where can I find South Pass City Historical Site's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. South Pass City Historical Site 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 Fremont County

Water system	County	Population served	Type	Source
Riverton, City of	Fremont	10,330	Community	Surface water
Lander, City of	Fremont	7,615	Community	Surface water
Dubois, Town of	Fremont	1,822	Community	Groundwater
Shoshoni, Town of	Fremont	515	Community	Groundwater
Wy Dot-Sweetwater Rest Area	Fremont	500	Transient non-community	Groundwater
Hudson, Town of	Fremont	460	Community	Groundwater under influence of surface water

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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, “South Pass City Historical Site, PWSID WY5601137, Wyoming”, https://aquacensus.com/water-systems/wyoming/south-pass-city-historical-site-wy5601137 (data as of October 1, 2026).