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Review government records associated with Riverton, Wyoming.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Riverton, WY from EPA SDWIS.
Riverton, City of
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 10,330 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Nov 2023.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
2 PFAS sample results above EPA limits
Sample period: Nov 2023
UCMR5 results are sampled by public water system, not every household. Confirm your water provider before treating these as tap-water results for a specific address.
| Chemical | Concentration (µg/L) | EPA Limit (µg/L) | Sample date | Over Limit |
|---|---|---|---|---|
| PFHxS | 0.0370 | 0.0100 | 2023-11-06 | Yes |
| PFOS | 0.0070 | 0.0040 | 2023-11-06 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Riverton drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
No health-relevant impairment records shown among the assessment records in this report.
Reviewed: source records as of 2026
Reviewed: source records as of Q4 2025
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Fremont County
Assessment year: 2020
According to EPA, a cancer risk of 10-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 10 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
No EPA nonattainment designation records shown for this report.
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
56-013-0006 — Riverton, Wyoming
Annual mean: 10.8 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 3.0 Micrograms/cubic meter (LC)
Observation year: 2025
Lander Slam Site
Annual mean: 5.0 Micrograms/cubic meter (LC)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source query run Nov 2026
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHO1 site with active cleanup or investigation status
917 E Washington Ave, Riverton
Reported: Feb 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
Release reports
Reported: Dec 2021
Data from EPA UST Finder
Sites regulated by the Mine Safety and Health Administration, including mines, sand and gravel operations, and portable crushers. Status and type are from the MSHA Mine Data Retrieval System. Records with active/intermittent status dates older than 5 years are shown as older records rather than current active sites.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
Fremont County, WY
EPA Radon Zone Map (June 2024 release)
Fremont County is EPA Radon Zone 1 (highest potential). EPA defines Zone 1 counties as having predicted average indoor screening levels above 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
No FEMA flood-zone records shown for this report.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Fremont County, WyomingPop. 39,472
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 16,275 | 8,747 | 7,972 |
| Poor or Fair Health | 15.8% | 12.9% | 14.2% |
| Poor Physical Health Days | 3.8 | 3.5 | 3.3 |
| Poor Mental Health Days | 5.0 | 4.9 | 4.8 |
| Adult Smoking | 19.7% | 17.1% | 15.0% |
| Adult Obesity | 32.8% | 32.2% | 34.0% |
| Air Pollution - Particulate Matter | 6.6 | 3.6 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 9.6% | 7.6% | 9.6% |
| Life Expectancy | 71.2 | 76.8 | 77.6 |
EPA testing found PFAS in water samples from the City of Riverton. Results dated Nov 6, 2023 include PFHxS at 0.037 micrograms per liter and PFHxA at 0.028 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 2 violations for the City of Riverton.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Riverton.
The monitoring station at 56-013-0006, Riverton, Wyoming recorded an annual average of 10.8 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at 56-013-0006, Riverton, Wyoming recorded an annual average of 3 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Lander Slam site recorded an annual average of 5 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Riverton covers Fremont County. EPA places this area in Zone 1, with a predicted average indoor radon screening level above 4 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 1 brownfield site: Riverton Mercy House.
The county data for Riverton reports a life expectancy of 71.2 years in Fremont County, Wyoming.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Riverton reports 16,275 years of life lost to deaths before age 75 per 100,000 residents in Fremont County, Wyoming. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Riverton lists fine-particle pollution (PM2.5) at 6.6 micrograms per cubic meter in Fremont County, Wyoming.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.