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Review government records associated with Onalaska, Wisconsin.
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Preparing Onalaska environmental records...
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 Onalaska, WI from EPA SDWIS.
Onalaska Waterworks
PFAS detected below the official threshold used by this report.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 18,000 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 Jan 2023 to Jul 2023.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Onalaska drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Smith Valley Creek-La Crosse River
Reported: Nov 2026
Health-relevant causes: Metals (other Than Mercury)
Affected uses: Ecological
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Data from EPA ECHO
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.
La Crosse County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 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.
Lacrosse - Dot Building — La Crosse, Wisconsin
Annual mean: 0.040 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Fiberpro Inc
Reported: 2024
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 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
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Reviewed: reporting year 2024
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.
More MSHA records matched the search than this preview shows.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
La Crosse County, WI
EPA Radon Zone Map (June 2024 release)
La Crosse County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 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.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
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.
La Crosse County, WisconsinPop. 120,294
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 | 6,284 | 7,082 | 7,972 |
| Poor or Fair Health | 12.0% | 12.7% | 14.2% |
| Poor Physical Health Days | 3.1 | 3.1 | 3.3 |
| Poor Mental Health Days | 4.7 | 4.8 | 4.8 |
| Adult Smoking | 14.7% | 13.8% | 15.0% |
| Adult Obesity | 35.0% | 33.5% | 34.0% |
| Air Pollution - Particulate Matter | 7.6 | 7.8 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 7.8% | 7.9% | 9.6% |
| Life Expectancy | 79.1 | 78.2 | 77.6 |
EPA testing found PFAS in water samples from Onalaska Waterworks. Results dated Jan 10, 2023 to Jul 11, 2023 include PFBS at 0.0033 to 0.0042 micrograms per liter.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for Onalaska Waterworks.
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 Onalaska.
The monitoring station at Lacrosse-Dot Building, La Crosse, Wisconsin recorded an annual average of 0.04 Parts per million for ozone in 2025.
The radon data for Onalaska covers La Crosse County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Onalaska reports a life expectancy of 79.1 years in La Crosse County, Wisconsin.
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 Onalaska reports 6,284 years of life lost to deaths before age 75 per 100,000 residents in La Crosse County, Wisconsin. 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 Onalaska lists fine-particle pollution (PM2.5) at 7.6 micrograms per cubic meter in La Crosse County, Wisconsin.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.