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Review government records associated with South Lake Tahoe, California.
Toxin Scout is in beta. Please verify important findings with the linked sources.
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Preparing South Lake Tahoe 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 South Lake Tahoe, CA from EPA SDWIS.
South Tahoe Pud - Main
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 100,000 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 Sep 2023 to Mar 2024.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
4 PFAS sample results above EPA limits
Sample period: Nov 2023 to Mar 2024
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 |
|---|---|---|---|---|
| PFOA | 0.0061 | 0.0040 | 2024-03-12 | Yes |
| PFOS | 0.0052 | 0.0040 | 2024-03-12 | Yes |
| PFOA | 0.0051 | 0.0040 | 2023-11-20 | Yes |
| PFOS | 0.0047 | 0.0040 | 2023-11-20 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not South Lake Tahoe 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.
Trout Creek
Reported: Nov 2026
Health-relevant causes: Metals (other Than Mercury)
Affected uses: Drinkingwater, Ecological, Recreation
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.
El Dorado County
Assessment year: 2020
According to EPA, a cancer risk of 40-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 40 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
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Lake Tahoe South Shore Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate <= 12.7ppm
Original designation: Nov 1990
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Carson City Armory
Annual mean: 0.043 Parts per million
Observation year: 2025
Annual mean: 4.7 Micrograms/cubic meter (LC)
Observation year: 2025
Incline — Incline Village-Crystal Bay, Nevada
Annual mean: 0.047 Parts per million
EPA primary exceedance count: 1 (Ozone 8-hour 2015)
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
Air Violations
Last inspected: Dec 2025
Data from EPA ECHO
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
3 sites with active cleanup or investigation
1110 RUFUS ALLEN BOULEVARD, SOUTH LAKE TAHOE
1.0 miles away · EL DORADO County
Reported: Nov 2026
2031 WEST WAY, SOUTH LAKE TAHOE
2.2 miles away · EL DORADO County
Reported: Nov 2026
2709 HIGHWAY 50, SOUTH LAKE TAHOE
0.1 miles away · EL DORADO County
Reported: Nov 2026
Data from EPA ECHO
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
No MSHA mine or extraction site records shown for this report.
El Dorado County, CA
EPA Radon Zone Map (June 2024 release)
El Dorado 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.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain) with base flood elevation.
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.
El Dorado County, CaliforniaPop. 192,646
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 | 5,834 | 6,373 | 7,972 |
| Poor or Fair Health | 12.6% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.2 | 3.1 | 3.3 |
| Poor Mental Health Days | 5.4 | 4.7 | 4.8 |
| Adult Smoking | 11.2% | 8.8% | 15.0% |
| Adult Obesity | 28.1% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 7.0 | 7.1 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 7.7% | 10.8% | 9.6% |
| Life Expectancy | 81.1 | 79.9 | 77.6 |
EPA testing found PFAS in water samples from South Tahoe PUD-Main. Results dated Sep 27, 2023 to Mar 12, 2024 include PFPeA at 0.012 to 0.0224 micrograms per liter and PFHxA at 0.0093 to 0.0163 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 South Tahoe PUD-Main.
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 South Lake Tahoe.
The monitoring station at Carson City Armory recorded an annual average of 0.043 Parts per million for ozone in 2025.
The monitoring station at Carson City Armory recorded an annual average of 4.7 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Incline, Incline Village-Crystal Bay, Nevada recorded an annual average of 0.047 Parts per million for ozone in 2025.
The radon data for South Lake Tahoe covers El Dorado 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 South Lake Tahoe reports a life expectancy of 81.1 years in El Dorado County, California.
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 South Lake Tahoe reports 5,834 years of life lost to deaths before age 75 per 100,000 residents in El Dorado County, California. 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 South Lake Tahoe lists fine-particle pollution (PM2.5) at 7.0 micrograms per cubic meter in El Dorado County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.