Drinking water quality · 2023
What's in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA tap water
74 contaminants were measured in the South Tahoe Pud - Main — South Lake Tahoe, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 74
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- PFOA
- Service area
- CA
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based5 violations on record · most recent Apr 2008resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | 4 ng/LMaximumSystem-wide | 4 ng/LMCL | At or above the limit |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)ADONA, a newer-generation PFAS replacement compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS)9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid, a chlorinated PFAS compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LMaximumSystem-wide | None set | None detected |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)N-ethyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)N-methyl perfluorooctanesulfonamidoacetic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Nonafluoro-3,6-dioxaheptanoic acidNonafluoro-3,6-dioxaheptanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoro-3-methoxypropanoic acid (PFMPA)Perfluoro-3-methoxypropanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoro-4-methoxybutanoic acid (PFMBA)Perfluoro-4-methoxybutanoic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA)Perfluoro(2-ethoxyethane)sulfonic acid, a PFAS-related compound. | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorodecanoic acid (PFDA)Perfluorodecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorododecanoic acid (PFDoA)Perfluorododecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoroheptanesulfonic acid (PFHpS)Perfluoroheptanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | 10 ng/LMCL | None detected |
| Perfluorononanoic acidPerfluorononanoic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | 10 ng/LMCL | None detected |
| Perfluoropentanesulfonic acid (PFPeS)Perfluoropentanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorotetradecanoic acid (PFTeDA)Perfluorotetradecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluorotridecanoic acid (PFTrDA)Perfluorotridecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| Perfluoroundecanoic acid (PFUnA)Perfluoroundecanoic acid, a longer-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| PFBAPerfluorobutanoic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LMinimumSystem-wide | None set | None detected |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | Not detected ng/LMinimumSystem-wide | 4 ng/LMCL | None detected |
| Perfluoroheptanoic acidPerfluoroheptanoic acid, a PFAS 'forever chemical.' | 4 ng/LMaximumSystem-wide | None set | Detected — no federal limit |
| Perfluorohexanoic acidPerfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.' | 12.3 ng/LMaximumSystem-wide | None set | Detected — no federal limit |
| Perfluoropentanoic acidPerfluoropentanoic acid, a shorter-chain PFAS 'forever chemical.' | 14 ng/LMaximumSystem-wide | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 613 ug/L90th percentileAt the tap | 1300 ug/LAction level | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 4.1 ug/LAverageSystem-wide | None set | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 12 ug/LAverageSystem-wide | 2000 ug/LMCL | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | Not detected ug/LAverageSystem-wide | None set | None detected |
| Antimony | Not detected ug/LAverageSystem-wide | None set | None detected |
| Beryllium | Not detected ug/LAverageSystem-wide | None set | None detected |
| Cadmium | Not detected ug/LAverageSystem-wide | None set | None detected |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| MercuryA toxic metal from erosion of natural deposits and industrial runoff. | Not detected ug/LAverageSystem-wide | None set | None detected |
| NickelA metal from natural deposits and industrial discharge. | Not detected ug/LAverageSystem-wide | None set | None detected |
| SeleniumA trace element from natural deposits and industrial discharge. | Not detected ug/LAverageSystem-wide | None set | None detected |
| Thallium | Not detected ug/LAverageSystem-wide | None set | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 14.9 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| LithiumA naturally occurring element found in some groundwater. | 19.1 ug/LMaximumSystem-wide | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.45 mg/LAverageSystem-wide | 4 mg/LMCLG | Within the limit |
| Chromium | 0.6 ug/LAverageSystem-wide | None set | Within the limit |
| Diquat | Not detected mg/LAverageSystem-wide | None set | None detected |
| Endothall | Not detected mg/LAverageSystem-wide | None set | None detected |
| Glyphosate | Not detected mg/LAverageSystem-wide | None set | None detected |
| Styrene | Not detected ug/LAverageSystem-wide | None set | None detected |
VOCs & pesticides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Dichloromethane | 0.5 ug/LAverageSystem-wide | None set | Within the limit |
| 1,2,3-TCP | Not detected ug/LAverageSystem-wide | None set | None detected |
| DBCP1,2-dibromo-3-chloropropane — a banned soil fumigant pesticide. | Not detected mg/LAverageSystem-wide | None set | None detected |
| MTBE | Not detected ug/LAverageSystem-wide | None set | None detected |
| TetrachloroethyleneAn industrial solvent (PCE) used in dry cleaning and degreasing. | Not detected ug/LAverageSystem-wide | 5 ug/LMCL | None detected |
| Toluene | Not detected ug/LAverageSystem-wide | None set | Within the limit |
| XylenesA group of industrial solvents found in gasoline and paint. | Not detected ug/LAverageSystem-wide | None set | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 1.9 ug/LAverageSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | Not detected ug/LAverageSystem-wide | None set | None detected |
| PerchlorateA chemical used in rocket fuel and fireworks that can also form during disinfection. | Not detected ug/LAverageSystem-wide | None set | None detected |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.19 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 75 ug/LAverageSystem-wide | 4000 ug/LMCL | Within the limit |
| Asbestos | Not detected MFLAverageSystem-wide | 7 MFLMCL | None detected |
| Cyanide | Not detected ug/LAverageSystem-wide | None set | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected mg/LAverageSystem-wide | 1 mg/LMCL | None detected |
| BromideA naturally occurring salt found in source water. | 0.01 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| ChlorideA naturally occurring salt compound. | 12.2 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0.1 pCi/LAverageSystem-wide | 15 pCi/LMCL | Within the limit |
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | Not detected pCi/LAverageSystem-wide | 0.02 pCi/LMCLG | None detected |
| RadonA naturally occurring radioactive gas that can dissolve into groundwater. | 1455 pCi/LAverageSystem-wide | None set | Detected — no federal limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 4.5 pCi/LAverageSystem-wide | 0.4 pCi/LMCLG | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0 %AverageSystem-wide | None set | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %AverageSystem-wide | None set | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ColorA measure of visible tint in the water. | Not detectedAverageSystem-wide | None set | None detected |
| AlkalinityA measure of the water's capacity to neutralize acids. | 52.9 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 140AverageSystem-wide | None set | Detected — no federal limit |
| TemperatureThe measured temperature of the water sample. | 49AverageSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 107 mg/LAverageSystem-wide | None set | Detected — no federal limit |
People also ask about South Tahoe Pud - Main — South Lake Tahoe, Ca, CA's water
+Is South Tahoe Pud - Main — South Lake Tahoe, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the South Tahoe Pud - Main — South Lake Tahoe, Ca, CA water utility lists 1 contaminant at or above the federal limit: PFOA. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA tap water?
74 contaminants were measured in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA's 2023 Consumer Confidence Report, spanning pfas ("forever chemicals"), metals, and inorganic chemicals. 16 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA tap water?
One contaminant in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA's 2023 report sits at or above the federal limit: PFOA (1.0× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in South Tahoe Pud - Main — South Lake Tahoe, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is PFOA, at 1.0× the federal threshold. It belongs to the pfas ("forever chemicals") family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from South Tahoe Pud - Main — South Lake Tahoe, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is South Tahoe Pud - Main — South Lake Tahoe, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.