# Tahoe City Pud - Main — Tahoe City, Ca, CA — Drinking Water Quality (2023)

> Contaminant levels for the Tahoe City Pud - Main — Tahoe City, Ca, CA public water system from its 2023 Consumer Confidence Report, compared to federal limits.

- Page: https://www.thewatermap.com/water/ca/tahoe-city-pud-main-tahoe-city-ca/2023
- JSON API: https://www.thewatermap.com/api/water/ca/tahoe-city-pud-main-tahoe-city-ca/2023
- Source: the utility's annual Consumer Confidence Report (CCR)
- Verification: transcribed by a model, cross-checked by a second model, approved before publishing
- Reporting year: 2023
- Contaminants measured: 21
- Contaminants with a federal limit: 4
- Contaminants at or above the federal limit: 0
- Part of The Water Map — https://www.thewatermap.com

## Contaminants measured

| Contaminant | Category | Measured level | Sampling context | Federal limit | Status |
|---|---|---|---|---|---|
| HAA5 | Disinfection byproducts | Not detected ug/L (Reported level) | Highlands Well #2 | No federal limit | None detected |
| TTHM | Disinfection byproducts | Not detected ug/L (Reported level) | T.C. Well #2 | No federal limit | None detected |
| Chloride | Inorganic chemicals | 0.6 mg/L (Reported level) | Highlands Well #2 | No federal limit | Detected — no federal limit |
| Sulfate | Inorganic chemicals | 3.6 mg/L (Reported level) | T.C. Well #3 | No federal limit | Detected — no federal limit |
| Arsenic | Metals | 4.1 ug/L (Reported level) | Highlands Well #1 | No federal limit | Within the limit |
| Calcium | Metals | 16.7 mg/L (Reported level) | Tahoe Tavern Well | No federal limit | Detected — no federal limit |
| Copper | Metals | 0.79 mg/L (90th percentile) | At the tap | 1.3 mg/L (Action level) | Within the limit |
| Lead | Metals | 7.8 ug/L (90th percentile) | At the tap | No federal limit | Within the limit |
| Nickel | Metals | 21 ug/L (Reported level) | T.C. Well #3 | No federal limit | Detected — no federal limit |
| Sodium | Metals | 14.6 mg/L (Reported level) | Highlands Well #1 | No federal limit | Detected — no federal limit |
| Zinc | Metals | Not detected mg/L (Reported level) | Tahoe Tavern Well | No federal limit | None detected |
| Total Coliform | Microbial | 147 (Reported level) | Highlands Well #1 | No federal limit | Detected — no federal limit |
| Chlorine Total | Other | 0.33–0.44 mg/L (Reported level) | Highlands Well #2 | 4 mg/L (MCL) | Within the limit |
| Alkalinity | Physical & aggregate | 93.7 mg/L (Reported level) | Tahoe Tavern Well | No federal limit | Detected — no federal limit |
| Hardness | Physical & aggregate | 74 mg/L (Reported level) | Tahoe Tavern Well | No federal limit | Detected — no federal limit |
| Odor | Physical & aggregate | 2 (Reported level) | T.C. Well #3 | No federal limit | Detected — no federal limit |
| Specific Conductance | Physical & aggregate | 217 (Reported level) | Tahoe Tavern Well | No federal limit | Detected — no federal limit |
| Total Dissolved Solids | Physical & aggregate | 125 mg/L (Reported level) | Tahoe Tavern Well | No federal limit | Detected — no federal limit |
| Turbidity | Physical & aggregate | 0.45 NTU (Reported level) | Highlands Well #2 | 1 NTU (MCL) | Within the limit |
| Gross Alpha | Radionuclides | 4.25 pCi/L (Reported level) | Highlands Well #1 | 15 pCi/L (MCL) | Within the limit |
| Radon | Radionuclides | 1230 pCi/L (Reported level) | T.C. Well #3 | No federal limit | Detected — no federal limit |

## What these contaminants are

- **HAA5** — Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. Long-term exposure above the federal limit is associated with an increased cancer risk.
- **TTHM** — Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.
- **Chloride** — A naturally occurring salt compound. Regulated only as a secondary (cosmetic) standard; high levels cause a salty taste and can corrode pipes.
- **Sulfate** — A naturally occurring mineral from rock and soil. No health-based federal limit; high levels can have a laxative effect and a bitter taste.
- **Arsenic** — A naturally occurring element that also enters water from industry and agriculture. A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.
- **Calcium** — A naturally occurring mineral that contributes to water hardness. Not federally regulated for health; affects scaling and taste.
- **Copper** — A metal that enters water from corroding household plumbing. Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.
- **Lead** — A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.
- **Nickel** — A metal from natural deposits and industrial discharge. Long-term exposure can cause skin and other effects; monitored under EPA rules.
- **Sodium** — A naturally occurring salt component. Not federally regulated for health; relevant for people on sodium-restricted diets.
- **Zinc** — A naturally occurring metal that can also enter water from corroding pipes. Regulated only as a secondary (cosmetic) standard; high levels cause a metallic taste.
- **Total Coliform** — A group of bacteria used as an indicator of overall water-system sanitation. Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.
- **Alkalinity** — A measure of the water's capacity to neutralize acids. Not federally regulated for health; relevant to corrosion control and treatment.
- **Hardness** — A measure of dissolved calcium and magnesium minerals. Not federally regulated for health; affects scaling, soap use, and taste.
- **Odor** — A measure of detectable smell in the water. Regulated only as a secondary (cosmetic) standard.
- **Specific Conductance** — A measure of how well water conducts electricity, which tracks dissolved mineral content. Not federally regulated for health; used as a proxy for total dissolved solids.
- **Total Dissolved Solids** — Total dissolved solids — the combined content of all dissolved minerals and salts. Regulated only as a secondary (cosmetic) standard; high levels affect taste and hardness.
- **Turbidity** — A measure of cloudiness from suspended particles in the water. High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.
- **Gross Alpha** — Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances. Long-term exposure above the federal limit increases cancer risk.
- **Radon** — A naturally occurring radioactive gas that can dissolve into groundwater. No enforceable federal limit in drinking water yet; inhalation of released radon raises lung-cancer risk.

## How to read this

- A water-quality report covers an entire service area, not a single address.
- 'Federal limit' is the EPA standard (MCL, action level, treatment technique, etc.) that the measured level is compared against.
- 'At or above the federal limit' means the utility's own reported figure met or exceeded that standard.

_Figures are the utility's own published numbers. Generated 2026-06-04 from thewatermap.com._