Red Lake
Tuolumne County, CaliforniaView mapDirections
SWRCB publishes the water-quality measurements for Red Lake. Here is what has been measured.
- Limited data
Red Lake in Tuolumne County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 75 µg/L.
Red Lake is a lake in Tuolumne County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-09-21. Methodology: how these readings are compared.
What Red Lake is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Red Lake is safe to swim in today is a call for the California State Water Resources Control Board and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Red Lake
These are the measurements SWRCB publishes for Red Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 75 µg/L. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 75µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Red Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
Public campgrounds near Red Lake
- Kerrick Corrals1.3 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Red Lake
Compare lakeside cabins, hotels, and vacation rentals near Red Lake in Tuolumne County, California — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Red Lake
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Fishing Red Lake
Nearby Lakes in Tuolumne County
Frequently asked questions about Red Lake
Where is Red Lake?
- Red Lake is a lake in Tuolumne County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Red Lake?
- Red Lake in Tuolumne County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 75 µg/L.
Is Red Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Red Lake?
- Red Lake has 1 public campground from USGS The National Map within 5 km, including Kerrick Corrals. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Red Lake across LakeQuality
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Eutrophic Lakes in California
Where this data comes from
6 measurements from 1 monitoring station, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- California State Water Resources Control Board
CEDEN6 samples · 2020–2021
Analytical methods
- EPA 365.3
- SM 4500-P BE
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles