Tule Lake
Modoc County, California3,395 acresView mapDirections
SWRCB publishes the water-quality measurements for Tule Lake. Here is what has been measured.
- Impaired · Other cause
- Limited data
Tule Lake in Modoc County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 210 µg/L. Chlorophyll-a (algae): 28.1 µg/L. Surface area: 3395 acres.
Tule Lake is a 3,395-acre lake in Modoc County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2018-09-24. Methodology: how these readings are compared.
What Tule Lake is good for
From access and monitoring records, not editorial picks.
- Big water3,395 acres
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Tule Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for other cause. Check local advisories before you swim.
Whether Tule 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 Tule Lake
These are the measurements SWRCB publishes for Tule 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 210 µg/L. Chlorophyll-a 28.1 µg/L.
| 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 | 210µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 28.1µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Tule Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
3,395 acres
No bathymetric survey has been published for Tule Lake, so its depth is not documented here.
Stays via Stay22
Stays near Tule Lake
Compare lakeside cabins, hotels, and vacation rentals near Tule Lake in Modoc 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Tule Lake are listed below.
Top-rated places to stay near Tule Lake
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Fishing Tule Lake
EPA Impairment Status
Tule Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit CAL1059102020020130221305 · Official waterbody report
Nearby Lakes in Modoc County
Frequently asked questions about Tule Lake
Where is Tule Lake?
- Tule Lake is a lake in Modoc County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Tule Lake?
- Tule Lake in Modoc County, California has water-quality measurements published by SWRCB, shown here as reported. Phosphorus: 210 µg/L. Chlorophyll-a (algae): 28.1 µg/L. Surface area: 3395 acres.
Is Tule Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Tule Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for other cause. Check local advisories before you swim.
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Where this data comes from
Measurements for Tule Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
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
Impairment status from EPA ATTAINS 303(d) database