At End of El-Em St. on Elem Indian Colony Lake
Lake County, CaliforniaView mapDirections
This is the name SWRCB records for this water. It can describe one sampling location rather than the water as a whole.
SWRCB publishes the water-quality measurements for At End of El-Em St. on Elem Indian Colony Lake. Here is what has been measured.
- Impaired · Biotoxins
- Limited data
At End of El-Em St. on Elem Indian Colony Lake in Lake County, California has water-quality measurements published by SWRCB, shown here as reported. Chlorophyll-a (algae): 16.3 µg/L.
At End of El-Em St. on Elem Indian Colony Lake is a lake in Lake County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-06-24. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. At End of El-Em St. on Elem Indian Colony Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, metals (other than mercury), oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
Whether At End of El-Em St. on Elem Indian Colony 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.
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Water quality measurements for At End of El-Em St. on Elem Indian Colony Lake
These are the measurements SWRCB publishes for At End of El-Em St. on Elem Indian Colony 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. Chlorophyll-a 16.3 µg/L. TSI 58.
| 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 | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | 16.3µg/L | Measured, not scored 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. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about At End of El-Em St. on Elem Indian Colony Lake
Answers come straight from the public measurements and survey records on this page.
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Fishing At End of El-Em St. on Elem Indian Colony Lake
EPA Impairment Status
At End of El-Em St. on Elem Indian Colony Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Drinking water, Aquatic life, Fish consumption, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit CAL5135200019980814115549 · Official waterbody report
Nearby Lakes in Lake County
Frequently asked questions about At End of El-Em St. on Elem Indian Colony Lake
Where is At End of El-Em St. on Elem Indian Colony Lake?
- At End of El-Em St. on Elem Indian Colony Lake is in Lake County, California. This is the name SWRCB records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of At End of El-Em St. on Elem Indian Colony Lake?
- At End of El-Em St. on Elem Indian Colony Lake in Lake County, California has water-quality measurements published by SWRCB, shown here as reported. Chlorophyll-a (algae): 16.3 µg/L.
Is At End of El-Em St. on Elem Indian Colony Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. At End of El-Em St. on Elem Indian Colony Lake is listed impaired under Clean Water Act §303(d) (IR 5) for biotoxins, mercury, metals (other than mercury), oxygen depletion (low DO), pH / acidity. Check local advisories before you swim.
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Where this data comes from
126 measurements from 1 monitoring station, 2021–2026. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Big Valley Band of Pomo Indians of the Big Valley Rancheria, California (Tribal)
CA_BVR126 samples · 2021–2026
Analytical methods
- Chlorophyll a
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
Impairment status from EPA ATTAINS 303(d) database