Jordan Pond
Alameda County, CaliforniaView mapDirections
SWRCB publishes the water-quality measurements for Jordan Pond. Here is what has been measured.
- Limited data
Jordan Pond in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 2.5 ft visibility.
Jordan Pond is a lake in Alameda County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-07-28. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Jordan Pond 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 Jordan Pond
These are the measurements SWRCB publishes for Jordan Pond, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.5 ft of visibility. TSI 64.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.5ft | Measured, not scored 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) | 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. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about Jordan Pond
Where is Jordan Pond?
- Jordan Pond is a lake in Alameda County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Jordan Pond?
- Jordan Pond in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 2.5 ft visibility.
Is Jordan Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS2 samples · 2022
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.