Lake Chabot
Alameda County, California340 acresView mapDirections
SWRCB publishes the water-quality measurements for Lake Chabot. Here is what has been measured.
- Impaired · Mercury
- Public access
- Limited data
Lake Chabot in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 5.3 ft visibility. Surface area: 340 acres.
Lake Chabot is a 340-acre lake in Alameda County, California. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-07-28. Methodology: how these readings are compared.
What Lake Chabot is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Lake Chabot is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pesticides, pCBs. Check local advisories before you swim.
Whether Lake Chabot 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 Lake Chabot
These are the measurements SWRCB publishes for Lake Chabot, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5.3 ft. TSI 53.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.3ft | 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. | 53 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Chabot
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
340 acres
Public access
Yes
Listed by SWRCB
No bathymetric survey has been published for Lake Chabot, so its depth is not documented here.
Recreation & Access
- Lake Chabot MarinaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Lake Chabot
Compare lakeside cabins, hotels, and vacation rentals near Lake Chabot in Alameda 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 Lake Chabot
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Fishing Lake Chabot
Reservoir Info (USACE NID)
Lake Chabot is a man-made reservoir impounded by the Chabot (completed 1892), built primarily for water supply on the San Leandro Creek; earth-type dam, 142 ft tall and 450 ft long.
- Surface area
- 340 ac
- Max storage
- 10,281 ac-ft
- Drainage area
- 41.4 sq mi
- Hazard class
- High
- Owner
- East Bay Municipal Utility District
Source: USACE National Inventory of Dams, NID ID CA00165 · Operator website
EPA Impairment Status
Lake Chabot 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: Fish consumption, Other.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit CAL2042003020060515154933 · Official waterbody report
Nearby Lakes in Alameda County
Frequently asked questions about Lake Chabot
Where is Lake Chabot?
- Lake Chabot 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 Lake Chabot?
- Lake Chabot in Alameda County, California has water-quality measurements published by SWRCB, shown here as reported. Water clarity: 5.3 ft visibility. Surface area: 340 acres.
Is Lake Chabot safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Chabot is listed impaired under Clean Water Act §303(d) (IR 5) for mercury, pesticides, pCBs. Check local advisories before you swim.
Are there boat ramps on Lake Chabot?
- Lake Chabot has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Chabot Marina. Public access is listed as yes.
Can I fish at Lake Chabot?
- Lake Chabot has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by California's fish and wildlife agency, so check its current regulations before you go.
Explore Lake Chabot across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS3 samples · 2021–2022
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory