Sherman Lake
Sherman Lake in Sacramento County, California has a water quality grade of A (Excellent). Chlorophyll-a (algae): 3.2 µg/L.
- Type
- Mesotrophic
- Public access
- Yes
Sherman Lake is a mesotrophic lake in Sacramento County, California. Water quality is graded A based on 1 sampling years through 2021. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 1 other monitored lakes in Sacramento County, Sherman Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-09-07. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
No clarity data. Chlorophyll-a: 3.2 µg/L. Trophic State Index: 42.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 3.2 µg/L | Good |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Sherman Lake
Compare lakeside cabins, hotels, and vacation rentals near Sherman Lake in Sacramento 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 Sherman Lake
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Recreation & Access
- Lower Sherman Island Fishing AccessPublic
- Sherman Lake MarinaPublic
Named access points from the USGS National Boat Ramps inventory, snapped within 5 km. More lakes with boat ramps
Fishing Sherman Lake
County Ranking
Ranked #1 of 2 lakes in Sacramento County
Nearby Lakes in Sacramento County
Frequently asked questions about Sherman Lake
Where is Sherman Lake?
- Sherman Lake is a lake in Sacramento County, California. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Sherman Lake?
- Sherman Lake in Sacramento County, California has a water quality grade of A (Excellent). Chlorophyll-a (algae): 3.2 µg/L.
Is Sherman Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Sherman Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 3.2 µg/L. Always check local health department advisories before swimming.
Are there boat ramps on Sherman Lake?
- Sherman Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Lower Sherman Island Fishing Access, Sherman Lake Marina. Public access is listed as yes.
Explore Sherman Lake across LakeGrade
More California Lake Rankings
Other Grade A Lakes in California
Mesotrophic Lakes in California
Where this data comes from
12 measurements from 3 monitoring stations, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- USGS California Water Science Center
USGS-CA12 samples · 2020–2021
Analytical methods
- Plant pigments, sonication & 445
Monitoring station identifiers (3)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory