Wishon Reservoir
Wishon Reservoir in Fresno County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 958 acres.
- Area
- 958 acres
Next lake in Fresno County
Swipe left or right on this bar to open the next or previous lake.
Why Wishon Reservoir has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Wishon Reservoir, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Wishon Reservoir is a 958-acre lake in Fresno County, California. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Wishon Reservoir water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Wishon Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Wishon Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Wishon Reservoir in Fresno 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 Wishon Reservoir
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 958 acres |
No bathymetric survey has been published for Wishon Reservoir, so its depth is not documented here.
Recreation & Access
- Wishon Village, Inc.Semi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Wishon Reservoir
Nearby Lakes in Fresno County
Frequently asked questions about Wishon Reservoir
Where is Wishon Reservoir?
- Wishon Reservoir is a lake in Fresno County, California. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Wishon Reservoir?
- Wishon Reservoir in Fresno County, California is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 958 acres.
Is Wishon Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Wishon Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Wishon Reservoir?
- Wishon Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Wishon Village, Inc..
Explore Wishon Reservoir across LakeQuality
More California Lake Rankings
Other Lakes in California
Where this data comes from
Measurements for Wishon Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory