Union Reservoir
Alpine County, California193 acresView mapDirections
No nutrient or algae sampling on record from SWRCB for this lake.
- Limited data
Union Reservoir in Alpine County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 193 acres.
Union Reservoir is a 193-acre lake in Alpine County, California.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Union Reservoir is good for
From access and monitoring records, not editorial picks.
- Camping4 public campgrounds nearby
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Union Reservoir 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 Union Reservoir
These are the measurements SWRCB publishes for Union Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Union Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
193 acres
Shoreline
5.4 mi
No bathymetric survey has been published for Union Reservoir, so its depth is not documented here.
Recreation & Access
Public campgrounds near Union Reservoir
- Union East0.8 km
- Union West1.1 km
- Spicer3.2 km
- Spicer Group3.7 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Union Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Union Reservoir in Alpine 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 Union Reservoir
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Fishing Union Reservoir
Nearby Lakes in Alpine County
Frequently asked questions about Union Reservoir
Where is Union Reservoir?
- Union Reservoir is a lake in Alpine County, California. Its water-quality measurements are published by SWRCB and shown on this page as reported.
What is the water quality of Union Reservoir?
- Union Reservoir in Alpine County, California has water-quality measurements published by SWRCB, shown here as reported. Surface area: 193 acres.
Is Union Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Union Reservoir?
- Union Reservoir has 4 public campgrounds from USGS The National Map within 5 km, including Union East, Union West, Spicer, Spicer Group. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
Measurements for Union Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Public campgrounds from USGS The National Map Structures, within about 3 miles