Suisun Valley
AVA · Solano County · District 5
27 CFR 9.45 · established 1982-11-24
Heat class IV · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
10 GridMET cells cover this region
raw 4 km GridMET would say V
season rain, Apr 1 – Oct 31
31 mm of it in the , Sep 1 – Oct 31
Warm and cool vintages since 1980
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Rain across the season, and at harvest
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The boundary
Hovering a shaded region names it; a click opens its page.
Measured vineyard area
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Drought categories, year by year
Solano County — not Suisun Valley
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What's in the ground
6.7
pH, 1:1 water
21.4cm
, whole profile
138cm
to
Well drained
, dominant condition
Distribution across 49 · mean ◆, median │, p10–p90 bar
Dominant
- 31.1%
- 24.4%
- 11.5%
- 6.8%
- 5.7%
49 map units · soil described over 99.0% of the region’s area · 1.1% is water, rock outcrop or other non-soil · 43% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Clay loam
22% sand · 47% silt · 31% clay
Sandier than 1% of California appellations and clayier than 92%. Each grey point is one appellation’s topsoil; appellations nest, so this is a distribution of places rather than of land.
Plus 4% rock fragments by volume, which the triangle does not describe — the three fractions are of the fine-earth material only.
Elevation, slope and aspect
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Bearing acreage by variety
Solano County · District 5
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Price per ton
Solano County · District 5
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The appellation in federal law
The boundary, in the government’s own words (156 words)
(c) Boundaries. The Suisun Valley viticultural area is located in Solano County, California. The beginning point is the intersection of the Southern Pacific Railroad track with range line “R3W/R2W” in the town of Cordelia, located on U.S.G.S. map “Cordelia Quadrangle.” (1) From the beginning point, the boundary runs northeast in a straight line to the intersection of Ledgewood Creek with township line “T5N/T4N”; (2) Thence in a straight line in a northeast direction to Bench Mark (BM) 19 located in the town of Fairfield; (3) Thence in a straight line due north to Soda Springs Creek; (4) Thence in a straight line in a northwest direction to the extreme southeast corner of Napa County located just south of Section 34, Township 6 North, Range 2 West; (5) Thence due west along the Napa/Solano County border to where it intersects with range line “R3W/R2W”; (6) Thence due south along range line “R3W/R2W” to the point of beginning.