Jahant
Sub-AVA · San Joaquin County · District 11, 12 — 90.28% of this appellation; also in Sacramento (9.72%)
27 CFR 9.199 · established 2006-07-17
Heat class IV · 1991-2020 normals
Climate normals in three numbers
, Apr 1 – Oct 31
14 GridMET cells cover this region
raw 4 km GridMET would say V
season rain, Apr 1 – Oct 31
26 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
San Joaquin County — not Jahant
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What's in the ground
6.4
pH, 1:1 water
14.9cm
, whole profile
102cm
to
Moderately well drained
, dominant condition
Distribution across 43 · mean ◆, median │, p10–p90 bar
Dominant
- 58.3%
- 13.4%
- 5.7%
- 5.5%
- 4.6%
43 map units · soil described over 99.1% of the region’s area · 2.2% is water, rock outcrop or other non-soil · 69% of the described area has a restrictive layer within the profile.
Sand, silt and clay, against every other appellation
Loam
45% sand · 36% silt · 20% clay
Sandier than 61% of California appellations and clayier than 31%. 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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Producers
A curated roster, not a census — only source-verified entries appear, 2772 published across the atlas.
Bearing acreage by variety
San Joaquin County · District 11, 12 — 90.28% of this appellation; also in Sacramento (9.72%)
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Price per ton
San Joaquin County · District 11, 12 — 90.28% of this appellation; also in Sacramento (9.72%)
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The appellation in federal law
The boundary, in the government’s own words (252 words)
(c) Boundary. The Jahant viticultural area is located in Sacramento and San Joaquin Counties, California, and is entirely with the Lodi viticultural area (27 CFR 9.107). The Jahant viticultural area boundary is as follows— (1) The beginning point is on the Lodi North map at the intersection of Peltier Road and the Mokelumne River, section 16 south boundary line, T4N, R6E. From the beginning point, proceed westerly (downstream) 6.7 miles along the Mokelumne River to its intersection with New Hope Road, about 0.7 mile north of the village of Thornton, T5N, R5E (Thornton Quadrangle); then (2) Proceed north then east for 3 miles on New Hope Road to its intersection with Kost Road, T5N, R6E (Lodi North Quadrangle); then (3) Proceed south then east for 4.1 miles on Kost Road to its intersection with Lincoln Way, section 35, T5N, R6E (Lodi North Quadrangle); then (4) Proceed southeast 0.15 mile on Lincoln Way to its intersection with Dry Creek, section 35, T5N, R6E (Lodi North Quadrangle); then (5) Proceed easterly (upstream) 7 miles along Dry Creek, crossing twice over and back at the southeast corner of the Galt map, and then crossing over the northwest corner of the Lockeford map, to Dry Creek's intersection with Elliott Road, section 26, T5N, R7E (Clay Quadrangle); then (6) Proceed south 4.5 miles on Elliott Road to its intersection with Peltier Road at the southeast corner of section 14, T4N, R7E (Lockeford Quadrangle); and (7) Proceed west 8.3 miles on Peltier Road, returning to the beginning point.