Upwind Report

Glyphosate use in Lake County, California

Reported farm glyphosate use in Lake County, California was 14 pounds per square mile of county land in 2019, lower than 63% of US counties.

Map of Lake County, California and nearby counties, coloring each county's cropland by estimated farm glyphosate use per square mile of county land in 2019 reported use. Darker colors mean more use.

2019 numbers

Per square mile of county land14lb
US
1,957th of 3,060
California
27th of 56
Per square mile of cropland377lb

Ranks are by use per square mile of county land, on the 2019 high estimate, among US counties with a value. Counties with the same value share a rank.

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A picture of Lake County against the US county median, with the source, to post or send.

Since 2000

Up from 8.3 in 2000 to 14 in 2019. Pounds per square mile of county land, high estimate.

Every year's numbers
Glyphosate per square mile of county land by year, in pounds
YearLowHigh
20008.38.3
20015.55.5
20029.39.3
20031212
20047.07.0
20059.19.1
20067.17.1
20077.37.3
20087.07.0
20094.44.4
20105.55.5
20118.38.3
20128.38.3
20131010
20148.78.7
20159.59.5
20169.69.6
20171010
20181414
20191414
See Lake County on the map

About these numbers

The main number is the county's estimated farm glyphosate use for the year divided by all of its land, water left out. A county with a little farmland can use a lot per square mile of cropland and still have far less in total than a county with more farmland, so the whole-county number is the one the map colors, ranks and compares.

These are county estimates, not records. They don't show which fields were sprayed or how much any one field got.

California's numbers are the state's own reported use, which USGS uses in place of an estimate, so the low and high numbers are the same.

Per square mile of cropland is the same total spread evenly over the county's cropland only, so it's higher than the whole-county number wherever only part of Lake County, California is farmland.

Numbers are in pounds per square mile. The source gives kilograms per square kilometer, and 1 kg per km² is about 5.7 pounds per square mile.

Source: Hengl & Brungard from USGS county estimates, 2000–2019 (CC BY 4.0). Land area: US Census Bureau, 2020.

This page shows estimated farm use only. It says nothing about health and is not medical advice.