Upwind Report

Glyphosate use in Williamson County, Illinois

Estimated farm glyphosate use in Williamson County, Illinois was 142 pounds per square mile of county land in 2019, higher than 66% of US counties.

Map of Williamson County, Illinois and nearby counties, coloring each county's cropland by estimated farm glyphosate use per square mile of county land in the 2019 high estimate. Darker colors mean more use.

2019 numbers

Per square mile of county land142lbTop 34% in the US
US
1,024th of 3,060
Illinois
90th of 102
Per square mile of cropland223lb

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 Williamson County against the US county median, with the source, to post or send.

Since 2000

Up from 63 in 2000 to 142 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
20006063
20016060
20027171
20038686
20046767
2005100100
2006104104
20079292
2008118118
2009137137
2010206206
2011179179
2012172172
2013164164
2014168168
2015215215
2016186186
2017149153
2018149149
2019142142
See Williamson 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.

USGS makes a low and a high estimate, which fill in use that farms didn't report in different ways.

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 Williamson County, Illinois 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.