Upwind Report

Glyphosate use in Yolo County, California

Reported farm glyphosate use in Yolo County, California was 173 pounds per square mile of county land in 2019, higher than 70% of US counties.

Map of Yolo 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 land173lbTop 30% in the US
US
893rd of 3,060
California
8th of 56
Per square mile of cropland263lb

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.

Share image

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

Since 2000

Up from 79 in 2000 to 173 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
20007979
20015050
20025050
20036868
20048686
20057575
2006140140
2007115115
20085050
20096161
20109797
2011119119
2012137137
2013144144
2014107107
2015171171
2016149149
2017157157
2018180180
2019173173
See Yolo 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 Yolo 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.