Iowa Department of Public Safety Division of Criminal Investigation

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Statistics for Johnson County

Previous Six Months

Month

Year

Average Alcohol Level
(g/210L)

Number of Tests

December 2024 0.149 33
November 2024 0.138 83
October 2024 0.115 82
September 2024 0.130 77
August 2024 0.131 78
July 2024 0.136 66
 

Total:

419

Year to Date

Year

Average Alcohol Level
(g/210L)

Number of Tests

2024 0.131 867
2023 0.131 1,023
2022 0.125 1,241
2021 0.130 1,084
2020 0.119 678
2019 0.122 1,245
2018 0.119 1,318
2017 0.122 1,291
2016 0.119 1,425
2015 0.120 1,218
2014 0.119 1,160
2013 0.111 1,289
2012 0.121 1,290
2011 0.119 1,359
2010 0.117 386

DataMaster CDM Historical Data *

Year

Average Alcohol Level
(g/210L)

Number of Tests

2010 0.120 688
2009 0.127 1,058
2008 0.126 1,130
2007 0.128 1,222
2006 0.125 974
2005 0.128 1,408
2004 0.129 1,487
2003 0.130 883
2002 0.135 773
 

Total:

9,623

* The DataMaster CDM in use in Iowa from 1999 until 2011 was capable of limited data collection. This section of the website allows users to view the approximate number of tests and the average alcohol concentration of the subject for each county from 2002–2010.

This data is limited to the DataMaster CDM only. Please note, that the data may not be complete. The DataMaster CDM was capable of only holding approximately 175 tests at a time and there were situations that the memory was full and would no longer store tests until it was downloaded. Also, data may have been lost, never stored or cleared from memory prior to a download taking place.

The statistical data includes several subject tests that may have been performed by officers as "practice" and suspects that may have been impaired by substances other than alcohol therefore resulting in a zero breath alcohol result. Eliminating any test that was below 0.010 g/210 L, the statewide average over the past decade has been around 0.147 g/210 L.

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