EtO Monitoring Results

Recent Updates

August 14, 2019 Update: Final air monitoring results received; corrections to wind rose diagrams

The final set of air monitoring results have been received and are posted below. The new results include samples collected between June 24 and July 4, 2019. Please note that all maps have been revised to include adjusted wind rose diagrams that provide a more detailed gradient for wind speed, more distinctive coloring to better distinguish wind speeds, and corrected wind speed data. 

PRESS RELEASE: Final Ethylene Oxide Air Monitoring Results Received

July 24, 2019 Update: Additional air monitoring results received

Both Medline and Vantage have conducted independent air monitoring during the month of June, some of which was done at sites also being monitored by the Health Department, the Village of Gurnee and the City of Waukegan. Results can be viewed here:

Medline air monitoring results

Vantage air monitoring results 

July 22, 2019 Update: Additional air monitoring results received

The Health Department has received additional air monitoring results from samples collected on five separate days from June 14 to June 22, 2019 in Lake County.

June 21, 2019 Update: Initial air monitoring results received

The Health Department has received initial air monitoring results from samples collected on three separate days from June 6 to June 10, 2019 in Lake County. This initial data represents only three days of sampling, so conclusions about potential impacts to health cannot yet be made. The Health Department is sharing all results with the Village of Gurnee, City of Waukegan, U.S. Environmental Protection Agency (EPA) and Illinois Environmental Protection Agency (IEPA) as the data becomes available. Updates will be provided to the public on this web page.

Please note that on certain days, not all monitoring locations are sampled. These days were randomly selected during the 30-day period. Samples collected on these days are in addition to the samples collected on the regularly scheduled days. On these random days, four monitoring sites are being sampled.

PRESS RELEASE: Initial Ethylene Oxide Air Monitoring Results Received

Lake County Air Monitoring Results

Updated August 14, 2019

Notes on sample results table:

  1. ND (No detect) = EtO was not detected at a level above the method detection limit of approximately 0.045 μg/m3
  2. Invalid = The test could not be conducted due to a failure of the sampling device
  3. <0.072 = EtO was not detected at a level above the method detection limit of 0.072 μg/m3
Site #LocationSample DatesMeasured Air Concentration
μg/m3ppb
R1O'Plaine Rd & Russell Ave, GurneeJune 6 – 7, 20190.120.068
R27000 Washington Street, GurneeJune 6 – 7, 20190.150.082
V12000 Belle Plaine Ave, GurneeJune 6 – 7, 20190.210.12
V2SE corner Northwestern and Keith, GurneeJune 6 – 7, 20190.140.076
V33886 Morrison Drive, GurneeJune 6 – 7, 20190.270.15
V41200 Estes Drive, GurneeJune 6 – 7, 20190.190.11
M1SE corner of N. Palmieri and Staben, WaukeganJune 6 – 7, 20190.210.11
M23106 Belvidere Road, WaukeganJune 6 – 7, 20190.120.068
M3Pulaski Road and S. Shields Drive, WaukeganJune 6 – 7, 20196.83.8
M4FP access west of Green Bay Road, WaukeganJune 6 – 7, 20190.150.081
V12000 Belle Plaine Ave, GurneeJune 7 – 8, 20190.110.062
V33886 Morrison Drive, GurneeJune 7 – 8, 20190.610.34
M1SE corner of N. Palmieri and Staben, WaukeganJune 7 – 8, 20190.180.1
M3Pulaski Road and S. Shields Drive, WaukeganJune 7 – 8, 2019105.6
R1O'Plaine Rd & Russell Ave, GurneeJune 9 – 10, 20190.130.07
R27000 Washington Street, GurneeJune 9 – 10, 20190.110.062
V12000 Belle Plaine Ave, GurneeJune 9 – 10, 20190.170.093
V2SE corner Northwestern and Keith, GurneeJune 9 – 10, 20190.140.079
V33886 Morrison Drive, GurneeJune 9 – 10, 20190.120.068
V41200 Estes Drive, GurneeJune 9 – 10, 20190.130.07
M1SE corner of N. Palmieri and Staben, WaukeganJune 9 – 10, 20190.210.12
M23106 Belvidere Road, WaukeganJune 9 – 10, 20190.150.081
M3Pulaski Road and S. Shields Drive, WaukeganJune 9 – 10, 20192.41.3
M4FP access west of Green Bay Road, WaukeganJune 9 – 10, 20190.280.16
R1O'Plaine Rd & Russell Ave, GurneeJune 12 – 13, 20190.0950.053
R27000 Washington Street, GurneeJune 12 – 13, 20190.120.065
V12000 Belle Plaine Ave, GurneeJune 12 – 13, 20190.190.11
V2SE corner Northwestern and Keith, GurneeJune 12 – 13, 20190.190.11
V33886 Morrison Drive, GurneeJune 12 – 13, 20190.240.13
V41200 Estes Drive, GurneeJune 12 – 13, 20190.320.18
M1SE corner of N. Palmieri and Staben, WaukeganJune 12 – 13, 20190.600.33
M23106 Belvidere Road, WaukeganJune 12 – 13, 20190.310.17
M3Pulaski Road and S. Shields Drive, WaukeganJune 12 – 13, 20190.430.24
M4FP access west of Green Bay Road, WaukeganJune 12 – 13, 20190.410.23
V12000 Belle Plaine Ave, GurneeJune 14 – 15, 2019NDND
V33886 Morrison Drive, GurneeJune 14 – 15, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 14 – 15, 20194.312.39
M3Pulaski Road and S. Shields Drive, WaukeganJune 14 – 15, 2019NDND
R1O'Plaine Rd & Russell Ave, GurneeJune 15 – 16, 2019NDND
R27000 Washington Street, GurneeJune 15 – 16, 20190.160.0896
V12000 Belle Plaine Ave, GurneeJune 15 – 16, 2019NDND
V2SE corner Northwestern and Keith, GurneeJune 15 – 16, 2019NDND
V33886 Morrison Drive, GurneeJune 15 – 16, 20191.100.608
V41200 Estes Drive, GurneeJune 15 – 16, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 15 – 16, 20192.061.14
M1SE corner of N. Palmieri and Staben, WaukeganJune 15 – 16, 20190.140.077
M23106 Belvidere Road, WaukeganJune 15 – 16, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJune 15 – 16, 20191.240.686
M4FP access west of Green Bay Road, WaukeganJune 15 – 16, 2019InvalidInvalid
V12000 Belle Plaine Ave, GurneeJune 17 – 18, 2019NDND
V33886 Morrison Drive, GurneeJune 17 – 18, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 17 – 18, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJune 17 – 18, 20195.382.98
M3Pulaski Road and S. Shields Drive, WaukeganJune 17 – 18, 20195.83.2
R1O'Plaine Rd & Russell Ave, GurneeJune 18 – 19, 2019NDND
R27000 Washington Street, GurneeJune 18 – 19, 20191.280.708
V12000 Belle Plaine Ave, GurneeJune 18 – 19, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 18 – 19, 20190.230.13
V2SE corner Northwestern and Keith, GurneeJune 18 – 19, 2019NDND
V33886 Morrison Drive, GurneeJune 18 – 19, 2019NDND
V41200 Estes Drive, GurneeJune 18 – 19, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 18 – 19, 2019NDND
M23106 Belvidere Road, WaukeganJune 18 – 19, 20190.240.135
M3Pulaski Road and S. Shields Drive, WaukeganJune 18 – 19, 20193.161.75
M4FP access west of Green Bay Road, WaukeganJune 18 – 19, 2019NDND
R1O'Plaine Rd & Russell Ave, GurneeJune 21 – 22, 20190.50.277
R27000 Washington Street, GurneeJune 21 – 22, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 21 – 22, 20190.890.495
V2SE corner Northwestern and Keith, GurneeJune 21 – 22, 2019NDND
V33886 Morrison Drive, GurneeJune 21 – 22, 2019NDND
V41200 Estes Drive, GurneeJune 21 – 22, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 21 – 22, 2019NDND
M23106 Belvidere Road, WaukeganJune 21 – 22, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJune 21 – 22, 20195.563.08
M4FP access west of Green Bay Road, WaukeganJune 21 – 22, 2019NDND
M4FP access west of Green Bay Road, WaukeganJune 21 – 22, 2019<0.072<0.040
R1O'Plaine Rd & Russell Ave, GurneeJune 24 – 25, 2019NDND
R27000 Washington Street, GurneeJune 24 – 25, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 24 – 25, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 24 – 25, 20190.130.075
V2SE corner Northwestern and Keith, GurneeJune 24 – 25, 2019NDND
V33886 Morrison Drive, GurneeJune 24 – 25, 20190.280.153
V41200 Estes Drive, GurneeJune 24 – 25, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJune 24 – 25, 20190.870.484
M23106 Belvidere Road, WaukeganJune 24 – 25, 2019NDND
M23106 Belvidere Road, WaukeganJune 24 – 25, 20190.290.16
M3Pulaski Road and S. Shields Drive, WaukeganJune 24 – 25, 20190.770.427
M4FP access west of Green Bay Road, WaukeganJune 24 – 25, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 26 – 27, 20190.180.102
V33886 Morrison Drive, GurneeJune 26 – 27, 20190.270.147
V33886 Morrison Drive, GurneeJune 26 – 27, 20190.200.11
M1SE corner of N. Palmieri and Staben, WaukeganJune 26 – 27, 20190.730.406
M3Pulaski Road and S. Shields Drive, WaukeganJune 26 – 27, 20191.270.706
R1O'Plaine Rd & Russell Ave, GurneeJune 27 – 28, 2019NDND
R27000 Washington Street, GurneeJune 27 – 28, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 27 – 28, 20190.230.126
V2SE corner Northwestern and Keith, GurneeJune 27 – 28, 2019NDND
V33886 Morrison Drive, GurneeJune 27 – 28, 2019NDND
V41200 Estes Drive, GurneeJune 27 – 28, 2019InvalidInvalid
M1SE corner of N. Palmieri and Staben, WaukeganJune 27 – 28, 2019NDND
M23106 Belvidere Road, WaukeganJune 27 – 28, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJune 27 – 28, 20191.230.683
M4FP access west of Green Bay Road, WaukeganJune 27 – 28, 2019NDND
R1O'Plaine Rd & Russell Ave, GurneeJune 30 – July 1, 2019NDND
R27000 Washington Street, GurneeJune 30 – July 1, 2019NDND
V12000 Belle Plaine Ave, GurneeJune 30 – July 1, 20190.150.0853
V2SE corner Northwestern and Keith, GurneeJune 30 – July 1, 20190.580.321
V33886 Morrison Drive, GurneeJune 30 – July 1, 20190.380.209
V41200 Estes Drive, GurneeJune 30 – July 1, 20190.220.119
V41200 Estes Drive, GurneeJune 30 – July 1, 20193.62.0
M1SE corner of N. Palmieri and Staben, WaukeganJune 30 – July 1, 2019NDND
M23106 Belvidere Road, WaukeganJune 30 – July 1, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJune 30 – July 1, 20191.270.704
M4FP access west of Green Bay Road, WaukeganJune 30 – July 1, 20190.620.341
R1O'Plaine Rd & Russell Ave, GurneeJuly 3 – 4, 20190.580.322
R27000 Washington Street, GurneeJuly 3 – 4, 2019NDND
V12000 Belle Plaine Ave, GurneeJuly 3 – 4, 2019NDND
V2SE corner Northwestern and Keith, GurneeJuly 3 – 4, 20190.280.155
V33886 Morrison Drive, GurneeJuly 3 – 4, 20190.350.192
V41200 Estes Drive, GurneeJuly 3 – 4, 2019NDND
M1SE corner of N. Palmieri and Staben, WaukeganJuly 3 – 4, 20190.360.198
M23106 Belvidere Road, WaukeganJuly 3 – 4, 2019NDND
M3Pulaski Road and S. Shields Drive, WaukeganJuly 3 – 4, 20194.222.34
M4FP access west of Green Bay Road, WaukeganJuly 3 – 4, 2019NDND
M5800 S. Northpoint Blvd., WaukeganJuly 3 – 4, 20190.790.439
M5800 S. Northpoint Blvd., WaukeganJuly 3 – 4, 20190.440.25


Lake County Air Monitoring Wind Rose Maps

The maps posted below show the monitoring locations, air monitoring results by day, and a wind rose, which shows the wind information for each sampling day (i.e., wind direction, intensity, and percentage of time wind was blowing from the direction indicated). 

Note: As of August 14, 2019, all maps have been revised to include adjusted wind rose diagrams that provide a more detailed gradient for wind speed, more distinctive coloring to better distinguish wind speeds, and corrected wind speed data.

Wind roses are very important in determining the potential impact of a source of pollution. For more information, please see the U.S. EPA’s How to Read a Wind Rose (PDF).

Lake County Air Monitoring Lab Reports

Note: In the samples report ERG Jun 14_22 eto, samples from Jun 21 – 22, 2019 indicate a “sampled” date of June 22, 2019. The convention has been to report the date the sampling began as the “sampled” date. A corrected report will be posted soon, indicating the “sampled” date as June 21, 2019.