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Use this form to retrieve hourly data collected at Larwill. Although this is the most current data, it is not considered official until it has been certified by the technical staff. This information is updated hourly.
This web page provides the most current hourly averaged data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour are based on measurements taken from noon to 1:00 p.m. The noon average will not be calculated until after 1:00 p.m. The noon average will then be available on our external server from 1:15 p.m. to 1:30 p.m. This results in an apparent one-hour time lag in the data. We also present our data in Local Standard Time for each measuring site. For most of Indiana this is Eastern Standard Time. During Daylight Savings, this introduces another apparent one-hour time lag in the data.
Use the controls below to select a different date or time format and to control cell highlighting based on measured sulfur dioxide, nitrogen dioxide or PM-2.5 levels. Click on the Generate Report button once you have made your selections.
Click on the Plot Data button once the tabular report has been generated to open a separate window containing data plots.
The table below contains hourly averages for all the pollutants and meteorological conditions measured at Larwill for Saturday, December 3, 2016. All times shown are in EST.
|Parameter Measured||Morning||Afternoon||Parameter Measured||POC|
|Sulfur Dioxide||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||0.0||FEW||Sulfur Dioxide||1 R|
|Nitric Oxide||1.7||1.7||1.7||1.7||1.7||1.7||1.7||1.7||1.7||1.9||2.1||2.5||2.2||2.0||1.9||1.8||1.7||1.7||FEW||Nitric Oxide||1|
|Nitrogen Dioxide||4.3||3.7||3.3||3.2||3.3||3.4||2.6||3.0||3.4||2.9||3.4||4.5||3.9||4.0||3.7||3.3||3.5||3.6||FEW||Nitrogen Dioxide||1 R|
|Oxides of Nitrogen||4.3||3.8||3.4||3.3||3.4||3.5||2.7||3.1||3.6||3.2||3.8||5.4||4.5||4.5||4.0||3.6||3.7||3.7||FEW||Oxides of Nitrogen||1|
|Wind Speed||2.7||3.4||3.2||3.7||4.8||6.0||5.2||6.1||6.2||5.6||3.7||5.0||5.0||4.6||5.0||4.8||4.1||2.8||FEW||Wind Speed||1|
|Resultant Wind Speed||2.6||3.2||3.1||3.6||4.7||5.8||5.1||5.9||6.0||5.4||3.4||4.5||4.7||4.3||4.8||4.6||3.8||2.6||FEW||Resultant Wind Speed||1|
|Resultant Wind Direction||271||268||278||264||266||283||275||274||272||283||290||294||251||248||245||237||237||274||FEW||Resultant Wind Direction||1|
|Maximum Wind Gust||4.8||6.4||5.7||6.7||9.9||12.4||8.6||11.6||11.7||10.9||7.6||8.8||10.6||9.4||9.1||8.6||8.2||4.8||FEW||Maximum Wind Gust||1|
|Std. Dev. Wind Direction||14||17||15||13||13||12||11||13||12||14||23||27||19||20||16||18||23||23||FEW||Std. Dev. Wind Direction||1|
|Outdoor Temperature||35.6||35.3||35.3||35.3||35.3||34.8||34.1||33.8||33.6||34.0||34.9||35.8||36.0||36.1||36.0||35.8||35.3||34.6||FEW||Outdoor Temperature||1|
|Relative Humidity||73||75||74||73||72||73||70||69||69||68||66||64||64||62||61||62||61||62||FEW||Relative Humidity||1|
|PM-2.5 (Local Conditions)||8.26||7.82||10.40||10.89||9.91||8.54||9.71||10.63||9.91||8.54||9.93||10.16||9.74||12.85||13.09||13.13||16.43||FEW||NA||PM-2.5 (Local Conditions)||3|
|Parameter Measured||Mid||1:00||2:00||3:00||4:00||5:00||6:00||7:00||8:00||9:00||10:00||11:00||Noon||1:00||2:00||3:00||4:00||5:00||6:00||Parameter Measured||POC|
|Maximum values for each parameter are bold within the table. Minimum values are bold italic.|
|R - Data from this instrument meets EPA quality assurance criteria for regulatory purposes.|
The color-coding of the hourly PM-2.5 data is based on a 1-hour to 24-hour projection. This projection is based on statistics compiled over several years comparing the daily maximum 1-hour average to the midnight-to-midnight 24-hour average.
The table below shows the levels, color-coding, and suggested actions for both the 1-hour projection and the actual 24-hour standard.
|Color||Air Quality Rating||1-Hour
|Actions to take|
|Moderate||15.5 - 35.4||12.1 - 35.4||
PLEASE NOTE: This data has not been verified by the IDEM and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from IDEM ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.