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Calaveras Lake C59 Data by Site by Date (all parameters)

Use this form to retrieve hourly data collected at Calaveras Lake C59. 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 Texas this is Central 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.

Select a different site
Month:Day:Year:Time Format:
Sulfur Dioxide Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
Nitrogen Dioxide Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
PM-2.5 Highlights:  Moderate   Unhealthy for Sensitives   Unhealthy   Very Unhealthy   Hazardous  
Green underline for validated data

The table below contains hourly averages for all the pollutants and meteorological conditions measured at Calaveras Lake C59 for Friday, October 31, 2014. All times shown are in CST.

Parameter MeasuredMorning Parameter Measured POC
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00
Total Suspended Particulate (Lcl) 9.739.227.111.390.891.500.910.90 FEW NA Total Suspended Particulate (Lcl) 1
Sulfur Dioxide 0.40.20.30.30.30.30.30.4 FEW NA Sulfur Dioxide 1 R MDL
Nitric Oxide 4.70.60.50.40.60.50.40.7 FEW NA Nitric Oxide MDL
Nitrogen Dioxide 15.96.64.42.77.05.65.66.4 FEW NA Nitrogen Dioxide 1 R MDL
Oxides of Nitrogen 20.47.34.93.17.66.06.07.1 FEW NA Oxides of Nitrogen MDL
Ozone 1222233128262728 FEW NA Ozone 1 R MDL
Wind Speed 2.34.36.19.69.112.512.112.6 FEW NA Wind Speed 1
Resultant Wind Speed 2.04.15.76.48.112.312.012.4 FEW NA Resultant Wind Speed 1
Resultant Wind Direction 13056554536332726 FEW NA Resultant Wind Direction 1
Maximum Wind Gust 3.410.213.129.218.119.518.620.1 FEW NA Maximum Wind Gust 1
Std. Dev. Wind Direction 27172146278910 FEW NA Std. Dev. Wind Direction 1
Outdoor Temperature 68.068.968.867.867.266.466.266.5 FEW NA Outdoor Temperature 1
PM-2.5 (Local Conditions) Acceptable 8.717.97.88.44.97.07.86.8 FEW NA PM-2.5 (Local Conditions) Acceptable MDL
Parameter MeasuredMid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00Parameter Measured POC
Morning
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.

PLEASE NOTE:  This data has not been verified by the TCEQ 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 TCEQ 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.

Following EPA reporting guidelines, negative values may be displayed in our hourly criteria air quality data beginning 1/1/2013, down to the negative of the EPA listed Method Detection Limit (MDL) for the particular instrument that made the measurements. The reported concentrations can be negative due to zero drift in the electronic instrument output, data logger channel, or calibration adjustments to the data. Prior to 1/1/2013, slightly negative values were automatically set to zero.