Skip to content. | Skip to navigation

Personal tools


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. 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:
Green underline for validated data

The table below contains hourly averages for all the pollutants and meteorological conditions measured at Calaveras Lake C59 for Saturday, September 24, 2016. All times shown are in CST.

Parameter MeasuredMorningAfternoon Parameter Measured POC
Mid 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00
Total Suspended Particulate (Lcl) 42.4741.6040.7343.3944.6144.8745.7443.5542.9741.5543.2341.7342.2343.9036.8829.6029.1230.6632.40 FEW NA Total Suspended Particulate (Lcl) 1
Sulfur Dioxide CAL NA Sulfur Dioxide 1 R MDL
Nitric Oxide - FEW NA Nitric Oxide MDL
Nitrogen Dioxide FEW NA Nitrogen Dioxide 1 R MDL
Oxides of Nitrogen FEW NA Oxides of Nitrogen MDL
Ozone 777763361217212224242526262422 FEW NA Ozone 1 R MDL
Wind Speed FEW NA Wind Speed 1
Resultant Wind Speed FEW NA Resultant Wind Speed 1
Resultant Wind Direction 12510094119117128125121135151147117122125112107116111110 FEW NA Resultant Wind Direction 1
Maximum Wind Gust FEW NA Maximum Wind Gust 1
Std. Dev. Wind Direction 131717121499151319172324161617191413 FEW NA Std. Dev. Wind Direction 1
Outdoor Temperature 76.676.676.576.475.975.575.376.979.783.185.487.488.288.587.787. FEW NA Outdoor Temperature 1
PM-2.5 (Local Conditions) Acceptable 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 9:0010:0011:00Noon 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00Parameter 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.

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.