Gonzales County Monitoring Sites
On the bottom, there is a table of sites with locations, parameters and frequency of analysis. Below the table is a legend defining the abbreviations used in the table.
Guadalupe River Basin Surface Water Quality Monitoring Program
GBRA Monitoring Locations
| TCEQ Station ID | Description | Latitude / Longitude | Parameters / Frequency* | Monitoring Types/By | Data to August 2020 | Data from September 2020 |
|---|---|---|---|---|---|---|
| 14937 | Peach Creek at CR 353 | 29°30’28” / -97°18’49” | C/Monthly; F/Monthly; M/Annually; AC/Annually; RN/Annually; BAC/Monthly; RB/Annually | Fixed/GBRA | Excel | Excel |
| 15110 | Guadalupe River at H-5 Dam near Gonzales | 29°28’08” / -97°29’24” | C/Monthly; F/Monthly; BAC/Monthly | Fixed/GBRA | Excel | Excel |
| 15996 | Elm Creek at CR 108 (1.7 km south of Smiley) | 29°15’29” / -97°38’23” | Retired | GBRA | – | |
| 15997 | Elm Creek at CR 534 (6km ESE of Nixon) | 29°14’04” / -97°42’17” | Retired | GBRA | – | |
| 15998 | Sandies Creek at FM 1116 4 km east of Smiley and approximately 3 km upstream of confluence with Elm Creek | 29°15’37” / -97°33’31” | F/Monthly; BAC/Monthly; DO24 | GBRA | Excel | Excel |
| 16578 | San Marcos River at Hwy 90A near city of Gonzales, 7km upstream of confluence with Guadalupe River | 29°30’50” / -97°29’38” | C/Quarterly; F/Quarterly; BAC/Quarterly; FT/Annually | Fixed/GBRA | Excel | Excel |
| 17894 | Elm Creek on Lazy F Ranch (515 meters upstream of old US 87 Bridge) | 29°24’31” / -97°55’61” | BAC/Quarterly; F/Quarterly; C/Quarterly; DO24 | GBRA | Excel | Excel |
| 17934 | Peach Creek at FM 1680 | 28°53’49” / -97°08’17” | BAC/Monthly; C/Monthly; F/Monthly; DO24 | GBRA | Excel | Excel |
| 20470 | Guadalupe River at Hwy 183 near Hochheim | 29°18’52” / -97°18’12” | C/Quarterly; F/Quarterly; BAC/Quarterly | Fixed/GBRA | Excel | Excel |
| 21736 | Guadalupe River 200 Meters Downstream of H-4 Dam at Lake Gonzales | 29°29’42” / -97°37’21” | C/Quarterly; F/Quarterly; BAC/Quarterly | Fixed/GBRA | Excel | Excel |
Legend
The C symbol represents the following parameters and their TCEQ codes: 00010, Temperature, Water (Centigrade); 00094 Conductivity, Field (mmhos/cm @ 25C); 00300 Oxygen, Dissolved (mg/L); 00400 pH (standard units); 00631 Nitrate/Nitrite-Nitrogen (mg/L as N); 00665 Total Phosphorus (mg/L as P); 00530 Solids, Total Suspended (mg/L); 82079 Turbidity (NTU); 00945 Sulfate (mg/L); 00940 Chloride (mg/L); 32211 Chlorophyll-a (mg/L); 00900 Total Hardness (mg/L); and 31648 E. coli (#/100 mL).
The F symbol means that a flow measurement will be provided. When possible, this information will be derived from U.S. Geological stream gages; at some sites, the proximity of a hydroelectric generating facility allows the calculation of flow based upon power generated; at the remainder of the sites field measurements will be made by GBRA Lab personnel or UGRA personnel.
The M symbol denotes metals. All M samples will be collected by the GBRA. The dissolved metals to be analyzed for are 01106 Aluminum (mg/L as Al); 01090 Zinc (mg/L as Zn); 01000 Arsenic (mg/L as As); 00915 Calcium (mg/L as Ca); 01025 Cadmium (mg/L as Cd); 00925 Magnesium (mg/L as Mg); 46570 Hardness, calc, (mg/L as CaCO3); 01005 Barium (mg/L as Ba); 01030 Chromium (mg/L as Cr); 01040 Copper (mg/L as Cu); 01046 Iron (mg/L as Fe); 01049 Lead (mg/L as Pb); 01056 Manganese (mg/L as Mn); 01065 Nickel (mg/L as Ni); 01060 Molybdenum (mg/L as Mo); 01145 Selenium (mg/L as Se); 71890 Mercury, total (mg/L as Hg); and 01075 Silver (mg/L as Ag).
AC means Aquatic Commun-Habitat.
RN means Routine Nekton.
N/A means not active. The station is not being monitored.
RB means Routine Benthics.
FT means Fish Tissue.
BAC means TSWQS Bacteria sampling.
O means organics in water.
D024 means dissolved oxygen measurements over a 24 hour period.