Comal County Monitoring Sites

Putting your cursor over the stream site number on the map below will generate a picture of the site (if available). Clicking on the site number will take you down the page to a table of sites with locations, parameters and frequency of analysis. Below the table is a legend defining the abbreviations used in the table.

TCEQ Station ID #12570TCEQ Station ID #12570: Dry Comal Creek at Seguin St., New Braunfels
TCEQ Station ID #12598TCEQ Station ID #12598: Canyon Reservoir (Canyon Park Marina)
TCEQ Station ID #12653TCEQ Station ID #12653: Comal River at Hinman Island
TCEQ Station ID #12658TCEQ Station ID #12658: Guadalupe River at River Road Second Crossing, upstream of New Braunfels
TCEQ Station ID #13700TCEQ Station ID #13700: Guadalupe River at RR 311, 1.9 mi SE of Spring Branch
TCEQ Station ID #17443TCEQ Station ID #17443: Canyon Reservoir at Jacobs Creek Park

Guadalupe River Basin Surface Water Quality Monitoring Program
GBRA Monitoring Locations

TCEQ Station ID Description Latitude/ Longitude Parameters/ Frequency* Monitoring Types/By Historical Data
12570 Dry Comal Creek at Seguin St., New Braunfels 29°42'16" / 99°07'45" C/Monthly; F/Monthly; M/Annually; AC/annual; RB/annual; RN/annual; BAC/Monthly Fixed/GBRA PDF | Excel
12598 Canyon Reservoir (Canyon Park Marina) 29°53'57" / 98°13'24" C/Monthly; BAC/Monthly Fixed/GBRA PDF | Excel
12653 Comal River at Hinman Island 29°42'29" / 98°07'26" C/Monthly; F/Monthly; BAC/monthly Fixed/GBRA PDF | Excel
12656 Guadalupe River At Cypress Bend Park 29°42'50" / 98°06'25" C/Monthly; F/Monthly; BAC/monthly Fixed/GBRA PDF | Excel
12658 Guadalupe River at River Road Second Crossing, upstream of New Braunfels 29°46'43" / 98°09'37" C/Monthly; F/Monthly; BAC/Monthly Fixed/GBRA PDF | Excel
13700 Guadalupe River at RR 311, 1.9 mi SE of Spring Branch 29°53'00" / 98°23'00" C/Monthly; F/Monthly; BAC/Monthly Fixed/GBRA PDF | Excel
15082 Comal River at Landa Park Area 16 29°42’35" / 98°8'2" C/Monthly; F/Monthly; BAC/Monthly Fixed/GBRA PDF | Excel
16703 Guadalupe River at CR306 29°51'47" / 98°9'54" C/Monthly; F/Monthly; BAC/Monthly Fixed/GBRA PDF | Excel
17443 Canyon Reservoir at Jacobs Creek Park 29°52'59" / 98°13'12" C/Quarterly; BAC/Quarterly Fixed/GBRA PDF | Excel

Guadalupe River Basin Surface Water Quality Monitoring Program
TCEQ Monitoring Locations

TCEQ Station ID Description Latitude/ Longitude Parameters/ Frequency* Monitoring Types/By Historical Data
12597 Canyon Lake at Canyon Dam 29°52'19" / 98°12'11" C/Quarterly; BAC/Quarterly Fixed/TCEQ** TCEQ
12600 Canyon Lake mid-lake south of Potters Creek Park at westend of park 29°53'45" / 98°16'57" C/Quarterly; BAC/Quarterly Fixed/TCEQ** TCEQ
12601 Canyon Lake headwaters above Cranes Mill Park 29°54'33" / 98°19'54" C/Quarterly; BAC/Quarterly; M-sed/Semi-ann Fixed/TCEQ** TCEQ
13511 Guadalupe River at Gruene Road crossing approx. 0.8 km SW of RR 306 in Gruene 29°44'17" / 98°06'22" C/Quarterly; F/Quarterly; BAC/Quarterly Fixed/TCEQ** TCEQ
16703 Guadalupe River 200 yds upstream of bridge on FM 306,0.5 mi downstream of Horseshoe Falls 29°51'47" / 98°09'50" C/Quarterly; BAC/Quarterly; F/Quarterly Fixed/TCEQ** TCEQ

** The ability to look up data for a specific Station ID on the TCEQ website is no longer available. However, by using the TCEQ link above, it is possible to download text files for a segment; so if you know the segment, you can scroll down to it and select it for downloading. The data download query requires a great deal of knowledge of not only converting and combining text files, but also for understanding and looking up the codes in the Data Management Reference Guide.

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.

© 1998 Guadalupe-Blanco River Authority

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