National Weather Service Expanded River Data
National Weather Service Recreation Advisory for Falls City (click here for full version)
Use this chart to help determine how accessible the river is for contact recreation at the site locations indicated in the map above. The Site Number links to the USGS' data page for that site where you can find current and historic data for flow rates, depths, etc. at the gage station. The E. coli Bacteria Result links to the past 10 weeks sample data for that gage station so that you can review the current trends in indicator bacteria levels.
Site Number |
USGS Station Name |
Flow Sample Time |
Flow Volume |
| 08178565 |
San Antonio River at Loop 410, San Antonio, TX |
07/31 at 6:15 AM |
52 ft3/s |
| 08183200 |
San Antonio River near Floresville, TX |
07/31 at 7:00 AM |
325 ft3/s |
| 08183500 |
San Antonio River near Falls City, TX |
07/31 at 6:15 AM |
385 ft3/s |
| 08188500 |
San Antonio River at Goliad, TX |
07/31 at 7:00 AM |
719 ft3/s |
| 08186000 |
Cibolo Creek near Falls City, TX |
07/31 at 6:15 AM |
78 ft3/s |
ft3/s—Cubic Feet per Second | NA—Data is not currently available
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The following links are to existing NOAA stations, and do not necessarily correspond to the USGS stations listed above. They are provided as additional data to help you determine how you can enjoy the river the most.
The San Antonio River Authority (SARA) has been gathering water quality data in the San Antonio River Basin for approximately 40 years.
Currently, SARA collects water quality data at more than 50 locations within the basin, with weekly E. coli bacteria data collection at four sites along the San Antonio River.
The data has established that the most widespread water quality problem within the San Antonio River Basin is high levels of bacteria after rain events.
When rain falls directly on undisturbed natural surfaces, the soils, rocks, plants, and their root systems help 1) to filter out bacteria and pollutants before they reach our rivers, creeks, and streams and 2) to slow down the water as it travels through the basin, reducing the bacteria- and pollution-carrying sediments that are picked up and deposited into our water ways.
However, much of our rain falls on rooftops, streets, sidewalks, and other such surfaces—as well as on farm- and ranch-land where fertilizers, animal feed, and animal wastes are not adequately buffered from our rivers, creeks, and streams. This water, called runoff, carries bacteria and bacteria-promoting materials into our basin’s waterways.
Since this is a common problem in most basins within the state, recreationists who plan to do river-related activities in any basin should research that basin’s bacteria levels before engaging in contact recreation.
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San Antonio River at Loop 410 |
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San Antonio River near Floresville |
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San Antonio River near Falls City |
| San Antonio River at Goliad |
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| Cibolo Creek near Falls City |
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To plan for your San Antonio River Basin excursion, click on the line graph links to view a table that reflects the last 10 samples for E. coli bacteria at the four San Antonio River sites referenced above.
