ATASCOSA RIVER

Last Updated: January 2, 2026

Get the latest River Levels, Streamflow, and Hydrology for in River flows across 2 streamgages of the Atascosa River


Summary

Total streamflow across the Atascosa River was last observed at 5 cfs, and is expected to yield approximately 10 acre-ft of water today; about 100% of normal. Average streamflow for this time of year is 5 cfs, with recent peaks last observed on 2023-04-08 when daily discharge volume was observed at 2,920 cfs.

Maximum discharge along the river is currently at the Atascosa Rv At Whitsett reporting a streamflow rate of 4.61 cfs. However, the streamgauge with the highest stage along the river is the Atascosa Rv Nr Mccoy with a gauge stage of 5.17 ft. This river is monitored from 2 different streamgauging stations along the Atascosa River, the highest being situated at an altitude of 265 ft, the Atascosa Rv Nr Mccoy.

River Details

Last Updated 2026-01-02
Discharge Volume 10 ACRE-FT
Streamflow 5.01 cfs
-0.24 cfs (-4.57%)
Percent of Normal 100.0%
Maximum 2,920.2 cfs
2023-04-08
Seasonal Avg cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Atascosa Rv Nr Mccoy
USGS 08207500
0 cfs 5.17 ft 8.11
Atascosa Rv At Whitsett
USGS 08208000
5 cfs 1.73 ft -5.53
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The river begins near the town of Poteet in Atascosa County and flows southeast into the Gulf of Mexico. Historically, the Atascosa River was a crucial water source for early Spanish explorers, and later for ranchers and farmers in the region. Today, it supports a variety of agricultural activities, including cattle ranching and irrigated farming. The river also has several reservoirs, including the Choke Canyon Reservoir and the Calaveras Lake, which provide drinking water and recreational opportunities for nearby communities. Despite ongoing conservation efforts, the Atascosa River faces challenges including pollution, overuse, and habitat loss.