Below is a list by segment of monitoring stations in the Rio Grande basin. Click on the station ID number to download an Excel format file that contains the water quality data for that station from 1995 to present, for conventional parameters and bacteria. For NOTES regarding data, click here.

The standards for an impairment in a water body are based on the use of the water body. A table of the USES BY SEGMENT and the ASSESSMENT CRITERIA can be found by clicking here for an Excel table. For the 2010 Texas Surface Water Quality Standards for the Rio Grande Basin (TSWQS), click here. For the Revised 2018 TSWQS, click here.
For a PDF file describing the MONTORING PARAMETERS, click here
For the complete 2022-2023 QUALITY ASSURANCE PROJECT PLAN (QAPP) for the USIBWC Clean Rivers Program, click here.
For the FY2021 MONITORING SCHEDULE for any basin in Texas click here and then select your basin of choice from the map. The Rio Grande Basin is Basin 23. Information about STATIONS can be found on our Studies - GIS data page.
For METALS data, click here for a single Excel file containing all of the data that we have for the entire basin by station ID, for total and dissolved metals as well as metals in sediment.
For ORGANICS IN SEDIMENT data from 2007-2016, click here. For a summary of the project and the organics parameters, click here. For a brief presentation on organics in sediment collection, click here.

Segment 2301 - Rio Grande Tidal

Station ID	Station Description
13176	Rio Grande Tidal at State Highway 2 near Boca Chica
16288	Rio Grande at Sabal Palm Sanctuary

Segment 2302 - Rio Grande below Falcon Reservoir

Station ID	Station Description
13177	Rio Grande below El Jardin at Brownsville
13178	Rio Grande International Bridge on US 77 at Brownsville
20449	Rio Grande at Brownsville PUB Water Treatment Plant No. 1 Intake between WTP Reservoir and Rio grande Levee
13179	Rio Grande near River Bend boat ramp, west of Brownsville
10249	Rio Grande 6.3 km downstream from San Benito pumping plant
17247	Rio Grande 100 m upstream from the FM 1015 Bridge at Progresso
13180	Rio Grande downstream of El Anhelo Drain South of Las Milpas
15808	Rio Grande 200 m upstream of Pharr International Bridge
13181	Rio Grande at International Bridge
13664	Rio Grande 0.5 mi below Anzalduas dam, 12.2 mi from Hidalgo
21012	Rio Grande River off Shuerbach Road / Airfield Road 1.2 Kilometers South and 70 Meters East from the intersection of Shuerbach Road and Military Road South of Mission CAMS 792
20696	Rio Grande at the El Morillo Tract of the Lower Rio Grande Valley National Wildlife Refuge
20698	Old Rio Grande Meander La Parido Banco Number 144 Boat Ramp
13184	Rio Grande at SH 886 near Los Ebanos
21749	Rio Grande, approx. 380m downstream of the confluence with Los Olmos Creek
21591	Arroyo Los Olmos, 400m upstream of the confluence with the Rio Grande, near Rio Grande City
13103	Arroyo Los Olmos Bridge on US 83 south of Rio Grande City
13104	Arroyo Los Olmos at SH 755 NW of Rio Grande City
13185	Rio Grande at Fort Ringhold, 1 mi downstream of Rio Grande City
13186	Rio Grande below Rio Alamo near Fronton
13187	Rio Grande 2.5 mi below Falcon Dam at diversion structure

Segment 2303 - International Falcon Reservoir

Station ID	Station Description
13189	Falcon Lake at International Boundary Monument #1
13192	Falcon Lake at International Boundary Monument #14
15818	Falcon Reservoir at San Ygnacio WTP intake

Segment 2304 - Rio Grande below International Amistad Reservoir

Station ID	Station Description
15817	Rio Grande at Webb/Zapata county line
13194	Rio Grande at the San Isidro Pump Station
15816	Rio Grande at Rio Bravo, 0.5 km downstream of El Cenizo
21542	Rio Grande at El Cenizo Park, 220m West of the intersection of Cadena and Jimenez
13196	Rio Grande at pipeline crossing, 13.9 km below Laredo
15815	Rio Grande at Masterson Rd. in Laredo, 9.9 downstream of International Bridge #1
13698	Rio Grande 1.1 mi. downstream from Highway Bridge between Laredo and Nuevo Laredo
15814	Rio Grande at International Bridge #2 in Laredo
13200	Rio Grande 50 yds upstream of Zacate Creek confluence with Rio Grande (Azteca)
13202	Rio Grande at Laredo WTP pump intake
15813	Rio Grande at CP&L power plant intake
20650	Rio Grande 115 Meters South and 304 meters West from the Intersection of Rancho Viejo Drive/Zebu Court and Rienda Drive at Father MacNaboe Park in Laredo
13116	Manadas Creek at FM 1472 north of Laredo
17410	Rio Grande below World Trade Bridge
15839	Rio Grande at Colombia Bridge, 2.7 km upstream of the Dolores pump station
17596	Rio Grande at Apache Ranch
15274	Rio Grande at IBWC Weir Dam, 6 mi south of El Indio
18792	Rio Grande at Kickapoo Casino
20999	Rio Grande at Kickapoo Casino Boat Ramp south of Eagle Pass
18795	Rio Grande at Kickapoo Reservation 1.92 km S and 2.02 Km west of RR 1021 at Maverick County Hwy 523 South of Eagle Pass
13205	Rio Grande near irrigation canal lateral in Eagle Pass
13206	Rio Grande at US 277 in Eagle Pass
20997	Rio Grande at Main Street Boat Ramp approx 400 meters upstream of US 57/International Bridge in Eagle Pass
13560	Rio Grande 4.5 mi downstream of Del Rio at Moody Ranch
13208	Rio Grande 12.8 mi below Amistad Dam, 340 m upstream of US 277 Bridge in Del Rio
13209	Rio Grande below Amistad Dam NW of Del Rio
15340	Rio Grande 3.4 km downstream of Amistad above Weir Dam

Segment 2305 - International Amistad Reservoir

Station ID	Station description
13211	Amistad Reservoir at International Boundary Buoy 1 adjacent to dam
13835	Amistad Reservoir at Buoy #1
15892	Amistad Reservoir Rio Grande Arm at Buoy #2
15893	Amistad Reservoir Devils River Arm at Buoy DRP

Segment 2306 - Rio Grande above Amistad Dam

Station ID	Station Description
13223	Rio Grande at Foster Ranch west of Langtry off Hwy 90 W
20631	Rio Grande at the confluence with Indian Creek in Terrell County
20625	Rio Grande 50 meters upstream of Silber Canyon South of Sanderson
20623	Rio Grande at Taylors Farm SW of Sanderson
13225	Rio Grande at FM 2627 (Gerstacker Bridge) below Big Bend
13228	Rio Grande at the mouth of Santa Elena Canyon
13229	Rio Grande below Rio Conchos confluence near Presidio
16730	Rio Grande at Rio Grande Village in Big Bend National Park
18441	Rio Grande at Lajitas Resort/FM 170 Boat Ramp0240 m upstream of Black Hills Creek confluence near Lajitas
16862	Rio Grande at Colorado Canyon Approx. 30 km SE of Redford on RR170 in Presidio County
17000	Rio Grande at Presidio Railroad Bridge
17001	Rio Grande at Presidio Ojinaga vehicle bridge.

Segment 2307 - Rio Grande below Riverside Diversion Dam

Station ID	Station Description
13230	Rio Grande 2.4 mi upstream from Rio Conchos confluence
17407	Rio Grande at Candelaria
20648	Rio Grande 1.47 kilometers Upstream of the Confluence with the Green River
17408	Rio Grande at Little Box Canyon
13232	Rio Grande at Neely Canyon, south of Fort Quitman
13233	Rio Grande Bridge off US 80 - IH 10 at Fort Hancock Port of Entry
15795	Rio Grande at Alamo Control Structure, 9.7 km upstream of Fort Hancock port of entry
15704	Rio Grande at Guadalupe point of entry bridge at FM 1106 west of Tornillo
16272	Rio Grande at San Elizario, 500 m upstream of Capomo Road end of pavement and 10.2 km downstream of Zaragoza International Bridge

Segment 2308 - Rio Grande below International Dam

Station ID	Station Description
14465	Rio Grande at Riverside canal 1.8 km downstream of Zaragosa International Bridge
13234	Rio Grande at Zaragosa International Bridge
15528	Rio Grande 1.3 km downstream from Haskell R. Street WWTP outfall
15529	Rio Grande 2.4 km upstream from Haskell R. Street WWTP outfall, south of Bowie High School football stadium in El Paso

Segment 2309 - Devil's River - Tributary of the Rio Grande

Station ID	Station Description
13237	Devils River at Pafford crossing near Comstock
13239	Devils River on Devils River State Natural Area, 1.7 km upstream of road crossing
14942	Dolan Springs 100 yds upstream of confluence with Devils River

Segment 2310 - Lower Pecos River - Tributary of the Rio Grande

Station ID	Station Description
13109	Independence Creek 0.5 mi downstream from John Chandler Ranch headquarters
18801	Lower Pecos River CAMS 0729
13240	Pecos River at gaging station 7.4 mi east of Langtry, 15 mi upstream of confluence with Rio Grande
13246	Pecos River 7.52 km upstream from the Val Verde/Terrell/Crockett county line
13248	Pecos River 0.1 km upstream of the Confluence with Independence Creek, Chandler Ranch
14163	Pecos River Approximately 0.5 mi downstream from the Confluence with Independence Creek
16379	Pecos River 0.7 mi downstream from US 90 W in Val Verde county

Segment 2311 - Upper Pecos River - Tributary of the Rio Grande

Station ID	Station Description
13249	Upper Pecos River Bridge on US 290 SE of Sheffield CAMS 0735
13257	Pecos River at US 67 NE of Girvin
20339	Pecos River 62 m North and 17 m east to the end of Horse Head Road
13258	Pecos River at FM 1053 NE of Imperial
13259	Pecos River at SH 18 SSW of Grandfalls
13260	Pecos River at FM 1776 SW of Monahans
13261	Pecos River near Pecos, Texas
13264	Pecos River near Mentone, Texas
13265	Pecos River at FM 652 bridge NE of Orla
15114	Pecos River 1.6 mi upstream of US 290, SE of Sheffield
14164	Pecos River approx. 2.98km upstream of the confluence with Independence Creek
20558	Kokernot Spring at Intersection of Alpine Creek and Hendryx Drive/Harrison Street/Sh 223 and 40 Meters East of the Kokernot Lodge on Sul Ross University Campus in Alpine

Segment 2312 - Red Bluff Reservoir

Station ID	Station Description
13267	Red Bluff Reservoir above dam, north of Orla
13269	Red Bluff Reservoir 1/2 mile south of Texas - New Mexico border

Segment 2313 - San Felipe Creek - Tributary of the Rio grande

Station ID	Station Description
13270	San Felipe Creek at Guyler confluence with the Rio Grande
15820	San Felipe Creek at West Springs, near West Wells in Del Rio
15821	San Felipe Creek at Blue Hole flood gates in park between US90 bridge and Southern Pacific RR bridge in Del Rio

Segment 2314 - Rio Grande above International Dam

Station ID	Station Description
15089	Rio Grand at American Eagle Brick Factory
17040	Rio Grande at Anapra Bridge
13272	Rio Grande at Courchesne Bridge, 1.7 mi upstream of American Dam
13274	Rio Grande at Borderland Bridge
13275	Rio Grande at Vinton Bridge
13276	Rio Grande upstream of East Drain