By Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, and Mary Janet
| Map Key | Water-Quality Station ID | Streamflow Station ID | Major River Basin and Water-Quality Station Name | Starting Water Year | Station Latitude | Station Longitude | Contributing Drainage Area (sq. mi.) |
| Mississippi River Basin | |||||||
| 1 | 03216600 | 03216600 | Ohio River at Greenup Dam near Greenup, KY | 1997 | 38°38'48" | 82°51'38" | 61,500 |
| 2 | 03303280 | 03303280 | Ohio River at Cannelton Dam, KY | 1996 | 37°53'58" | 86°42'20" | 96,400 |
| 3 | 03378500 | 03377500 | Wabash River at New Harmony, IN | 1997 | 38°07'55" | 87°56'25" | 29,300 |
| 4 | 03609750 | 03609500 | Tennessee River at Highway 60 near Paducah, KY | 1997 | 37°02'16" | 88°31'46" | 40,900 |
| 5 | 03612500 | 03611500 | Ohio River at Dam 53 near Grand Chain, IL | 1996 | 37°12'13" | 89°02'27" | 203,600 |
| 6 | 05330000 | 05330000 | Minnesota River near Jordan, MN | 1996 | 44°41'35" | 93°38'30" | 16,200 |
| 7 | 05331580 | 05331000 | Mississippi River blw Lock & Dam 2 at Hastings, MN | 1996 | 44°44'48" | 92°51'08" | 37,100 |
| 8 | 05420500 | 05420500 | Mississippi River at Clinton, IA | 1996 | 41°46'50" | 90°15'07" | 92,100 |
| 9 | 05587455 | 05587450 | Mississippi River below Grafton, IL | 1997 | 38°57'04" | 90°22'16" | 172,500 |
| 10 | 06185500 | 06185500 | Missouri River near Culbertson, MT | 1997 | 48°07'20" | 104°28'31" | 93,200 |
| 11 | 06329500 | 06329500 | Yellowstone River near Sidney, MT | 1996 | 47°40'42" | 104°09'22" | 69,000 |
| 12 | 06338490 | 06338490 | Missouri River at Garrison Dam, ND | 1997 | 47°30'08 | 101°25'50" | 180,900 |
| 13 | 06440000 | 06440000 | Missouri River at Pierre, SD | 1997 | 44°22'23" | 100°22'03" | 242,300 |
| 14 | 06610000 | 06610000 | Missouri River at Omaha, NE | 1996 | 41°15'32" | 95°55'20" | 320,800 |
| 15 | 06805500 | 06805500 | Platte River at Louisville, NE | 1996 | 41°00'55" | 96°09'28" | 85,500 |
| 16 | 06934500 | 06934500 | Missouri River at Hermann, MO | 1996 | 38°42'36" | 91°26'21" | 519,700 |
| 17 | 07022000 | 07022000 | Mississippi River at Thebes, IL | 1996 | 37°13'00" | 89°27'50" | 710,300 |
| 18 | 07263620 | 07263450 | Arkansas River at David D. Terry Lock & Dam below Little Rock, AR | 1996 | 34°40'07" | 92°09'18" | 157,800 |
| 19 | 07373420 | 07295100 | Mississippi River near St. Francisville, LA | 1996 | 30°45'30" | 91°23'45" | 1,144,900 |
| 20 | 07381495 | 07381490 | Atchafalaya River at Melville, LA | 1996 | 30°41'26" | 91°44'10" | 92,900 |
| Rio Grande Basin1 | |||||||
| 21 | 08364000 | 08364000 | Rio Grande at El Paso, TX | 1996 | 31°48'10" | 106°32'25" | 39,600 |
| 22 | 08377200 | 08377200 | Rio Grande at Foster Ranch near Langtry, TX | 1996 | 29°46'50" | 101°45'20" | 94,100 |
| 23 | 08447410 | 08447410 | Pecos River near Langtry, TX | 1996 | 29°48'10" | 101°26'45" | 44,200 |
| 24 | 08450900 | 08450900 | Rio Grande River below Amistad Reservoir near Del Rio, TX | 1996 | 29°25'30" | 101°02'27" | 145,500 |
| 25 | 08459200 | 08459200 | Rio Grande at Pipeline Crossing below Laredo, TX | 1998 | 27°24'01" | 99°29'18" | 156,500 |
| 26 | 08461300 | 08461300 | Rio Grande below Falcon Dam, TX | 1996 | 26°33'25" | 99°10'05" | 181,000 |
| 27 | 08470400 | 08470400 | Arroyo Colorado at Harlingen, TX | 1996 | 26°10'24" | 97°42'01" | 182 |
| 28 | 08475000 | 08475000 | Rio Grande near Brownsville, TX | 1996 | 25°52'35" | 97°27'15" | 197,000 |
| Colorado River Basin | |||||||
| 29 | 09180500 | 09180500 | Colorado River near Cisco, UT | 1996 | 38°48'38" | 109°17'34" | 24,000 |
| 30 | 09315000 | 09315000 | Green River at Green River, UT | 1996 | 38°59'10" | 110°09'02" | 40,800 |
| 31 | 09379500 | 09379500 | San Juan River near Bluff, UT | 1996 | 37°08'49" | 109°51'51" | 22,900 |
| 32 | 09380000 | 09380000 | Colorado River at Lees Ferry, AZ | 1996 | 36°51'53" | 111°35'15" | 108,100 |
| 33 | 09404200 | 09404200 | Colorado River above Diamond Creek near Peach Springs, AZ | 1997 | 35°46'25" | 113°21'46" | 145,600 |
| 34 | 09421500 | 09421500 | Colorado River below Hoover Dam, AZ-NV | 1996 | 36°00'55" | 114°44'16" | 166,900 |
| 35 | 09429490 | 09429490 | Colorado River above Imperial Dam, CA-AZ | 1997 | 32°53'01" | 114°28'00" | 183,200 |
| 36 | 09522000 | 09522000 | Colorado River at NIB above Morelos Dam near Andrade, CA | 1996 | 32°43'07" | 114°43'05" | 245,900 |
| Columbia River Basin | |||||||
| 37 | 12400520 | 12399500 | Columbia River at Northport, WA | 1996 | 48°55'21" | 117°46'32" | 60,400 |
| 38 | 12472900 | 12472800 | Columbia River at Vernita Bridge near Priest Rapids Dam, WA | 1996 | 46°38'24" | 119°43'54" | 96,300 |
| 39 | 13353200 | 13353000 | Snake River at Burbank, WA | 1996 | 46°12'59" | 119°01'22" | 107,900 |
| 40 | 14128910 | 14105700 | Columbia River at Warrendale, OR | 1997 | 45°36'45" | 122°01'35" | 242,200 |
| 41 | 14211720 | 14211720 | Willamette River at Portland, OR | 1996 | 45°31'07" | 122°40'00" | 11,500 |
| 42 | 14246900 | 14246900 | Columbia River at Beaver Army Terminal near Quincy, OR | 1996 | 46°10'54" | 123°10'58" | 258,800 |
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