| WBID | Waterbody | Location | County(s) | IR Category | Impairment(s) |
| IA 06-BSR-0020_2 | Big Sioux River | from confluence with Beaver Cr near Canton, SD (S36, T98N, R49W, Lyon Co.) to confluence with Ninemile Cr. in S25, T100N | Lyon | 4a | bacteria |
| IA 06-BSR-0010_4 | Big Sioux River | from confluence with Indian Cr. (S9, T93N, R48W, Plymouth Co.) to confluence with Rock R. in S1, T95N, R48W, Sioux Co. | Plymouth, Sioux | 4a | bacteria |
| IA 06-BSR-0010_3 | Big Sioux River | from confluence Brule Cr. near Richland, SD, (S33, T92N, R49W, Plymouth Co.) to confluence with Indian Cr. in S9, T93N, | Plymouth | 5b | fish kill |
| IA 06-LSR-02850-L_0 | Big Spirit Lake | Dickinson County, S33,T100N,R36W, at Spirit Lake | Dickinson | 5a | bacteria |
| IA 04-RAC-00475-L_0 | Black Hawk Lake | Sac County, S35,T87N,R36W, at Lake View. | Sac | 5a | bacteria; algae; turbidity |
| IA 04-RAC-00477-L_0 | Black Hawk Pits | Sac County, S9,T86N,R36W, 2 mi S of Lake View. | Sac | 4c | habitat alteration |
| IA 06-BSR-0023_0 | Broken Kettle Creek | from mouth (S9, T90N, R48W, Plymouth Co.) to confluence with an unnamed tributary in S19, T92N, R47W, Plymouth Co. | Plymouth | 5b | biological |
| IA 04-UDM-0400_0 | Brown Creek | mouth (NW 1/4, S24, T99N, R34W, Emmet Co.) to IA/MN state line. | Emmet | 4d | fish kill |
| IA 06-WEM-00485-L_0 | Browns Lake | Woodbury County, S32,T87N,R47W, 2 mi W of Salix. | Woodbury | 5a | turbidity |
| IA 06-LSR-02890-L_0 | Center Lake | Dickinson County, S7,T99N,R36W, 2 mi WSW of Spirit Lake. | Dickinson | 5a | pH |
| IA 06-LSR-00790-L_0 | Crawford Creek Impoundment | Ida County, S10,T86N,R41W, 2.5 mi. S of Battle Creek. | Ida | 5a | algae |
| IA 06-FLO-0070_0 | Deep Creek | mo to trib S35,T94N,R43W Sioux Co. | Plymouth, Sioux | 5b | biological; fish kill |
| IA 04-UDM-0100_3 | Des Moines River | from confluence with Jack Cr. (S35, T97N, R33W, Palo Alto Co.) to confluence with Drainage Ditch No. 151 at N line, S6, | Emmet, Palo Alto | 4d | fish kill |
| IA 04-UDM-0100_4 | Des Moines River | from confluence Drainage Ditch No. 151 (N line, S6, T98N, R33W, Emmet Co.) to confluence with School Cr. at Estherville | Emmet | 4d | fish kill |
| IA 06-BSR-0035_0 | Dry Creek | mouth (T94N R48W Sec4) to headwaters (T97N R45W Sec32) | Sioux | 5b | fish kill; biological |
| IA 04-UDM-03850-L_0 | Five Island Lake | Palo Alto County, S18,T96N,R32W, at Emmetsburg. | Palo Alto | 4a | algae, turbidity |
| IA 06-FLO-0020_1 | Floyd River | from confluence with West Branch Floyd R. (S2, T91N, R46W, Plymouth Co.) to city of Alton at north line, S11, T94N, R44W | Plymouth, Sioux | 5b | biological |
| IA 06-FLO-0020_2 | Floyd River | from city of Alton (north line, S11, T94N, R44W, Sioux Co.) to confluence with North Fork Floyd R. in S9, T97N, R41W, O' | O'Brien, Sioux | 5b | biological; fish kill |
| IA 06-FLO-0010_0 | Floyd River | mouth to West Branch Floyd R. in S2, T91N, R46W, Plymouth Co. | Plymouth, Woodbury | 5a | bacteria |
| IA 06-LSR-0108_0 | Halfway Creek | mouth (S22, T89N, R39W, Ida Co.) to confluence with unnamed tributary in SE 1/4, S24, T89N, R39W, Ida Co. | Ida | 4c | habitat alterations |
| IA 06-BSR-0027_0 | Indian Creek | mo to trib S33,T94N,R47W Sioux Co. | Plymouth, Sioux | 5p | bacteria |
| IA 04-UDM-03985-L_0 | Ingham Lake | Emmet County, S12,T98N,R33W, 6 mi E of Wallingford. | Emmet | 4a | algae, turbidity |
| IA 06-LSR-0143_0 | Johns Creek | mouth (S24, T90N, R44W, Plymouth Co.) to confluence with Rathburn Cr. in S26, T91N, R44W, Plymouth Co. | Plymouth | 5b | biological |
| IA 04-RAC-0130_2 | Lake Creek | E ln S12,T86N,R34W to DD-65/9&13 Calhoun | Calhoun | 5b | fish kill |
| IA 06-BSR-00280-L_0 | Lake Pahoja | Lyon County, S23,T99N,R48W, 5 mi SSW of Larchwood. | Lyon | 5a | bacteria; algae; ammonia |
| IA 04-RAC-01700_0 | Lateral 6 | from mouth (T92N R36W Sec17) to headwaters (T92N R37W Sec4) | Buena Vista | 5b | fish kill |
| IA 04-RAC-01620-L_0 | Little Clear Lake | Pocahontas County, S6,T91N,R34W, 11 mi W of Pocahontas. | Pocahontas | 4c | habitat alteration |
| IA 06-FLO-0080_0 | Little Floyd River | mouth (S1, T96N, R43W, Sioux Co.) to confluence with Lamkin Cr. in S8, T96N, R42W, O'Brien Co. | O'Brien, Sioux | 4a | biological: sediment; organic enrichment |
| IA 06-FLO-0085_0 | Little Floyd River | From confluence with Lamkin Cr to headwaters. | O'Brien | 4d | fish kill |
| IA 06-BSR-0060_1 | Little Rock River | mouth (S35, T98N, R46W, Lyon Co.) to confluence with Otter Cr. in NW 1/4, S21, T98N, R44W, Lyon Co. | Lyon | 5p | bacteria |
| IA 06-BSR-0060_3 | Little Rock River | from confluence with Argo Slough (S17, T99N, R43W, Lyon Co.) to the Iowa/Minnesota state line | Lyon, Osceola | 5p | bacteria |
| IA 06-LSR-00250-L_0 | Little Sioux Park Lake | Woodbury County, S12,T89N,R42W, 2 mi SSW of Correctionville. | Woodbury | 5a | pH |
| IA 06-LSR-0040_1 | Little Sioux River | from confluence with Ocheyedan R. at Spencer (S13, T96N, R37W, Clay Co.) to confluence with Milford Cr. in NW 1/4, S14, | Clay, Dickinson | 5p | bacteria |
| IA 06-LSR-0040_2 | Little Sioux River | from confluence with Milford Cr. (NW 1/4, S14, T98N, R37W, Dickinson Co.) to confluence with West Fork Little Sioux R. i | Dickinson | 5p | bacteria |
| IA 06-LSR-0040_3 | Little Sioux River | from confluence with West Fork Little Sioux R. (S36, T100N, R38W, Dickinson Co.) to the Iowa/Minnesota state line | Dickinson | 5b | biological |
| IA 06-LSR-0030_1 | Little Sioux River | from Highway 3 (S26, T92N, R40W, Cherokee Co.) to confluence with Waterman Cr. in S26, T94N, R39W, O'Brien Co. | Cherokee, O'Brien | 5a | bacteria |
| IA 06-LSR-0030_4 | Little Sioux River | from confluence with Willow Cr. (S17, T94N, R36W, Clay Co.) to east corporate limit of Spencer at west line of S17, T96N | Clay | 5p | bacteria |
| IA 06-LSR-0020_1 | Little Sioux River | from confluence with Maple R. (S17, T83N, R44W, Monona Co.) to confluence with Big Cr. in Anthon in S4, T87N, R43W, Wood | Monona, Woodbury | 5p | bacteria |
| IA 06-LSR-02870-L_0 | Little Spirit Lake | Dickinson County, S8,T100N,R36W, 5 mi. NE of Montgomery. | Dickinson | 4a | algae, turbidity |
| IA 04-UDM-0315_2 | Lizard Creek | from west line, S5, T91N, R32W at east edge of Pocahontas (Pocahontas Co.) to headwaters in S20, T93N, R33W, Pocahontas | Pocahontas, Webster | 4d | fish kill |
| IA 06-LSR-02390-L_0 | Lost Island Lake | Palo Alto County, S31,T97N,R34W, 3 mi N of Ruthven. | Clay, Palo Alto | 5a | turbidity |
| IA 06-LSR-02805-L_0 | Lower Gar Lake | Dickinson County, S32,T99N,R36W, 2 mi. NE of Milford. | Dickinson | 4a | turbidity |
| IA 06-LSR-0115_0 | Maple Creek | mouth (S5, T91N, R39W, Cherokee Co.) to confluence with unnamed tributary in S1, T91N, R39W, Cherokee Co. | Cherokee | 4c | habitat alterations |
| IA 06-LSR-0080_2 | Maple River | from confluence with Silver Cr. (S13, T88N, R40W, Ida Co.) to confluence with Maple Cr. in S5, T91N, R39W, Cherokee Co. | Cherokee, Ida | 4c | habitat alterations |
| IA 06-LSR-0070_1 | Maple River | mouth (S17, T83N, R44W, Monona Co.) to confluence with unnamed tributary approximately 1 mile east of Danbury in SW 1/4, | Monona, Woodbury | 5p | bacteria |
| IA 06-LSR-0300_0 | Milford Creek | mouth (S14, T98N, R37W, Dickinson Co.) to confluence with unnamed tributary in S18, T98N, R36W, Dickinson Co. | Dickinson | 4a | biological; ammonia |
| IA 06-LSR-0305_0 | Milford Creek | from confluence with unnamed tributary (S18, T98N, R36W, Dickinson Co.) to outlet structure of Lower Gar Lake in NW 1/4, | Dickinson | 5a & 5b | biological |
| IA 06-LSR-0170_0 | Mill Creek | mouth (S14, T92N, R40W, Cherokee Co.) to confluence with Whisky Cr. at east line, S29, T94N, R41W, O'Brien Co. | Cherokee, O'Brien | 5b | biological |
| IA 06-WEM-0040_2 | Missouri River | from confluence with Elm Cr. (S18, T83N, R46W, Monona Co. at river mile 691.0 at Decatur, NE.) to confluence with Omaha | Monona, Woodbury | 4c | hydrological modification |
| IA 06-WEM-0040_3 | Missouri River | from confluence with Omaha Creek Ditch (SW 1/4, S6, T86N, R47W, Woodbury Co., at river mile 715.8 (near Browns Lake)) to | Woodbury | 4c | hydrological modification |
| IA 06-BSR-0095_0 | Moon Creek | mouth to headwaters | Lyon | 4d | fish kill: ammonia, low DO |
| IA 06-LSR-00805-L_0 | Moorhead Park Pond | Ida County, S10,T87N,R39W, 0.5 mi N of Ida Grove. | Ida | 5a | pH |
| IA 06-BSR-0080_0 | Mud Creek | mouth (S26, T98N, R46W, Lyon Co.) to the IA-MN state line | Lyon | 5b & 5p | biological; bacteria |
| IA 04-RAC-0050_2 | North Raccoon River | from County Road M54 (S24,T88N, R36W Sac Co.) to confluence with Drainage Ditch 101 in S36, T91N, R36W, Buena Vista Co. | Buena Vista, Sac | 5b & 5p | bacteria; biological |
| IA 04-RAC-0040_5 | North Raccoon River | from confluence with Camp Cr. (S7, T86N, R34W, Calhoun Co.) to confluence with Indian Cr. in S24, T87N, R36W, Sac Co. | Calhoun, Sac | 4a | bacteria; biological |
| IA 04-RAC-0040_6 | North Raccoon River | from confluence with Indian Cr. (S24, T87N, R36W, Sac Co.) to confluence with Cedar Cr. in S25, T88N, R36W, Sac Co. | Sac | 4a | bacteria; biological |
| IA 06-LSR-0250_0 | Ocheyedan River | mouth (S13, T96N, R37W, Clay Co.) to confluence with Little Ocheyedan R. in S28, T98N, R39W, Osecola Co. | Clay, O'Brien, Osceola | 5p | bacteria |
| IA 06-LSR-0101_0 | Odebolt Creek | From Unnamed Tributary in T87N R39W S24 to headwaters in Sac County. | Ida, Sac | 5b | fish kill |
| IA 06-BSR-0070_3 | Otter Creek | from the Lyon-Osceola county line (E line, S36, T98N, R43W, Lyon Co.) to confluence with unnamed tributary in S14, T99N, | Osceola | 5b | fish kill (low DO) |
| IA 06-BSR-0072_0 | Otter Creek | from confluence with unnamed tributary (S14, T99N,R42 W, Osceola Co.) to the Iowa/Minnesota state line | Osceola | 5b | fish kill |
| IA 06-BSR-0021_0 | Perry Creek | from mouth (S32, T89N, R47W, Woodbury Co.) to confluence with unnamed tributary in S35, T91N, R47W, Plymouth Co. | Plymouth, Woodbury | 5b | biological |
| IA 04-RAC-01695_0 | Poor Farm Creek | mouth (T91N R36W Sec 15, Buena Vista Co.) to headwaters in S34, T91N, R37W, Buena Vista Co. | Buena Vista | 5b | fish kill |
| IA 06-BSR-0030_0 | Rock River | mouth (S1, T95N, R48W, Sioux Co.) to confluence with Little Rock R. in S35, T98N, R46W, Lyon Co. | Lyon, Sioux | 5b & 5p | fish kill; bacteria |
| IA 06-BSR-0040_1 | Rock River | from confluence with Little Rock R. (S35, T98N, R46W, Lyon Co.) to confluence with Kanranzi Cr. in S28, T100N, R45W, Lyo | Lyon | 5p | bacteria |
| IA 06-BSR-0040_2 | Rock River | from confluence with Kanranzi Cr. (S28, T100N, R45W, Lyon Co.) to the IA/MN state line | Lyon | 5p | bacteria |
| IA 06-LSR-03105-L_0 | Silver Lake | Dickinson County, S28,T100N,R38W, near Lake Park. | Dickinson | 5a | turbidity |
| IA 04-UDM-01020-L_0 | Silver Lake | Palo Alto County, S20,T95N,R34W, 2 mi W of Ayrshire. | Palo Alto | 4a | algae, turbidity |
| IA 06-BSR-0029_0 | Sixmile Creek | mouth (S28,T94N, R48W, Sioux Co.) to confluence with unnamed tributary in S19, T95N, R46W, Sioux Co. | Sioux | 5a, 5b & 5 | ammonia; biological; bacteria |
| IA 06-LSR-0270_0 | Stony Creek | mo to trib S27,T98N,R38W Dickinson Co. | Clay, Dickinson | 5b | biological |
| IA 06-LSR-0271_0 | Stony Creek | Trib S27,T98N,R38W Dickinson Co. to Stony Lake | Dickinson | 5b | fish kill |
| IA 04-RAC-00530-L_0 | Storm Lake (incl Little Storm Lake) | Buena Vista County, S14,T90N,R37W, at Storm Lake. | Buena Vista | 4a | turbidity |
| IA 06-LSR-02450-L_0 | Trumbull Lake | Clay County, S27,T97N,R35W, 5 mi NE of Dickens. | Clay | 4a | algae, turbidity |
| IA 04-EDM-00290-L_0 | Tuttle Lake | Emmett County, S14,T100N,R32W, 2 mi. N of Dolliver. | Emmet | 4a | ammonia |
| IA 06-BSR-0065_0 | Unnamed Tributary to Little Rock River | mouth (T98N R44W Sec7 NE) to headwaters (T99N R44W Sec23 SE) Lyon Co | Lyon | 5b | fish kill (ammonia) |
| IA 06-BSR-0074_0 | Unnamed tributary to Otter Creek | from mouth (SW 1/4, S1, T98N, R42W, Osceola Co.) to headwaters in NW 1/4, S21, T99N, R42W, Osceola Co. | Osceola | 4d | fish kill |
| IA 06-LSR-01485_0 | Unnamed Tributary to Pierson Creek | mouth to headwaters | Plymouth, Woodbury | 4d | fish kill |
| IA 06-LSR-01487_0 | Unnamed Tributary to Unnamed Tributary to Pierson Creek | mouth to headwaters | Plymouth, Woodbury | 4d | fish kill |
| IA 06-LSR-02830-L_0 | Upper Gar Lake | Dickinson County, S29,T99N,R36W, at E edge of Arnolds Park. | Dickinson | 4a | algae, turbidity |
| IA 06-FLO-0040_0 | West Branch Floyd River | from confluence with Orange City Slough (S28, T94N, R45W, Sioux Co.) to confluence with unnamed tributary in NE 1/4, S18 | Sioux | 5b | biological |
| IA 06-LSR-0131_0 | West Fork Little Sioux River | confluence with unnamed tributary in S3, T91N, R42W, Cherokee Co. to headwaters | Cherokee | 5b | fish kill |
| IA 06-LSR-0120_1 | West Fork Little Sioux River | mouth (S12, T84N, R45W, Monona Co.) to confluence with a small, unnamed tributary near Climbing Hill in S16, T87N, R45W, | Monona, Woodbury | 5p | bacteria |
| IA 06-LSR-0120_2 | West Fork Little Sioux River | from confluence with small, unnamed tributary near Climbing Hill (S16, T87N, R44W, Woodbury Co.) to confluence with Mud | Woodbury | 5b | biological |
| IA 06-LSR-02840-L_2 | West Okoboji Lake | southwestern bay of West Okoboji Lake, in Sections 25, 26, 35, 36, T99N, R37W, Dickinson Co. | Dickinson | 5a | bacteria |
| IA 06-FLO-0065_0 | Willow Creek | from tributary in NE 1/4, S11, T93N, R44W, Plymouth Co. to headwaters. | O'Brien, Plymouth, Sioux | 5b | fish kill |
| IA 06-LSR-0223_0 | Willow Creek | mouth (S17, T94N, R36W, Clay Co.) to confluence with unnamed tributary in NW 1/4 S31, T95N, R37W, Clay Co. | Clay | 5b | biological; fish kill |
| IA 06-LSR-0224_0 | Willow Creek | from mouth (S15, T96N, 39W, O'Brien Co.) to confluence with unnamed tributary in S31, T95N, R37W, Clay Co. | Clay, O'Brien | 5b | fish kill: ammonia, low DO |
| IA 06-LSR-0150_0 | Willow Creek | mouth (S30, T90N, R41W, Cherokee Co.) to confluence with unnamed tributary in N 1/2, S31, T91N, R41W, Cherokee Co. | Cherokee | 5b | biological |