| WBID | Waterbody | Location | County(s) | IR Category | Impairment(s) |
| IA 02-WFC-0110_0 | Bailey Creek | mouth (NE 1/4, S19, T93N, R19W, Franklin Co.) to confluence with unnamed tributary in S16, T94N, R22W, Cerro Gordo Co. | Cerro Gordo, Franklin | 5b-t | biological-fish/inverts |
| IA 02-CED-0410_2 | Beaver Creek | from confluence with North Beaver Cr. (S23, T90N, R18W, Butler Co) to confluence with unnamed tributary in SE 1/4, S29, | Butler, Franklin | 5b-t | biological-fish/inverts |
| IA 02-CED-0400_0 | Beaver Creek | mouth (S34, T90N, R14W, Black Hawk Co.) to confluence with South Beaver Cr. in S25, T90R, R17W, Butler Co. | Black Hawk, Butler | 5a | bacteria |
| IA 02-IOW-0290_0 | Beaver Creek | mouth (SE 1/4 S25 T87N R19W Hardin Co.) to confluence with South Beaver Cr. in NE 1/4 S28 T88N R20W Hardin Co. | Hardin | 5p | bacteria |
| IA 02-WIN-0081_0 | Beaver Creek | from confluence with DD54 in T98N R23W S25 Winnebago Co. to outlet structure at Rice Lake T99N R22W S19 Worth Co. | Winnebago | 5p | low DO |
| IA 02-IOW-0295_0 | Beaver Creek | from confluence with South Beaver Creek (NE1/4 S28 T88N R20W) to headwaters (S28 T89N R21W Hardin Co.) | Hardin | 5p | bacteria |
| IA 02-WFC-0090-L_0 | Beeds Lake | Franklin County S20T92NR20W 2 mi W 1 mi N of Hampton | Franklin | 5a & 4a | algae; bacteria |
| IA 02-CED-0380_0 | Black Hawk Creek | from N. Fk. Black Hawk Cr. (S1, T87N, R15W, Grundy Co.) to confluence with unnamed tributary in S12, T87N, R18W, Grundy | Grundy | 5p | bacteria |
| IA 04-UDM-01880-L_0 | Briggs Woods Lake | Hamilton County S17T88NR25W near Webster City. | Hamilton | 5a & 5b | algae; biological-fish kill |
| IA 04-EDM-0090_2 | Buffalo Creek | from confluence with Union Slough Outlet (S9, T97N, R28W, Kossuth Co.) to confluence with Little Buffalo Cr. in S4, T97N | Kossuth | 5b-t | biological-fish/inverts |
| IA 04-EDM-0090_3 | Buffalo Creek | confluence with Little Buffalo Cr.(S4, T97N, R27W, Kossuth Co.) to confluence with Drainage Ditch 48 in S33, T98N, R26W, | Hancock, Kossuth, Winnebago | 5b-t | biological-fish/inverts |
| IA 02-CED-0490_1 | Burr Oak Creek | mouth (S12, T98N, R16W, Mitchell Co.) to Mitchell County Road T46 at W line, S10, T98N, R16W, Mitchell Co. | Mitchell | 5b-t | biological-fish/inverts |
| IA 04-UDM-0247_0 | Buttermilk Creek | mouth (T92N, R26W, Sec 33) to headwaters (T92N, R26W, Sec 34), Wright County | Wright | 5p | bacteria |
| IA 02-WIN-0050_0 | Calmus Creek | mouth (S34, T97N, R20W, Cerro Gordo Co.) to west line S30, T97N, R20W, Cerro Gordo Co. | Cerro Gordo | 5b-t | biological-fish/inverts |
| IA 02-CED-0110_3 | Cedar River | from Rock Cr. nr Orchard (S24, T97N, R17W, Floyd Co.) to Iowa / Minnesota state line (S8, T100N, R18W, Mitchell Co.) | Floyd, Mitchell | 5a | biological-mussels; mercury (in fish) |
| IA 02-CED-0110_1 | Cedar River | from upper end of Nahsua Impoundment (Chickasaw/Floyd county line (W line, S7, T94N, R14W, Chickasaw Co.)) to Dam No. 2 | Floyd | 5a | bacteria |
| IA 02-CED-0110_2 | Cedar River | from Charles City Dam No. 2 (NW 1/4, NE 1/4, S12, T95N, R16W, Floyd Co.) to confluence with Rock Cr. in S24, T97N, R17W, | Floyd | 5a | mercury (in fish) |
| IA 02-WIN-00450-L_0 | Clear Lake | Cerro Gordo County S13T96NR22W at Clear Lake. | Cerro Gordo | 5a & 4a | bacteria; algae; turbidity |
| IA 02-IOW-04095-L_0 | Crystal Lake | Hancock County S15T97NR25W at Crystal Lake. | Hancock | 5a | bacteria; organic enrichment |
| IA 02-CED-0540_1 | Deer Creek | mouth (S23, T99N, R18W, Mitchell Co.) to the Mitchell-Worth county line (west line S6, T100N, R18W, Mitchell Co.) | Mitchell | 5p | bacteria |
| IA 04-UDM-0070_0 | Des Moines River | from confluence with East Fork Des Moines R. (S19, T91N, R28W, Humboldt Co.) to Humboldt Dam at Lake Nokomis at Humboldt | Humboldt | 5a | bacteria |
| IA 04-UDM-0030_2 | Des Moines River | from Fraser Dam (S34, T85N, R27W, Boone Co.) to confluence with the Boone R. in SE 1/4, S25, T87N, R27W, Webster Co. | Boone, Hamilton, Webster | 5a | bacteria |
| IA 04-UDM-0040_1 | Des Moines River | from confluence with Boone R. (S25, T87N, R27W, Webster Co.) to west line of S15, T88N, R28W, Webster Co. (approximately | Webster | 5a | bacteria |
| IA 04-UDM-0040_2 | Des Moines River | from the west line of S15, T88N, R28W (Webster Co.) to the dam of the Ft. Dodge impoundment. | Webster | 5a | bacteria |
| IA 04-UDM-0240_2 | Eagle Creek | DD 9->L Eagle Cr S9T91NR25W Wright Co | Wright | 4d | fish kill-restitution sought/received |
| IA 02-IOW-0380_1 | East Branch Iowa River | mouth (S19,T93N, R23W, Wright Co.) to confluence with unnamed tributary in S16, T94N, R23W, Hancock Co., north of Goodel | Hancock, Wright | 5b-t | biological-fish/inverts |
| IA 04-EDM-0010_1 | East Fork Des Moines River | mouth (Humboldt Co.) to Hwy 169 at Devine Access in S26, T94N, R29W, Kossuth Co. | Humboldt, Kossuth | 4a | bacteria |
| IA 04-EDM-0010_2 | East Fork Des Moines River | from Hwy 169 at Devine Access (S26, T94N, R29W, Kossuth Co.) to County Road B63 (130th) (S23 T94N, R29W Kossuth Co) | Kossuth | 4a | bacteria |
| IA 04-EDM-0010_3 | East Fork Des Moines River | from County Road B63 (aka 130th) (S23 T94N R29W Kossuth Co) to outfall of the Algona wastewater treatment plant (WWTP) | Kossuth | 4a | bacteria |
| IA 02-IOW-03830-L_0 | Eldred Sherwood Lake | Hancock County S21T94NR24W 3 mi. NE of Goodell. | Hancock | 5a | algae; bacteria |
| IA 02-SHL-0021_0 | Flood Creek | mouth (S27, T93N, R16W, Butler Co.) to confluence with Beaver Cr. in S36, T95N, R17W, Floyd Co. | Butler, Floyd | 5p | bacteria |
| IA 02-CED-0385_0 | Holland Creek | mouth (S35, T88N, R17W, Grundy Co.) to confluence with unnamed tributary in S29, T88N, R17W, Grundy Co. | Grundy | 5p | bacteria |
| IA 02-IOW-0080_2 | Iowa River | from confluence with Drainage Ditch No. 3 (aka Wheeler Cr.) in NW 1/4, SE 1/4, S10, T91N, R23W, Wright Co., to the Hwy 6 | Wright | 5a | bacteria |
| IA 02-IOW-0070_3 | Iowa River | from confluence with South Fork Iowa R. (S25, T87N, R20W, Hardin Co.) to confluence with Pine Cr. in S8, T87N, R19W, Har | Hardin | 5a | bacteria |
| IA 04-UDM-02290-L_0 | Lake Cornelia | Wright County S16T92NR24W at Cornelia. | Wright | 4a | algae; turbidity |
| IA 04-EDM-00610-L_0 | Lake Smith | Kossuth County S36T96NR29W 3 mi. N of Algona. | Kossuth | 4a | noxious aquatic plants |
| IA 04-EDM-0100_0 | Little Buffalo Creek (aka North Buffalo Cr.) | mouth (S4, T97N, R27W, Kossuth Co.) to confluence with unnamed tributary in S5, T98N, R26W, Winnebago Co. | Kossuth, Winnebago | 4c | habitat alterations |
| IA 04-UDM-02415_0 | Little Eagle Creek | from mouth (T91N R25W Sec9) to headwaters (T93N R25W Sec36) | Wright | 4d | fish kill-restitution sought/received |
| IA 03-SSK-00360-L_0 | Little Wall Lake | Hamilton County S10T86NR24W 1 mi. S of Jewell | Hamilton | 4a | algae; turbidity |
| IA 04-UDM-0300_1 | Lizard Creek | mouth to confluence with unnamed tributary in N 1/2, S31, T90N, R30W, Webster Co. | Webster | 5b & 5p | bacteria; biological-fish/inverts |
| IA 03-SSK-0090_0 | Long Dick Creek | mouth (S18, T85N, R23W, Story Co.) to N. line of S34, T86N, R23W, Hamilton Co. | Hamilton, Story | 5b-t | biological-fish/inverts |
| IA 03-SSK-0091_0 | Long Dick Creek | N. line of S34, T86N, R23W, Hamilton Co to headwaters | Hamilton | 5b | biological-fish kill |
| IA 04-EDM-0041_0 | Lotts Creek | DD79 in T94N R30W Sec 15 SE | Kossuth | 5b | biological-fish kill |
| IA 02-IOW-0330-L_0 | Lower Pine Lake | Hardin County S4T87NR19W 0.5 mi E of Eldora. | Hardin | 5a & 4a | bacteria; organic enrichment |
| IA 04-UDM-0215_0 | Lyons Creek | mouth (NW 1/4, S6, T88N, R25W, Hamilton Co.) to headwaters in S18, T89N,R24W, Hamilton Co. | Hamilton | 5b & 5p | bacteria; biological-fish kill |
| IA 02-CED-0432_1 | Middle Fork South Beaver Creek | mouth (N 1/2, S28, T89N, R17W, Grundy Co.) confluence with unnamed tributary in NE 1/4, S28, T89N, R18W, Grundy Co. (ups | Grundy | 4a | nutrients; siltation |
| IA 02-CED-0383_0 | North Black Hawk Creek | mouth (S1, T87N, R15W, Grundy Co.) to confluence with unnamed tributary in S8, T88N, R15W, Grundy Co. | Grundy | 5p | bacteria |
| IA 02-CED-0550_0 | Otter Creek | mouth (S21, T100N, R18W, Mitchell Co.) to Iowa/Minnesota line at N line, S11, T100N, R18W, Mitchell Co. | Mitchell | 5p | bacteria |
| IA 02-SHL-00235_0 | Palmer Creek | mouth (NW 1/4, S29, T93N, R16W, Butler Co.) to headwaters in S32, T93N, R17W, Butler Co.. | Butler | 5b | biological-fish kill |
| IA 02-CED-0510_1 | Rock Creek | mouth (S24, T97N, R17W, Floyd Co.) to confluence with unnamed tributary in NW 1/4, SE 1/4, S17, T97N, R17W, Mitchell Co. | Floyd, Mitchell | 5p | bacteria |
| IA 02-IOW-0342_0 | School Creek | mouth (S28, T89N, R20W, Hardin Co.) to confluence with unnamed tributary in S16, T89N, R20W, Hardin Co. | Hardin | 4d | fish kill-restitution sought/received |
| IA 02-SHL-0020_2 | Shell Rock River | from confluence with Rose Cr. (NW 1/4 S8 T97N R19W Cerro Gordo Co.) to the Iowa/Minnesota state line. | Worth | 5a | bacteria |
| IA 02-SHL-00295-L_0 | Silver Lake | Worth County S14T100NR22W 8 mi. N of Joice. | Worth | 4a | algae; turbidity |
| IA 04-UDM-0170_0 | Skillet Creek | mouth (S16, T86N, R27W, Webster Co.) to confluence with unnamed tributary in NW 1/4, SE 1/4, S14, T86N, R28W, Webster Co | Webster | 5b-t | biological-fish/inverts |
| IA 02-IOW-0297_0 | South Beaver Creek | from mouth (NE 1/4 S28 T88N R20W Hardin Co.) to headwaters (S5 T88N R21W Hardin Co.) | Hardin | 5p | bacteria |
| IA 02-IOW-0280_4 | South Fork Iowa River | from confluence with unnamed tributary in E 1/2 S11 T88N R22W Hardin Co. to confluence with unnamed tributary in NE 1/4 S32 T89N R22W Hardin Co. | Hardin | 5p | bacteria |
| IA 02-IOW-0280_5 | South Fork Iowa River | from confluence with unnamed tributary in NE 1/4 S32 T89N R22W Hardin Co. to confluence with unnamed tributary in SE 1/4 S35 T90N R23W Wright Co. | Hardin | 5p | bacteria |
| IA 02-IOW-0282_0 | South Fork Iowa River | from confluence with unnamed tributary (S35 T90N R23W Wright Co.) to headwaters in S24 T89N R24W Hamilton Co. | Hamilton | 5p | bacteria |
| IA 02-IOW-0270_0 | South Fork Iowa River | mouth (S4 T86N R19W Hardin Co.) to confluence with Tipton Cr. in S21 T87N R20W Hardin Co. | Hardin | 5p | bacteria |
| IA 02-IOW-0280_3 | South Fork Iowa River | from confluence with unnamed tributary in W 1/2 S19 T88N R21W Hardin Co. to confluence with unnamed tributary in E 1/2 S11 T88N R22W Hardin Co. | Hardin | 5p | bacteria |
| IA 03-SSK-0030_3 | South Skunk River | from the north line of S6, T85, R23W, Story Co (approximately 1 mile NNE of Story City) to confluence with Drainage Ditc | Hamilton, Story | 5b-t | biological-fish/inverts |
| IA 02-CED-0520_0 | Spring Creek | mouth (S13, T97N, R17W, Mitchell Co.) to N line S8, T97N, R16W, Mitchell Co. | Mitchell | 5a & 5p | bacteria; low DO |
| IA 02-IOW-0300_1 | Tipton Creek | mouth (S21 T87N R20W Hardin Co.) to confluence with unnamed tributary in SE 1/4 S17 T87N R21W Hardin Co. | Hardin | 5p | bacteria |
| IA 02-IOW-0300_2 | Tipton Creek | from confluence with unnamed tributary (SE 1/4 S17 T87N R21W Hardin Co.) to confluence with New York Branch in S32 T88N R22W Hardin Co. | Hardin | 5p | bacteria |
| IA 02-CED-0530_0 | Turtle Creek | mouth (S23, T99N, R18W, Mitchell Co.) to E line S7, T99N, R17W, Mitchell Co. | Mitchell | 5p | bacteria |
| IA 02-CED-0505_1 | Unnamed Creek (aka Drainage Ditch 3) | mouth (SW 1/4, S1, T95N, R16W, Floyd Co.) to confluence with unnamed tributary in T95N R16W Sec 4, Floyd Co. | Floyd | 5a | biological-fish kill |
| IA 02-IOW-02611_0 | Unnamed tributary to Drainage Ditch 55 | mouth to headwaters | Hardin | 5b | biological-fish kill |
| IA 04-UDM-02417_0 | Unnamed Tributary to Little Eagle Creek | from mouth (T92N R25W Sec34) to headwaters (T92N R25W Sec35) | Wright | 4d | fish kill-restitution sought/received |
| IA 03-SSK-0130_0 | Unnamed Tributary to South Skunk River | from mouth (T86N R24W Sec24) to headwaters (T86N R23W Sec17) | Hamilton | 4d | fish kill-restitution sought/received |
| IA 02-WFC-0150_0 | Unnamed Tributary to West Fork Cedar River | mouth to headwaters, Franklin Co | Franklin | 4d | fish kill-restitution sought/received |
| IA 02-IOW-0335-L_0 | Upper Pine Lake | Hardin County S4T87NR19W 0.5 mi E of Eldora. | Hardin | 5a & 4a | algae; siltation |
| IA 02-WIN-00465-L_0 | Ventura Marsh | Cerro Gordo County S19T96NR22W at Ventura. | Cerro Gordo, Hancock | 4a | algae; turbidity |
| IA 01-WPS-0030_5 | Wapsipinicon River | from town of McIntyre (S34, T100N, R15W, Mitchell Co.) to north line of S20, T100N, R15W, Mitchell Co. | Mitchell | 5b-v | biological-fish/inverts & fish kill |
| IA 02-WFC-0020_1 | West Fork Cedar River | from confluence with Shell Rock R. (S4, T90N, R14W, Black Hawk Co.) to confluence with Maynes Cr. in S7, T91N, R17W, But | Black Hawk, Butler | 5p | bacteria |
| IA 04-UDM-0253_1 | West Otter Creek | mouth (S31, T93N, R25W, Wright Co.) to the Wright-Hancock county line (north line, S4, T93N, R25W, Wright Co. | Wright | 5b | biological-fish kill |
| IA 02-WIN-0020_2 | Winnebago River | from confluence with Pike Run (S25, T99N, R24W, Winnebago Co.) to the Iowa/Minnesota state line | Winnebago | 5b-t | biological-fish/inverts |
| IA 02-WIN-0010_2 | Winnebago River | from confuence with Calmus Cr. (S34, T97N, R20W, Cerro Gordo Co.) to mill dam at Fertile in S34, T98N, R22W, Worth Co. | Cerro Gordo, Worth | 5a | bacteria |
| IA 02-WIN-0010_1 | Winnebago River | mouth (Floyd Co.) to confluence with Calmus Cr. at Mason City in S34, T97N, R20W, Cerro Gordo Co. | Cerro Gordo, Floyd | 5a | bacteria |
| IA 02-WIN-0020_1 | Winnebago River | from upper end of mill pond at Fertile to confluence with Pike Run in S25 T99N R24W Winnebago Co. | Cerro Gordo, Hancock, Winnebago | 5b | biological-fish kill |