| NWSLI | Location Description |
| AFBI2 | FOX RIVER AT ALGONQUIN |
| ALGI2 | FOX RIVER AT ALGONQUIN |
| ALNI2 | MISSISSIPPI RIVER MEL PRICE LOCK & DAM #26 AT ALTON (LOWER) |
| ALOI2 | MISSISSIPPI RIVER AT ALTON |
| ALTI2 | MISSISSIPPI RIVER MEL PRICE LOCK & DAM #26 AT ALTON (UPPER) |
| APRI2 | APPLE RIVER AT HANOVER |
| ATWI2 | LAKE FORK AT ATWOOD |
| BBMI2 | BLACKBERRY CREEK NEAR MONTGOMERY |
| BEAI2 | ILLINOIS RIVER AT BEARDSTOWN |
| BISI2 | NORTH FORK VERMILION RIVER NEAR BISMARCK 2W |
| BMMI2 | BIG MUDDY RIVER AT MOUNT VERNON |
| BNDI2 | USCRN SITE AT UNIVERSITY OF ILLINOIS NEAR BONDVILLE 9SW |
| BNRI2 | BEAN RIDGE RAWS AT GRAND CHAIN |
| BONI2 | CASEY FORK SUBIMPOUNDMENT NEAR BONNIE |
| BROI2 | BONPAS CREEK AT BROWNS |
| BRSI2 | SHOAL CREEK NEAR BREESE |
| BRTI2 | BARTLETT WWTF AT BARTLETT |
| BSII2 | BIG MUDDY SUBIMPOUNDMENT AT BONNIE |
| BWDI2 | ADDISON CREEK AT BELLWOOD |
| BYRI2 | ROCK RIVER AT BYRON |
| CARI2 | LITTLE WABASH RIVER AT CARMI #2 |
| CAYI2 | CARLYLE LAKE NEAR CARLYLE |
| CDCI2 | DEER CREEK NEAR CHICAGO HEIGHTS 1NE |
| CDII2 | ILLINOIS RIVER AT LOCK & DAM AT DRESDEN ISLAND |
| CDLI2 | SANGAMON RIVER NEAR CHANDLERVILLE 1N |
| CFMI2 | CASEY FORK NEAR MOUNT VERNON |
| CHBI2 | IROQUOIS RIVER NEAR CHEBANSE 5E |
| CHKI2 | KICKAPOO CREEK NEAR CHARLESTON 4W |
| CHSI2 | MISSISSIPPI RIVER AT CHESTER |
| CIRI2 | OHIO RIVER AT CAIRO |
| CLAI2 | LITTLE WABASH RIVER NEAR CLAY CITY 5SE |
| CLFI2 | LAKE FORK NEAR CORNLAND 2NE |
| CLLI2 | CLINTON LAKE NEAR LANE 2NW |
| CLMI2 | LA MOINE RIVER NEAR COLMAR 1SSW |
| CMGI2 | EMBARRAS RIVER NEAR CAMARGO 1WSW |
| CMII2 | COPPER SLOUGH AT COBBLEFIELD ROAD NEAR CHAMPAIGN |
| CMOI2 | ROCK RIVER NEAR COMO |
| CNGI2 | MACKINAW RIVER NEAR CONGERVILLE 2NW |
| CODI2 | CRAB ORCHARD LAKE NEAR MARION 12W |
| COFI2 | EAST FORK SHOAL CREEK NEAR COFFEEN |
| COKI2 | KASKASKIA RIVER AT COOKS MILLS |
| COLI2 | MAZON RIVER NEAR COAL CITY 4W |
| COPI2 | ILLINOIS RIVER AT COPPERAS CREEK NEAR MANITO 7WNW |
| COWI2 | CRAB ORCHARD FIRE WEATHER RAWS |
| CPCI2 | PLUM CREEK NEAR CRETE |
| CREI2 | CRETE |
| CRII2 | LITTLE WABASH RIVER AT CARMI |
| CRLI2 | KASKASKIA RIVER AT LAKE CARLYLE TAILWATER AT CARLYLE |
| CRRI2 | SOUTH FORK SALINE RIVER NEAR CARRIER MILLS 4SW |
| CTMI2 | SUGAR CREEK NEAR CHATHAM 3ESE |
| CTVI2 | KASKASKIA RIVER AT CHESTERVILLE |
| CWDI2 | KASKASKIA RIVER NEAR COWDEN 2SE |
| DAYI2 | FOX RIVER AT DAYTON |
| DEWI2 | RAIN GAGE NEAR LE ROY |
| DKLI2 | DEVILS KITCHEN LAKE NEAR MARION 11WSW |
| DNVI2 | VERMILION RIVER NEAR DANVILLE (SEWAGE PLANT) |
| DRCI2 | DES PLAINES RIVER AT CHANNAHON |
| DRFI2 | NORTH BRANCH CHICAGO RIVER AT DEERFIELD |
| DSFI2 | DIXON SPRINGS RAWS |
| DSPI2 | DES PLAINES RIVER NEAR DES PLAINES |
| DXRI2 | ROCK RIVER AT DIXON |
| EANI2 | EAST ALTON PUMP STATION #1 NEAR EAST ALTON 2WSW |
| EDDI2 | LUSK CREEK NEAR EDDYVILLE |
| EDWI2 | CAHOKIA CREEK AT EDWARDSVILLE |
| EFFI2 | LITTLE WABASH RIVER NEAR EFFINGHAM 3WSW |
| EGVI2 | SALT CREEK NEAR ELK GROVE VILLA |
| EMHI2 | SALT CREEK AT ELMHURST |
| EWLI2 | ELWOOD |
| FARI2 | EAST FORK KASKASKIA RIVER NEAR FAIRMAN |
| FCKI2 | KASKASKIA RIVER BELOW FICKLIN |
| FDCI2 | FONDULAC CREEK NEAR EAST PEORIA 3NE |
| FEEI2 | PECATONICA RIVER NEAR FREEPORT |
| FICI2 | INDIAN CREEK NEAR FAIRBURY 2SSW |
| FKTI2 | FRANKFORT |
| FLOI2 | ILLINOIS RIVER AT FLORENCE |
| FLTI2 | MISSISSIPPI RIVER AT LOCK & DAM #13 AT FULTON |
| FMDI2 | FARM CREEK NEAR FARMDALE NEAR EAST PEORIA 4E |
| FMNI2 | CACHE RIVER AT FORMAN |
| FNKI2 | FRANKLINVILLE CREEK AT FRANKLINVILLE |
| FREI2 | SILVER CREEK NEAR FREEBURG |
| FYEI2 | KASKASKIA RIVER AT FAYETTEVILLE |
| GDTI2 | MISSISSIPPI RIVER AT GRAND TOWER |
| GDWI2 | GOODENOW RAIN |
| GENI2 | GREEN RIVER AT GENESEO |
| GLDI2 | MISSISSIPPI RIVER AT LOCK & DAM #18 NEAR GLADSTONE 4ESE |
| GLWI2 | THORN CREEK AT GLENWOOD |
| GNVI2 | MACKINAW RIVER NEAR GREEN VALLEY 3N |
| GOLI2 | OHIO RIVER LOCK AND DAM 51 AT GOLCONDA |
| GRCI2 | OHIO RIVER AT LOCK & DAM 53 AT GRAND CHAIN |
| GREI2 | SALT CREEK NEAR GREENVIEW 4N |
| GRFI2 | MISSISSIPPI RIVER AT POOL 26 NEAR GRAFTON |
| GRHI2 | GRANITE CITY LOCK 27 (POOL) |
| GRTI2 | GRANITE CITY LOCK 27 (TAILWATER) |
| GUNI2 | DES PLAINES RIVER NEAR GURNEE |
| HARI2 | ILLINOIS RIVER AT HARDIN |
| HAVI2 | ILLINOIS RIVER AT HAVANA POWER STATION NEAR HAVANA 1SSW |
| HBEI2 | RAIN GAGE AT HEBRON |
| HCKI2 | HICKORY CREEK NEAR BLUFF CITY |
| HEKI2 | RICHLAND CREEK NEAR HECKER |
| HEYI2 | LITTLE KICKAPOO CREEK NEAR HEYWORTH 4N |
| HGPI2 | HOMER GLEN |
| HNYI2 | ILLINOIS RIVER AT HENRY |
| HOFI2 | CROOKED CREEK NEAR HOFFMAN 2SW |
| HRBI2 | MIDDLE FORK SALINE RIVER NEAR HARRISBURG 2E |
| HRRI2 | HURRICANE CREEK NEAR MULBERRY GROVE |
| ILNI2 | MISSISSIPPI RIVER AT LOCK & DAM #16 NEAR ILLINOIS CITY 6 WNW |
| IRQI2 | IROQUOIS RIVER AT IROQUOIS |
| JHCI2 | HICKORY CREEK AT JOLIET |
| JHNI2 | FOX RIVER AT JOHNSBURG |
| JOLI2 | ILLINOIS RIVER AT BRANDON LOCK & DAM AT JOLIET |
| JOSI2 | ROCK RIVER NEAR JOSLIN |
| JRSI2 | DES PLAINES RIVER AT RUBY STREET BRIDGE AT JOLIET |
| KCAI2 | KASKASKIA RIVER AT CARLYLE |
| KCPI2 | KANKAKEE RIVER AT CUSTER PARK |
| KHBI2 | MISSISSIPPI RIVER AT KEITHSBURG |
| KNGI2 | ILLINOIS RIVER AT KINGSTON MINES |
| KNHI2 | KASKASKIA RIVER AT NAVIGATION LOCK & DAM (HEADWATER) NEAR ELLIS GROVE |
| KNLI2 | KASKASKIA RIVER AT NAVIGATION LOCK & DAM (TAILWATER) NEAR ELLIS GROVE 3SW |
| KRDI2 | KANKAKEE RIVER AT INFLOW OF POWER PLANT NEAR LORENZO |
| KSKI2 | KASKASKIA RIVER NEAR RAMSEY |
| LAWI2 | EMBARRAS RIVER NEAR LAWRENCEVILLE 1ESE |
| LCCI2 | LITTLE CROOKED CREEK NEAR NEW MINDEN 3W |
| LCSI2 | CHICAGO SANITARY AND SHIP CANAL NEAR LEMONT |
| LDLI2 | LANSING DITCH NEAR LANSING |
| LDRI2 | DES PLAINES RIVER AT LINCOLNSHIRE |
| LEMI2 | DES PLAINES RIVER NEAR LEMONT |
| LGLI2 | LITTLE GRASSY LAKE NEAR MARION 13WSW |
| LMTI2 | SAWMILL CREEK NEAR LEMONT |
| LNMI2 | SPOON RIVER NEAR LONDON MILLS 1NW |
| LNRI2 | VERMILION RIVER NEAR LEONORE |
| LOKI2 | ILLINOIS RIVER AT LOCKPORT LOCK AND DAM |
| LSLI2 | ILLINOIS RIVER AT LASALLE 1S |
| LYNI2 | DES PLAINES RIVER AT LYONS |
| MBNI2 | BOONE CREEK NEAR MC HENRY 2WSW |
| MBRI2 | BEAR CREEK NEAR MARCELLINE |
| MCOI2 | CRAB ORCHARD CREEK NEAR MARION |
| MCPI2 | MACOUPIN CREEK NEAR KANE |
| MCRI2 | WABASH RIVER AT MOUNT CARMEL |
| MDNI2 | NATALIE CREEK AT MIDLOTHIAN |
| MENI2 | SINSINAWA RIVER NEAR MENOMINEE 2E |
| MHHI2 | MANHATTAN |
| MILI2 | SUGAR CREEK AT MILFORD |
| MLII2 | ROCK RIVER NEAR MOLINE BRIDGE |
| MLNI2 | MILL CREEK AT MILAN |
| MMOI2 | ILLINOIS RIVER AT MARSEILLES LOCK & DAM #5 |
| MMPI2 | ILLINOIS RIVER MET STATION AT MARSAILLES LOCK & DAM #5 |
| MOMI2 | KANKAKEE RIVIER AT MOMENCE |
| MORI2 | ILLINOIS RIVER AT MORRIS |
| MOXI2 | AUX SABLE CREEK NEAR MORRIS |
| MOZI2 | MISSISSIPPI RIVER POOL 25 AT MOZIER LANDING |
| MRGI2 | KISHWAUKEE RIVER AT MARENGO |
| MROI2 | ILLINOIS RIVER AT MEREDOSIA |
| MRSI2 | ILLINOIS RIVER NEAR MARSAILLES (NO. 2) |
| MRYI2 | MARLEY CREEK AT MARLEY |
| MURI2 | BIG MUDDY RIVER AT MURPHYSBORO |
| NASI2 | KASKASKIA RIVER AT NEW ATHENS |
| NBAI2 | NORTH BRANCH CHICAGO RIVER AT ALBANY AVE AT CHICAGO |
| NBOI2 | MISSISSIPPI RIVER AT LOCK & DAM #17 NEAR NEW BOSTON 4NW |
| NBRI2 | WEST FORK OF NORTH BRANCH CHICAGO RIVER AT NORTHBROOK |
| NDRI2 | DUPAGE RIVER NEAR NAPERVILLE |
| NIPI2 | NIPPERSINK CREEK NEAR SPRING GROVE 1W |
| NLGI2 | ILLINOIS RIVER AT NEW LA GRANGE LOCK & DAM #8 NEAR BIG LAKE |
| NWBI2 | EDWARDS RIVER NEAR NEW BOSTON |
| OAKI2 | MIDLOTHIAN CREEK AT OAK FOREST |
| OBII2 | ILLINOIS RIVER LOCK & DAM AT OBRIEN NEAR BURNHAM |
| OBKI2 | SALT CREEK AT 22ND STREET AT OAKBROOK |
| OBLI2 | NORTH FORK EMBARRASS RIVER NEAR OBLONG 2W |
| OKBI2 | OAK BROOK PUMP STATION AT OAK BROOK |
| OKFI2 | SANGAMON RIVER NEAR OAKFORD 2NW |
| OKWI2 | MIDDLE FORK VERMILION RIVER NEAR OAKWOOD 2NE |
| OLMI2 | OLMSTED LOCK AND DAM |
| OQUI2 | HENDERSON RIVER NEAR OQUAWKA |
| ORII2 | EDWARDS RIVER NEAR ORION 3S |
| OTWI2 | ILLINOIS RIVER AT OTTAWA |
| OVMI2 | OHIO RIVER AT OLMSTED LOCK AND DAM VELOCITY |
| PCKI2 | POPE CREEK NEAR KEITHSBURG |
| PENI2 | ELKHORN CREEK NEAR PENROSE |
| PETI2 | SANGAMON RIVER AT PETERSBURG |
| PIAI2 | ILLINOIS RIVER AT PEORIA (BOAT YARD) |
| PINI2 | BIG BUREAU CREEK AT PRINCETON |
| PITI2 | BAY CREEK AT PITTSFIELD 1NNE |
| PLMI2 | BIG MUDDY RIVER AT PLUMFIELD |
| PMNI2 | PULLMAN CREEK AT PULLMAN |
| PNTI2 | VERMILION RIVER AT PONTIAC |
| POSI2 | KASKASKIA RIVER NEAR POSEY |
| PRAI2 | ILLINOIS RIVER AT PEORIA LOCK & DAM NEAR PEORIA 5SW |
| PRNI2 | SHOAL CREEK NEAR PIERRON 4E |
| PRYI2 | KISHWAUKEE RIVER AT PERRYVILLE |
| QLDI2 | MISSISSIPPI RIVER AT LOCK & DAM #21 NEAR QUINCY 2SSW |
| RCKI2 | MISSISSIPPI RIVER LOCK & DAM #15 AT ROCK ISLAND |
| RCSI2 | SOUTH FORK SANGAMON RIVER BELOW ROCHESTER 2NNW |
| REDI2 | KASKASKIA RIVER NEAR RED BUD |
| RFDI2 | ROCK RIVER ABOVE DAM AT ROCKFORD |
| RIPI2 | LA MOINE RIVER NEAR RIPLEY |
| RNDI2 | REND LAKE NEAR REND |
| ROCI2 | SOUTH FORK SANGAMON RIVER NEAR ROCHESTER 2W |
| ROKI2 | ROCK RIVER NEAR ROCKTON |
| ROMI2 | CHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE |
| RUSI2 | DES PLAINES RIVER NEW RUSSELL 1W |
| RVFI2 | DES PLAINES RIVER AT RIVER FOREST |
| RVRI2 | DES PLAINES RIVER AT RIVERSIDE |
| RVTI2 | SANGAMON RIVER AT RIVERTON |
| SAGI2 | CALUMET SAG CHANNEL NEAR LEMONT |
| SBNI2 | USCRN SITE AT NORTHERN ILLINOIS AGRONOMY RESEARCH CENTER NEAR SHABONNA 5NNE |
| SBUI2 | SALINE BRANCH NEAR URBANA |
| SBYI2 | LAKE SHELBYVILLE POOL NEAR SHELBYVILLE 1E |
| SELI2 | FOX RIVER AT SOUTH ELGIN |
| SEVI2 | SPOON RIVER AT SEVILLE NEAR MARIETTA 3ESE |
| SHLI2 | LITTLE CALUMET RIVER AT SOUTH HOLLAND |
| SHNI2 | OHIO RIVER AT OLD SHAWNEETOWN |
| SIRI2 | PECATONICA RIVER NEAR SHIRLAND 1ESE |
| SLVI2 | KASKASKIA RIVER NEAR SHELBYVILLE 2E |
| SMLI2 | OHIO RIVER AT SMITHLAND LOCK AND DAM NEAR HAMLETSBURG 2NE |
| SNAI2 | ILLINOIS RIVER NEAR SENECA 1SSW |
| SORI2 | DU PAGE RIVER AT SHOREWOOD |
| SPGI2 | SPRING BROOK AT 87TH STREET NEAR NAPERVILLE |
| SRCI2 | ROBINSON CREEK NEAR SHELBYVILLE 5W |
| SRDI2 | ILLINOIS RIVER AT STARVED ROCK LOCK & DAM #6 AT UTICA |
| SRSI2 | SANGAMON RIVER NEAR SPRINGFIELD 5NNE |
| SSJI2 | SPOON RIVER NEAR ST. JOSEPH |
| STII2 | CHICAGO SANITARY AND SHIP CANAL NEAR STICKNEY |
| STJI2 | SALT FORK NEAR ST. JOSEPH 3N |
| STMI2 | EMBARRAS RIVER AT STE. MARIE |
| SUGI2 | SUGAR CREEK NEAR SPRINGFIELD |
| THBI2 | MISSISSIPPI RIVER AT THEBES |
| THNI2 | THORN CREEK AT THORNTON |
| TRYI2 | SILVER CREEK NEAR TROY |
| UINI2 | MISSISSIPPI RIVER AT QUINCY |
| VALI2 | ILLINOIS RIVER AT VALLEY CITY |
| VDYI2 | KASKASKIA RIVER AT VENEDY STATION |
| VNDI2 | KASKASKIA RIVER AT VANDALIA |
| WAYI2 | KICKAPOO CREEK NEAR WAYNESVILLE 1NNW |
| WBDI2 | WEST BRANCH DU PAGE RIVER NEAR WEST CHICAGO |
| WBOI2 | WAUBONSEE CREEK NEAR OSWEGO |
| WDAI2 | INDIAN CREEK AT WANDA |
| WHCI2 | WHITLEY CREEK NEAR ALLENVILLE 3S |
| WHRI2 | WAUKEGAN HARBOR |
| WLMI2 | KANKAKEE RIVER NEAR WILMINGTON |
| WLSI2 | FLAG CREEK NEAR WILLOW SPRINGS |
| WMGI2 | MIDEWIN TALL GRASS PRAIRIE RAWS NEAR WILMINGTON 2NNE |
| WORI2 | WEST OKAW RIVER NEAR LOVINGTON 2NW |
| WRCI2 | RAYSE CREEK NEAR WALTONVILLE |
| WRNI2 | WEST BRANCH DU PAGE RIVER NEAR WARRENVILLE |
| WSCI2 | KRESS CREEK NEAR WEST CHICAGO 1S |
| WSDI2 | LICK CREEK NEAR WOODSIDE 2W |
| WSPI2 | SALT CREEK AT WESTERN SPRINGS |
| WTTI2 | WILTON CENTER |
| WYGI2 | INDIAN CREEK NEAR WYOMING 4SW |
| WYNI2 | SKILLET FORK RIVER NEAR WAYNE CITY |
| YKVI2 | FOX RIVER AT YORKVILLE |