| NWSLI | Location Description |
| ABTM1 | KINGSBURY STREAM AT ABBOT VILLAGE |
| ALLM1 | ALLAGASH RIVER NEAR ALLAGASH 2SW |
| ANDM1 | NERON SITE AT ANDOVER |
| ANPM1 | MCFARLAND HILL RAWS |
| APWM1 | ACADIA NP GROUNDWATER WELL NEAR BAR HARBOR 2W (IHW171) |
| AUBM1 | ANDROSCOGGIN RIVER NEAR AUBURN |
| AUGM1 | KENNEBEC RIVER AT FATHER CURRAN BRIDGE AT AUGUSTA |
| AWWM1 | AMHERST 1W GROUNDWATER WELL (HW1A) |
| BARM1 | ST. CROIX RIVER AT BARING |
| BBRM1 | BIG BLACK RIVER NEAR CLAYTON LAKE 23NW |
| BBWM1 | WEST BRANCH BEAR BROOK NEAR BEDDINGTON NEAR AMHERST 11E |
| BHWM1 | CROOKED ROAD GROUNDWATER WELL NEAR BAR HARBOR 3NW (HW172) |
| BINM1 | KENNEBEC RIVER AT BINGHAM |
| BLAM1 | PISCATAQUIS RIVER AT BLANCHARD NEAR MONSON 4ENE |
| BLDM1 | NERON SITE AT PENOBSCOT BALD MOUNTAIN NEAR ALEXANDER 21W |
| BTHM1 | NERON SITE AT BATH |
| CFDM1 | NARRAGUAGUS RIVER AT CHERRYFIELD |
| CLTM1 | NERON SITE AT CLAYTON LAKE |
| CNHM1 | SACO RIVER AT CORNISH |
| CWWM1 | WELL WW796 NEAR CALAIS 1WSW |
| DANM1 | NERON SITE AT DANFORTH |
| DEBM1 | NARRAGUAGUS RIVER AT DEBLOIS |
| DICM1 | ST.JOHN RIVER AT DICKEY |
| DIXM1 | NERON SITE AT DIXMONT |
| DOVM1 | PISCATAQUIS RIVER NEAR DOVER-FOXCROFT 5W |
| DVLM1 | DENNYS RIVER AT DENNYSVILLE |
| EDDM1 | PENOBSCOT RIVER AT EDDINGTON |
| EGLM1 | NERON SITE AT EAGLE LAKE |
| EPOM1 | NERON SITE AT EASTPORT |
| EPPM1 | PLEASANT RIVER NEAR EPPING |
| FIHM1 | FISH RIVER NEAR FORT KENT |
| FKWM1 | FORT KENT 1SSW GROUNDWATER WELL (ARW890) |
| FOXM1 | NERON SITE AT FOXBROOK |
| FRKM1 | KENNEBEC RIVER AT THE FORKS |
| FTKM1 | ST. JOHN RIVER BELOW FISH RIVER AT FORT KENT |
| FXXM1 | FOX BROOK #2 NEAR ASHLAND 21W |
| GDRM1 | COBBOSSEECONTEE STREAM AT GARDINER |
| GILM1 | WILD RIVER AT GILEAD |
| GIRM1 | KENNENEC RIVER AT GARDINER |
| GLSM1 | GRAND LAKE STREAM AT GRAND LAKE |
| GRDM1 | GRAND RIVER DAM NEAR VAN BUREN 15NE (N.B.) |
| GRNM1 | EAST BRANCH PENOBSCOT RIVER AT GRINDSTONE |
| HDLM1 | HADLOCK BROOK NEAR BAR HARBOR 5SW |
| HOLM1 | NERON SITE AT HOLLIS |
| HRTM1 | NERON SITE AT HARTFORD |
| HWWM1 | HADLEY LAKES GROUNDWATER WELL NEAR BEDDINGTON 10E (WW797) |
| JONM1 | NERON SITE AT JONESBORO |
| KKJM1 | NERON SITE AT KOKADJO |
| KNBM1 | KINGSBURY RAIN NEAR PARKMAN 9W |
| KNCM1 | NERON SITE AT KNOWLES CORNER |
| KWWM1 | KENDUSKEAG 1S WELL (PEW456) |
| LDSM1 | DEAD RIVER AT LEEDS |
| LIBM1 | LIBBY BROOK NEAR NORTHFIELD NEAR COLUMBIA FALLS 9N |
| LINM1 | DUCKTRAP RIVER NEAR LINCOLNVILLE 4NW |
| LIZM1 | CRN SITE AT AROOSTOOK NWR NEAR LIMESTONE 4NNW |
| MACM1 | MACHIAS RIVER AT WHITNEYVILLE |
| MASM1 | AROOSTOOK RIVER NEAR MASARDIS 1N |
| MATM1 | MATTAWAMKEAG RIVER AT MATTAWAMKEAG |
| MERM1 | SANDY RIVER NEAR MERCER 2N |
| MFDM1 | PISCATAQUIS RIVER AT MEDFORD |
| MOUM1 | MOUSAM RIVER AT ROUTE 4 NEAR SANFORD |
| MWRM1 | MOOSEHORN NWR RAWS NEAR CALAIS 5S |
| MWWM1 | MILLINOCKET 11WSW GROUNDWATER WELL (PEW594) |
| MXGM1 | MEDUXNEKEAG RIVER NEAR HOULTON 1S |
| MXKM1 | MEDUXNEKEAG RIVER NEAR HOULTON 1S |
| MXLM1 | MEDUXNEKEAG RIVER AT LOWERY ROAD NEAR HOULTON 4N |
| NANM1 | CARRABASSETT RIVER NEAR NORTH ANSON |
| NINM1 | ST. JOHN RIVER NEAR NINEMILE BRIDGE 11NW |
| NWFM1 | SHEEPSCOT RIVER AT NORTH WHITEFIELD |
| NWSM1 | NERON SITE AT NEW SHARON |
| OLDM1 | CRN SITE NEAR OLD TOWN 1NW |
| OTRM1 | OTTER CREEK NEAR BAR HARBOR 4S |
| OXBM1 | NERON SITE AT OXBOW NEAR ASHLAND 17SSW |
| PATM1 | NERON SITE AT PATTEN |
| PHRM1 | WILLIAMS BROOK AT PHAIR |
| PITM1 | SEBASTICOOK RIVER NEAR PITTSFIELD 5S |
| PIWM1 | PRESQUE ISLE 1ENE GROUNDWATER WELL (ARW906) |
| PNNM1 | NERON SITE AT PRINCETON |
| POLM1 | NERON SITE AT POLAND |
| PTFM1 | NERON SITE AT PITTSTON FARM NEAR ROCKWOOD 20NW |
| RCWM1 | RACHEL CARSON RAWS |
| RGLM1 | NERON SITE AT RANGLEY |
| RIPM1 | NERON SITE AT RIPOGENOIS DAM |
| RMFM1 | ANDROSCOGGIN RIVER AT RUMFORD |
| ROXM1 | SWIFT RIVER NEAR ROXBURY |
| SADM1 | ELLIS RIVER AT SOUTH ANDOVER |
| SBMM1 | NORTH BRANCH PENOBSCOT RIVER NEAR SEBOOMOOK 12NW |
| SBOM1 | STONY BROOK AT EAST SEBAGO |
| SBSM1 | SEBOEIS RIVER NEAR SHIN POND |
| SHRM1 | SHIRLEY RAIN AT SHIRLEY MILLS |
| SHZM1 | SUNKHAZE MEADOWS NWR RAWS NEAR MILFORD 3NE |
| SIDM1 | KENNEBEC RIVER AT NORTH SIDNEY |
| SMBM1 | SMITH BROOK NEAR ASHLAND 27WSW |
| SPEM1 | SPENCER STREAM AT MOUTH NEAR GRAND FALLS NEAR CARATUNK 12NW |
| SPSM1 | LITTLE ANDROSCOGGIN RIVER NEAR SOUTH PARIS |
| STAM1 | ST. AURELIE NEAR JACKMAN 41N |
| STDM1 | SEBAGO LAKE AT STANDISH |
| TCRM1 | NEZINSCOT RIVER AT TURNER CENTER |
| TNBM1 | TURNER BROOK RAWS NEAR BAKER LAKE 4ENE |
| TURM1 | NERON SITE AT TURNER |
| VBOM1 | ST. CROIX RIVER AT VANCEBORO |
| WBKM1 | PRESUMPSCOT RIVER AT WESTBROOK |
| WENM1 | PENOBSCOT RIVER AT WEST ENFIELD |
| WEQM1 | NERRS WATER QUALITY SITE WELLS RESERVE IN WELLS |
| WEXM1 | NERRS METEOROLOGICAL SITE AT WELLS RESERVE |
| WOOM1 | BACK RIVER CREEK AT PLEASANT COVE NEAR WOOLWICH |
| WRKM1 | NERON SITE AT WEST ROCKPORT |
| WSHM1 | AROOSTOOK RIVER NEAR WASHBURN 1S |
| WSLM1 | RIVER GAUGE ON OLD STREAM NEAR WESLEY |
| WTPM1 | NERON SITE NEAR WINTERPORT 1N |