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(Click for frequent words.) 77 Sewage spill 70 Fisherman drowns 69 Toxic algae 68 Kayaker rescued 67 Algae bloom 67 Sewage overflow 67 Swimmer drowns 66 Sewage overflows 66 Wreck Pond 65 Polluted runoff 65 leaky septic tanks 65 raw sewage spilling 65 Teenager drowns 65 silt buildup 65 leaking septic tanks 65 Woman drowns 65 Boy drowns 64 Algae blooms 64 Ponding 64 sewage spills 64 wastewater overflows 64 Discolored water 63 Untreated sewage 63 Body washes ashore 63 Whale carcass 63 untreated sewage flowed 63 Body Found Floating 63 Algal bloom 63 sewage discharges 63 toxic algae blooms 63 untreated sewage spilled 62 Toddler drowns 62 toddler drowns 62 Rockslides 62 Flood Warning Issued 62 Raw sewage 61 fecal coliform contamination 61 toxic algal blooms 61 Copter crashes 61 raw sewage flowed 61 canoe capsizes 61 Coal train derails 60 Localized flooding 60 Sewage Spill 60 Fecal coliform bacteria 60 Decomposed body found 60 raw sewage spilled 60 sewer outfalls 60 sewage overflowed 60 Bayou Texar 60 Agua Hedionda 60 dumps raw sewage 60 ICE HOUSE RESERVOIR 60 sewage overflows 60 Missing boater 60 Groundwater contamination 60 creek empties 60 Prescribed burn planned 60 Chlorine leak 59 Siltation 59 Storm drenches 59 dump raw sewage 59 Drowning Victim Identified 59 Blowing dust 59 Sewage Spill Closes 59 Whooping cough outbreak 59 Teenager Drowns 59 Boat capsizes 59 Honker Bay 59 Rattlesnake bites 59 avian botulism 59 Freight train derails 59 raw sewage discharges 59 Fecal bacteria 59 Icy patches 59 Camanche Reservoir 59 Man Body Recovered 59 Storm wreaks havoc 59 Georgiana Slough 59 freshwater streams 59 Treated wastewater 58 Midport Road Port 58 Dangerous rip currents 58 Fecal coliform 58 Haystack Reservoir 58 Sewer overflows 58 Birders flock 58 silt laden 58 Freezing temps 58 Upper Floridan Aquifer 58 spilling raw sewage 58 Landslips 58 Farther upstream 58 Pismo Beach Pier 58 Tacoma Commencement 58 raw sewage flowing 58 Excess nutrients 58 Boater Missing 58 Chiquito Creek 58 polluted stormwater 58 Wayward whales 58 Wildfire Forces Evacuations 58 untreated raw sewage 58 Katama Bay 58 Seepage 58 Watermain break 58 untreated wastewater spilled 58 Truck overturns 58 Gunlock Reservoir 58 Teen Drowns 58 harmful algae blooms 57 Overturned tanker 57 Kawkawlin River 57 San Justo Reservoir 57 Algal blooms 57 sewage outfall 57 sewage overflow 57 Small Quake Rattles 57 Winchuck 57 inundating farmland 57 Bayou Grande 57 nitrate contamination 57 Conimicut Point 57 raw sewage spills 57 Rockslide closes 57 Pilchuck River 57 Lake Tenkiller Area 57 Ballona Creek 57 Boaters beware 57 Rabid bat 57 polluted stormwater runoff 57 New Zealand mudsnails 57 Dogfish Creek 57 whale washes ashore 57 raw sewage 57 Nacimiento Dam 57 Flooding closes 57 Radioactive contamination 57 Stampede Reservoir 57 Stormwater runoff 57 Clogged gutters 57 Powhatan Landing 57 Mudslide closes 57 Contaminated groundwater 57 Train derailment 57 Delaware Inland Bays 57 Pounding rains 57 clogged culvert 57 Kilchis 57 coliform contamination 57 Tujunga Wash 57 dumping raw sewage 56 Skinny dippers 56 BOCA LAKE 56 geese droppings 56 Mispillion River 56 Branched Oak 56 Teen drowns 56 shellfish harvested 56 Snow dusts 56 freshwater aquifer 56 Lake Kaweah 56 Body Recovered From 56 invasive zebra mussels 56 shellfish harvests 56 discharging raw sewage 56 Rabid bats 56 Wickiup Reservoir 56 Batiquitos Lagoon 56 Necanicum River 56 Small Earthquake Rattles 56 Man drowns 56 Drownings 56 Cullasaja River 56 Storms pelt 56 Overturned semi 56 Hominy Creek 56 Tanker spills 56 Car Plunges Into 56 Wildfire erupts 56 creeks rivers 56 Floods recede 56 Sewage Spills 56 Lake Loramie 56 noxious algae blooms 56 LAKE YUCATAN 56 mussel infestation 56 Rabid skunk 56 Beaches Closed 56 Freshwater mussels 56 Tanker explodes 56 PROSSER LAKE 56 ROLLINS LAKE 56 Tukituki River 56 Raw Sewage 56 sailboat capsizes 56 Kensico Reservoir 56 Rain soaks 56 Sauquoit Creek 56 Prettyboy Reservoir 56 Siltcoos Lake 56 Oil Spill Threatens 56 polluted runoff 56 turbid water 56 Wildfire threatens 56 sewage 56 Funnel cloud 56 muddy moonscape 56 Gordons Pond 55 Saltwater intrusion 55 Family Mortuary Oildale 55 Treated sewage 55 Tulloch Reservoir 55 Clogged drains 55 prompts evacuations 55 Invasive mussels 55 Found Floating 55 Controlled burn 55 Torrential downpour 55 Prewitt Reservoir 55 groundwater aquifer 55 sanitary sewer overflow 55 Brackish water 55 Muscatatuck River 55 saline intrusion 55 Chollas Creek 55 clogged culverts 55 Lake Fulmor 55 Semi overturns 55 Bacterial contamination 55 Cachuma Bay 55 Cheoah River 55 raw sewage overflowed 55 Swollen corpses dotted 55 Hueco Bolson 55 stilling basin 55 Boats trolling 55 algal toxin 55 Netarts Bay 55 Lake Lahontan 55 Rabid fox 55 cyanobacteria blooms 55 berm separates 55 Tamara Grippi covers 55 canoe overturns 55 Netarts 55 Body Pulled 55 Intersex fish 55 stormwater outfalls 55 Thurmond Dam 55 sediment dredged 55 Cheesman Reservoir 55 Clam Bayou 55 INDIAN CREEK RESERVOIR 55 Boat sinks 55 raw sewage seeping 55 tributary rivers 55 dumping untreated sewage 55 muck dredged 55 Harmful algal blooms 55 raw sewage overflowing 55 Pompton Lake 55 Shiranui Sea 55 Cullaby Lake 55 San Francisquito 55 Charlestown Breachway 55 Wynooche 55 Graveline Bayou 55 Wading pools 55 Fire Fully Contained 55 Coralville Dam 55 wasterwater 55 Floods engulf 55 Lacamas Creek 55 stormwater pipes 55 alluvial aquifer 55 Suisun Slough 55 Pigeon droppings 55 porpoise vaults 55 FRENCHMAN LAKE 55 wastewater effluent 55 Localised flooding 55 tidal estuary 55 Freshwater Lagoon 55 upper Fryingpan 55 chlorine residuals 55 Perchlorate contamination 55 Banklick Creek 55 Whittier Narrows Dam 54 Hiker rescued 54 Durand Eastman 54 Lockwoods Folly 54 Caloosahatchee estuary 54 Cold temps 54 Sandbars 54 Alviso Slough 54 Lake Tetonka 54 Ridgway Reservoir 54 Morro Strand 54 polluting groundwater 54 CAMP FAR WEST 54 Mississinewa River 54 seagull droppings 54 Navajo Reservoir 54 Soil erosion 54 Garbage dumps 54 Loch Lomond Reservoir 54 stormwater basins 54 STAMPEDE RESERVOIR 54 fishkill 54 bird excrement 54 Sweetwater Reservoir 54 Small Quake Hits 54 Overturned truck 54 Coyote sightings 54 Guadalupe Dunes 54 Hylebos Creek 54 sewer outfall 54 Otay River 54 enterococcus bacteria 54 pumpouts 54 Wanaque Reservoir 54 Vasden displayed kenaf booms 54 LAKE OROVILLE 54 Eld Inlet 54 Pascack Brook 54 Steamboat Slough 54 Dam spillway 54 Caloosahatchee rivers 54 overflowing sewage 54 Polluted 54 Silverwood Lake 54 spillway diverts river 54 stormwater overflows 54 Lingcod fishing 54 Twanoh 54 unsightly algae blooms 54 outfall 54 pike minnow 54 Downed wires 54 creek overflowed 54 Toxic algae blooms 54 Bogachiel River 54 lowland flooding 54 Kaiolu Street 54 Boaters Rescued 54 Warmer temps 54 Nogales Wash 54 saltwater intrusion 54 overflowing sewers 54 Avian botulism 54 Shark Sightings 54 Allegan Dam 54 Nippersink Creek 54 LOON LAKE 54 Combined sewer overflows 54 Fire Victim Identified 54 Yolo Bypass 54 Heeia Kea 54 snowbird enclave 54 Gualala River 54 fecal bacteria 54 plantlike bacteria 54 Kaituna River 54 Willow Slough 54 Contractor Argonaut Constructors 54 Alum Creek Reservoir 54 Jellyfish stings 54 Radioactive tritium 54 Twin Ports harbor 54 pier jutting 54 toxic algal bloom 54 Sinkhole closes 54 Friant Kern Canal 54 Necanicum 54 Decomposed body 54 Girl Drowns 54 Xe Bang Fai 54 Tradewater River 54 Skagit Snohomish 54 Fourmile Creek 54 El Capitan Reservoir 54 btwn Spinney 54 Nickajack Dam 54 Duckabush 54 Diking District 54 Point Ano Nuevo 54 Sewer Treatment Plant 54 Beaverdam Creek 54 Driftwood Branch 54 Sisquoc River 54 Saugatuck Reservoir 54 Elochoman 54 Fatal Accident Near 54 Lesner Bridge 54 Sespe Condor Sanctuary 54 UNION VALLEY RESERVOIR 54 Drenching storms 54 Lookout Shoals 54 pipeline ruptures 54 inadvertently puncturing 53 Funnel clouds spotted 53 Bullards Bar Reservoir 53 Brownlee Reservoir 53 Hewletts Creek 53 toxic algae 53 Putah 53 Lake Nagawicka 53 Assunpink Creek 53 seiche 53 Decomposing body 53 Aquia Creek 53 Suspects ID'd 53 Branchport Creek 53 Fire Scorches 53 Car careens 53 goose feces 53 Bayou Plaquemine 53 THE CASTAWAYS BASS CLUB 53 oxbow lakes 53 jigging crawlers 53 Pierce Inlet 53 eroding shorelines 53 sprayfield 53 phosphogypsum stacks 53 Reservoir O'Neill Forebay 53 contaminate shellfish 53 Kaweah River 53 Shark sighting 53 Woman Drowns 53 Downed tree limbs 53 seawater intrusion 53 Zorinsky Lake 53 sewage outfall pipe 53 brackish groundwater 53 dump untreated sewage 53 sandy shorelines 53 shellfishing beds 53 sturgeon spawning 53 Brices Creek 53 unpermitted discharges 53 Chorro Creek 53 Pesticide spraying 53 Rialto Colton 53 Burst pipes 53 Ice jams 53 Rabid raccoon 53 Body Washes Ashore 53 Duxbury Reef 53 coastal bays 53 Keswick Dam 53 enterococci bacteria 53 sediment runoff 53 Flood waters recede 53 toxins leaching 53 Lake Zorinsky 53 bd.className + = 53 Whirling disease 53 River Smithland Pool 53 sewer overflows 53 sediment basins 53 buggy flips 53 Body Discovered 53 Jumbo Reservoir 53 Gasparilla Pass 53 DONNER LAKE 53 barge capsizes 53 chinook angling 53 Hogtown Creek 53 dolphins wash ashore 53 Sespe Creek 53 effluent discharged 53 intracoastal waterway 53 Lake Zumbro 53 swimmer itch 53 removing contaminated sediments 53 overflowing septic tanks 53 untreated sewage 53 herring shad 53 Sedimentation 53 Crane topples 53 Seapoint Beach 53 thickly vegetated 53 Lake Gerar 53 Bicyclist dies 53 effluent discharges 53 bear maulings 53 stormwater discharges 53 freight train derails 53 Moyie River 53 Crash Identified 53 Tanker overturns 53 Body Recovered 53 Mashes Sands 53 Plane Crash Victims Identified 53 harmful algae bloom 53 Okatibbee Lake 53 Skookumchuck River 53 Melted snow 53 Pactola 53 Calaveras Reservoir 53 Storms drench 53 recreational shellfish harvesting 53 shallow aquifer 53 Nacimiento Lake 53 Dying jellyfish 53 Brushfires 53 Rain Swollen 53 Fire Forces Evacuations 53 sanitary sewer overflows 53 Tomales Point 53 Crash Victims Identified 53 nutrient loadings 53 Elevation normal 53 Old Drowns 53 LMDT 53 Herbicide spraying 53 Caxambas Pass 53 Highline Canal 53 aquatic hitchhikers 53 Shark Sighting 53 Man Body Found 53 Tailrace 53 Papio Creek 53 Boating Accident 53 stormwater outfall 52 Nitrate contamination 52 Tinkers Creek 52 leaky septic 52 Causes Evacuations 52 Plane copter collide 52 Minnow Creek 52 Keyhole Reservoir 52 Ochlockonee 52 Boy Drowns 52 Navy copter crashes 52 outer edges complicated 52 Catalytic converter thefts 52 North Fork Toutle 52 Overflows 52 Ballville Dam 52 Couple Rescued 52 sunken tugboat 52 brook lamprey 52 Lualualei 52 Body Found Near 52 Seeping 52 naturally occurring radium 52 Squantz 52 Ruamahanga 52 eelgrass habitat 52 Crop duster crashes 52 downlake 52 Planes collide 52 Wappapello Lake 52 salinisation 52 Illegal dumping 52 Palisades Reservoir 52 Nicomekl River 52 overflowing manholes 52 Pepacton Reservoir 52 Beeds Lake 52 Shellfish beds 52 Pardeeville dam 52 Log Gulch 52 raw sewage overflows 52 eroding bluffs 52 Tainted spinach 52 Boca Reservoir 52 untreated effluent 52 spokesman Ron LaBrec 52 Unattended candle 52 embayments 52 Striper bite 52 Norovirus outbreaks 52 stinky mess 52 common murres 52 Copalis Beach 52 sewage effluent 52 Creek tributary 52 McNears Beach 52 Seccombe Lake 52 Landslip 52 dechlorinated 52 nutrient inputs 52 Goose droppings 52 Containment booms 52 Enviros sue 52 Upcountry reservoirs 52 algal bloom 52 Mold mildew 52 creeks overflowed 52 Tree trimmer 52 brooks streams 52 kokanee spawning 52 drains overflowed 52 Ash borer 52 Missing hiker 52 ponding basins 52 Capsized boat 52 Snowstorm snarls 52 stench wafting 52 streambank erosion 52 Escaped inmate captured 52 raw untreated sewage 52 Crash snarls 52 Hiker dies 52 decaying algae 52 Warm Springs Dam 52 Barataria Basin 52 Chopper crashes 52 Quagga mussel 52 skipjack herring 52 Melting snow 52 Lake Rhodhiss 52 Skippack Creek 52 Wastewater Plant 52 turbidity cloudiness 52 Zuniga Jetty 52 Wekiwa Springs 52 Klineline Pond 52 homemade dipnetting pole 52 Boxelder Creek 52 Bonnechere River 52 Glendo Reservoir 52 Lagunitas Creek 52 Waning Ida downpours 52 Searchers scour 52 outfall pipes 52 Lake Oscawana 52 drain outfalls 52 contaminate aquifers 52 clogging drains 52 Aucilla River 52 tar balls ashore 52 CAPLES LAKE 52 Lyngate Park Midport Road 52 Whiskey Slough 52 Endangered turtles 52 Evitts Creek 52 Wynoochee 52 sewage outfalls 52 CBP speedboats prowled 52 fecal coliform 52 outfalls 52 Prescribed burn 52 Junked cars 52 Yough Dam 52 Algae Bloom 52 avian cholera 52 Kayakers paddle 52 Snowmobiler dies 52 Septic tanks 52 Man Drowns 52 invasive mussels 52 backwater lakes 52 endangered chinook salmon 52 fecal coliform bacteria 52 waterways 52 Wheatland Ferry 52 Orman Dam 52 Cañada del Oro 52 Lion Sighting 52 leach toxins 52 stormwater inlets 52 Perch anglers 52 plankton bloom 52 Powerless cruise ship 52 discharging polluted 52 warmwater fish 52 Limantour Beach 52 Smallmouth fishing 52 tidal creek 52 Boca Chica Beach 52 parasite cryptosporidium 52 Sinkholes 52 discharging contaminates 52 Siskiyou counties 52 Fecal coliforms 52 bacteriological contamination 52 McKees Point 52 dams spillways 52 pelicans turtles 52 deplete oxygen 52 Heavy Rains Cause 52 Lahontan cutthroat 52 piers jetties 52 Carquinez Strait 52 Isleton Bridge 52 resacas 52 Small Earthquake Shakes 52 acid sulphate soil 52 mainstem Umpqua 51 levee breeches 51 brackish lagoon 51 ponding basin 51 Santiam Canal 51 erosion sedimentation 51 Middlegrounds 51 Pineview Reservoir 51 McClusky Canal 51 Levisa 51 Wildfire Contained 51 Beached whale 51 Chocolay River 51 Twin Coves 51 Speckled perch 51 Little Assawoman Bay 51 Repairs Underway 51 Firefighters douse blaze 51 discharge untreated wastewater 51 Burst pipe 51 Uvas Creek 51 Plane Crashes Near 51 Trabuco Creek 51 Llagas Creek 51 creeks 51 Artificial reef 51 Biscayne Aquifer 51 beachwater 51 Trashmore 51 Matanzas Inlet 51 Croton Watershed 51 Considers Smoking Ban 51 algae blooms 51 Soquel Hole 51 Saylorville Dam 51 Mosquitoes breed 51 Alligator Creek 51 dissolved oxygen DO 51 Loantaka Brook 51 Upriver Dam 51 stormwater discharge 51 Camanche Dam 51 weedy bays 51 Severe infestations 51 oxbows 51 tributary streams 51 Karl Swanberg 51 nutrient loading 51 herring spawning 51 Quarry Lakes 51 Razor clamming 51 groundwater depletion 51 Septic tank 51 Lake Nacimiento 51 Blocked drains 51 inland bays 51 Stabbing Suspect Arrested 51 Kalihi Stream 51 Betsie River 51 saturated catchments 51 silt dredged 51 Ammonia leak 51 Wailoa 51 Coosa Tallapoosa 51 meltoff 51 tannin stained 51 Henry Hagg 51 Conemaugh River 51 Scajaquada Creek 51 Tug Fork 51 Sperm whale 51 Filtration Plant 51 Bacteria Levels 51 Flooding Forces Evacuations 51 Sequoyah Boat Dock 51 South Fork Tenmile 51 Threatens Homes 51 Eightmile 51 Car Plunges 51 coli bacteria 51 Raccoon rivers 51 Lofall 51 Sporthaven Beach 51 spawning habitats 51 Drainage Basin 51 Storms Wreak Havoc 51 vibrio vulnificus 51 discharging wastewater 51 pollutes streams 51 nesting piping plovers 51 Untreated wastewater 51 Ebey Slough 51 Toddler Drowns 51 Citrus Heights Elk Grove 51 Rialto Fontana 51 Upper Truckee 51 Possible Drowning 51 Winchuck River 51 Hammonasset River 51 Killbuck Creek 51 suggested desalinating sea 51 Lemolo Lake 51 Freight train derailment 51 Waiwhakaiho River 51 Flood Waters Recede 51 Basin snowpack 51 Sluice gates 51 Claymont Del. spilling 51 BRITE LAKE 51 Vallecito Creek 51 Amtrak train derails 51 creeks streams 51 Quartermaster Harbor 51 Ogeechee River 51 shortnose sturgeon 51 shoreline erosion 51 Norovirus outbreak 51 Cannonsville Reservoir 51 unlined landfill 51 Cape Alava 51 Nu'uanu Stream 51 unsewered 51 dolphin sightings 51 Kamishak Bay 51 Severe thunderstorm 51 tessa.moran @ thomsonreuters.com 51 bays estuaries 51 freshwater lakes rivers 51 Beaver Creek Reservoir 51 dune lakes 51 Tionesta Creek 51 marine biotoxin 51 Bradys Run Lake 51 discharging untreated sewage 51 #.#R [004] 51 beaver huts 51 Vallecito Reservoir 51 Arroyo Burro Beach 51 Cobbetts Pond 51 turbid waters 51 untreated wastewater 51 Crash Victim Identified 51 drift eastward 51 Harney Pond 51 Sickness bug 51 Missing kayaker 51 Caspersen Beach 51 Carquinez Straits 51 Launch Ramp 51 acid sulphate soils 51 depletes oxygen 51 Vega Verde 51 algal blooms 51 Calleguas Creek 51 Escondido Rancho Bernardo 51 Blown transformer 51 Shellfishing 51 tidal flushing 51 Kapaa Quarry Road 51 Struve Slough 51 dredgings 51 Chickasawhay River 51 Rattlesnake Creek 51 Heavy Rain Causes Flooding 51 Clara Meer 51 Durand Eastman Park 51 Train derails 51 Fatal stabbing 51 soundside 51 Sewage 51 Swimmer itch 51 Dangerous staph germs 51 Enterococcus bacteria 51 Bullards Bar 51 Abalone diver 51 tributary reservoirs 51 Quanicassee River 51 E coli bacteria 51 Saufley Landfill 51 Siuslaw River 51 Biloxi Marshes 51 E Coli bacteria 51 COLLINS LAKE 51 creek 51 dammed rivers 51 Overturned tractor trailer 51 Los Vaqueros Reservoir 51 rainwater seeps 51 percolation ponds 51 endangered coho salmon 51 Child Drowns 51 fertilized lawns 51 Legionnaires outbreak 51 Poway Ramona 51 Wildfires rage 51 Canoochee 51 Skagit Whatcom 51 Oso Flaco 51 Banana Dike 51 Croton Reservoir 51 Blind Pass 51 Durand Eastman Beach 51 Winds howled 51 Wacissa 51 Decomposing Body Found 51 Topock Gorge 51 pollutes waterways 51 outfall canal 51 Weitchpec 51 Ruggles Reef 51 Bodies Pulled From 51 ocean outfalls 51 Cutthroat Trout 51 Norovirus sickens 51 Henrys Fork 51 Altose 51 #cfs [001] 51 Splake 51 quaggas 51 Kalaeloa Barbers Point 51 Dewatto 51 Overton Arm 51 Bonnet Carré Spillway 51 Attempted abduction 51 blackwater streams 51 bayside beaches 51 rivers estuaries 50 Diesel Spill 50 browns rainbows 50 Wildfire Threatens Homes 50 Power outage darkens 50 Trash litters 50 wadable 50 Afternoon thunderstorms 50 pollute rivers 50 wastewater lagoons 50 windward slopes 50 navigational hazards 50 Busy beavers 50 Boat Ramps 50 Matanzas Pass 50 Presumed Drowned 50 Conchas Lake 50 Dyes Inlet 50 shallow aquifers 50 Record rainfalls 50 Cowiche Canyon 50 Helicopter crashes 50 nonpotable 50 O'Byrnes Ferry Road 50 northern leopard frogs 50 Grande Ronde River 50 Stump Pass 50 Econfina Creek 50 discharge effluent 50 Homicide Suspect Arrested 50 Furnace Pond 50 playa lake 50 toxic algae bloom 50 sediment buildup 50 Contaminated soil 50 underwater obstructions 50 unpermitted discharge 50 sending raging torrent 50 shorebird nesting 50 Suisun Marsh 50 Interstate #W crumpled 50 Ninemile Creek 50 Loma Alta Creek 50 dredged silt 50 ocean overwash 50 Nuuanu Stream 50 Climber dies 50 desalinate brackish 50 Stoneflies 50 microcystis 50 Resevoir 50 shallow weedy 50 Abalone Cove 50 algal toxins 50 Oquaga Creek 50 drier winters 50 Nestucca River 50 Pavement patching 50 Pilarcitos 50 Overflowing rivers 50 Hereford Inlet 50 creekbeds 50 Bus plunges 50 Aorere River 50 Napatree Point 50 Rossmoor Parkway 50 Dorena Lake 50 Lake Quonnipaug 50 Cheesequake Creek 50 Neuse River basin 50 streamside habitat 50 Hamakuapoko 50 coho fishery 50 By Chauna Aguilar 50 Dredged 50 Alpental Ski Area 50 Lake Tenkiller 50 wellwater 50 phosphorus pollution 50 sulfate concentrations 50 Annisquam River