Ontario

It depends on the town. 579 of 645 listed water systems in Ontario, Canada are low risk (89.8%).

• 579Low
• 62Medium
• 3High
• 1Critical

• A.L. Dafoe (Greater Napanee)Low risk
• ActonLow risk
• Airport (Brant County)Low risk
• AlexandriaMedium risk
• AllistonLow risk
• Alpine/Pirates GlenLow risk
• AlvinstonLow risk
• Amabel-Sauble (The South Bruce Peninsula)Low risk
• Ameliasburgh Hamlet (Prince Edward County)Low risk
• AmherstburgLow risk
• AngusLow risk
• Ansnorveldt (King)2 systems · low risk
• Anten MillsLow risk
• Armow (Kincardine)Low risk
• ArnpriorLow risk
• Arran-ElderslieLow risk
• ArthurLow risk
• AtikokanLow risk
• AtwoodLow risk
• AuburnLow risk
• AuroraMedium risk
• AylmerLow risk
• Aylmer Area SecondaryLow risk
• AyrLow risk
• BalaLow risk
• Ballantrae-Musselman LakeLow risk
• Ballantrae-Musselman'SLow risk
• Balmertown Cochenour Mackenzie Island (Red Lake)Low risk
• BancroftLow risk
• Bare Point Road (Thunder Bay City)Low risk
• BarrieLow risk
• Barry'S BayLow risk
• BarwickMedium risk
• Bass Lake Woodlands (Severn)Low risk
• BathLow risk
• BaxterLow risk
• BayhamLow risk
• Bayshore VillageLow risk
• Bayside (Quinte West)Low risk
• BaysvilleLow risk
• BeachburgLow risk
• BeachvilleLow risk
• Beamsville (Lincoln)Medium risk
• Beardmore (Greenstone)Medium risk
• BeavertonLow risk
• Belgrave (Morris-Turnberry)Low risk
• BellevilleLow risk
• BelmontLow risk
• Benmiller (Ashfield-Colborne-Wawanosh)Low risk
• Bevan Heights (Niagara-On-The-Lake)Low risk
• Birchpoint Estates (Kawartha Lakes)Low risk
• BirrHigh risk
• BlackstockLow risk
• Blind RiverLow risk
• Bluewater (Tiny)Low risk
• Bluewater LakeshoreLow risk
• BlythLow risk
• BobcaygeonLow risk
• BothwellMedium risk
• BowmanvilleLow risk
• BracebridgeMedium risk
• Bradford/BondheadMedium risk
• Branchton (North Dumfries)Low risk
• BrantfordLow risk
• Brechin & Lagoon City (Ramara)Low risk
• BreslauMedium risk
• Bright (Blandford-Blenheim)Low risk
• Brighton SpringsLow risk
• BrockvilleMedium risk
• Brownsville (South-West Oxford)Low risk
• Bruce MinesLow risk
• Brucefield (Huron East)Medium risk
• BrusselsMedium risk
• Buckingham Woods (Clearview)Low risk
• Burk'S FallsLow risk
• Cainsville (Brant County)Low risk
• Caledon Village - AltonLow risk
• Caledonia And CayugaLow risk
• CallanderLow risk
• CamborneLow risk
• CambridgeLow risk
• CampbellfordLow risk
• CampbellvilleLow risk
• Cana (Kingston)Low risk
• Canadiana Shores (Kawartha Lakes)Low risk
• CanningtonLow risk
• Canterbury (Oro-Medonte)Low risk
• Caramat (Greenstone)Low risk
• CardiffLow risk
• CardinalLow risk
• Cardinal Woods (Mono)Low risk
• Carleton PlaceLow risk
• CarlisleLow risk
• CarpLow risk
• CasselmanLow risk
• Castle Cove (Tiny)Low risk
• Cedar Brook (Oro-Medonte)Low risk
• Central ElginLow risk
• Centre WellingtonLow risk
• Century Heights (Ashfield-Colborne-Wawanosh)Low risk
• Chalk River (Laurentian Hills)Low risk
• ChapleauLow risk
• CharltonLow risk
• ChathamMedium risk
• ChatsworthLow risk
• CheltenhamLow risk
• Chepstow (Brockton)Medium risk
• ChurchillLow risk
• Clifford (Minto)Low risk
• ClintonLow risk
• CobaltLow risk
• CobdenLow risk
• CobourgLow risk
• CochraneLow risk
• ColborneLow risk
• ColdwaterMedium risk
• ColemanLow risk
• ColganLow risk
• Colling-Woodlands (Clearview)Medium risk
• CollingwoodLow risk
• Consecon/Carrying PlaceLow risk
• Cook'S Lake (Tiny)Low risk
• CornwallLow risk
• Craighurst (Oro-Medonte)Low risk
• Creemore (Clearview)Low risk
• Creighton Heights (Hamilton Township)Low risk
• Crysler (North Stormont)Low risk
• Davy Drive (Ramara)Low risk
• Dawn-EuphemiaLow risk
• Decew Falls-Niagara Falls - Decew FallsLow risk
• Decew Falls-Niagara Falls - Niagara FallsLow risk
• Deep RiverLow risk
• Del Trend (Springwater)Low risk
• DelhiMedium risk
• DeloroLow risk
• Dereham CentreLow risk
• Desbarats (Johnson)Low risk
• DeserontoLow risk
• DorchesterLow risk
• DowlingLow risk
• Drayton (Mapleton)Low risk
• Drumbo-PrincetonLow risk
• DrydenLow risk
• DubreuilvilleLow risk
• Dundalk (Southgate)Low risk
• Dungannon (Ashfield-Colborne-Wawanosh)Medium risk
• DunnvilleLow risk
• Durham (West Grey)Low risk
• Dutton-DunwichLow risk
• Dyno Estates (Highlands East)Low risk
• Ear FallsLow risk
• Earlton (Armstrong)Low risk
• East Lambton ShoresLow risk
• East LintonLow risk
• Echo BayLow risk
• Edwardsburgh Industrial Park (Edwardsburgh/Cardinal)Low risk
• EganvilleLow risk
• Elgeti And Crystal Springs Subdivisions (Otonabee-South Monaghan)Low risk
• Elgin Area Primary (Central Elgin)Low risk
• Elk LakeLow risk
• Elliot LakeLow risk
• ElmvaleLow risk
• EmbroLow risk
• EmoLow risk
• EnglehartLow risk
• Enniskillen TownshipLow risk
• ErinLow risk
• EspanolaLow risk
• Essex - EssexLow risk
• Essex - Harrow-Colchester SouthLow risk
• EverettLow risk
• Fairfield (Loyalist)Low risk
• Falconbridge (Greater Sudbury)Low risk
• FauquierLow risk
• Fenelon FallsLow risk
• FinchLow risk
• Foreman (The South Bruce Peninsula)Low risk
• Fort ErieLow risk
• Fort FrancesLow risk
• Foxboro (Wilmot)Low risk
• Frankford-BatawaLow risk
• Freelton (Hamilton City)Medium risk
• Gazer Mooney (Guelph-Eramosa)Low risk
• GeorgetownLow risk
• Georgian Bay Estates (Tiny)Low risk
• Georgina - GeorginaLow risk
• Georgina - KeswickLow risk
• GeraldtonMedium risk
• Glen RobertsonLow risk
• Glen Walter (South Glengarry)Low risk
• GoderichLow risk
• Gore BayLow risk
• Gowanstown (North Perth)Low risk
• GraftonLow risk
• Grand ValleyMedium risk
• GravenhurstLow risk
• GreenbankLow risk
• GreensvilleLow risk
• Grimsby2 systems · low risk
• GuelphLow risk
• HaileyburyMedium risk
• Haley (Whitewater Region)Low risk
• Hamilton - Fifty RoadLow risk
• Hamilton - WoodwardLow risk
• Hamilton Drive (Guelph-Eramosa)Low risk
• HanoverLow risk
• Harbourwood (Oro-Medonte)Low risk
• Harriston (Minto)Low risk
• HastingsLow risk
• HavelockLow risk
• HawkesburyLow risk
• HearstLow risk
• Heidelberg2 systems · low risk
• Hensall-ZurichLow risk
• Herbert Avenue (Hornepayne)Low risk
• HicksonMedium risk
• HillsburghMedium risk
• HillsdaleLow risk
• Hilton BeachLow risk
• HockleyLow risk
• Holland Landing/Queensville/Sharon (East Gwillimbury)Low risk
• Holtyre (Black River-Matheson)Low risk
• Horseshoe Highlands (Oro-Medonte)Low risk
• Hudson (Sioux Lookout)Low risk
• HuntsvilleLow risk
• Huron Sands (Ashfield-Colborne-Wawanosh)Low risk
• Huron Woods (The South Bruce Peninsula)Low risk
• IgnaceMedium risk
• IngersollLow risk
• InglewoodLow risk
• Innerkip (East Zorra-Tavistock)Medium risk
• Innisfil HeightsLow risk
• Innisfil Lake SimcoeMedium risk
• Integrated Urban Water (Kitchener)Low risk
• Iroquois FallsLow risk
• Island Lake (Mono)Low risk
• James W. King (Gananoque)Low risk
• JanetvilleLow risk
• Jordan-Vineland (Lincoln)Low risk
• KagawongLow risk
• KapuskasingLow risk
• Keene Heights (Otonabee-South Monaghan)Low risk
• Kelly (Central Huron)Low risk
• KemptvilleLow risk
• Kenora AreaMedium risk
• Keswick-SuttonLow risk
• KillaloeLow risk
• KillarneyMedium risk
• Kimberley-Amik-TalismanLow risk
• KincardineLow risk
• King CityMedium risk
• King'S Bay (Kawartha Lakes)Low risk
• Kings Park (Ottawa)Low risk
• Kingston - King StreetLow risk
• Kingston - Point PleasantLow risk
• KingsvilleLow risk
• KinmountLow risk
• Kirkland LakeLow risk
• KitchenerLow risk
• L'OrignalLow risk
• Lafontaine (Tiny)Low risk
• Lake Huron Primary (South Huron)Low risk
• Lake RosalindLow risk
• LakefieldLow risk
• LakeshoreLow risk
• Lakeshore (Huron-Kinloss)Low risk
• Lakeshore - Stoney PointLow risk
• Lakeshore - TecumsehLow risk
• Lakeshore - UnionLow risk
• LakesideLow risk
• Lambton Area (Sarnia)Low risk
• LancasterLow risk
• LansdowneLow risk
• Larder LakeMedium risk
• LasalleLow risk
• LatchfordMedium risk
• Laurentian Park (Champlain)Low risk
• Laurentian ValleyLow risk
• Leamington - UnionLow risk
• Leamington - WheatleyMedium risk
• Lefaive (Tiny)Low risk
• Lefaivre And Plantagent (Alfred And Plantagenet)Low risk
• Leith (Meaford)Low risk
• Lepage (Penetanguishene)Low risk
• LimogesLow risk
• LindsayLow risk
• LinwoodLow risk
• Lion'S HeadLow risk
• Lisle (Adjala-Tosorontio)Low risk
• ListowelLow risk
• Little CurrentLow risk
• LondonLow risk
• Long Sault/Ingleside RegionalLow risk
• Longlac (Greenstone)Medium risk
• Lucan BiddulphLow risk
• LucknowLow risk
• Lutterworth Pines (Minden Hills)Low risk
• Lynden (Hamilton City)Low risk
• MactierLow risk
• MadocLow risk
• MadsenLow risk
• MalahideLow risk
• Manilla (Kawartha Lakes)Low risk
• ManitouwadgeLow risk
• ManitowaningLow risk
• MannheimLow risk
• Manorview (Kawartha Lakes)Low risk
• Mansfield (Mulmur)Low risk
• Maplewood (Oro-Medonte)Low risk
• MarathonLow risk
• Mariposa Estates (Kawartha Lakes)Low risk
• MarkdaleLow risk
• MarkhamMedium risk
• MarkstayMedium risk
• MarmoraLow risk
• MarsvilleLow risk
• MaryhillLow risk
• Maryhill - MaryhillLow risk
• MasseyLow risk
• MatachewanLow risk
• MathesonLow risk
• MattawaLow risk
• MatticeLow risk
• Mcclinchey (Central Huron)Low risk
• Mcdougall NobelLow risk
• MeafordLow risk
• Medonte Hills (Oro-Medonte)Low risk
• MelroseLow risk
• MerrickvilleLow risk
• Middlesex Centre - Middlesex CentreLow risk
• MidhurstLow risk
• Midhurst Valley (Springwater)Low risk
• MidlandLow risk
• MildmayLow risk
• MillbrookLow risk
• Miller Manor Apartments (Front Of Yonge)Low risk
• MilvertonLow risk
• MindemoyaLow risk
• MindenLow risk
• MinesingMedium risk
• Minto PinesLow risk
• Mississippi MillsLow risk
• MitchellLow risk
• MolesworthMedium risk
• MontagueLow risk
• MonteithLow risk
• Monteith Correctional Complex (Iroquois Falls)Low risk
• MoonbeamLow risk
• Moorefield (Mapleton)Low risk
• Moose CreekLow risk
• MoosoneeLow risk
• Mount Albert2 systems · low risk
• Mount ElginLow risk
• Mount ForestLow risk
• Mt. Pleasant (Brant County)Low risk
• Munster Hamlet (Ottawa)Low risk
• Nairn CentreLow risk
• Nakina (Greenstone)Medium risk
• NanticokeLow risk
• NeustadtLow risk
• New Dundee2 systems · low risk
• New Hamburg-BadenLow risk
• New LiskeardLow risk
• New Lowell (Clearview)Low risk
• Newbury (West Elgin Aws)Low risk
• Newcastle (Clarington)Low risk
• Newington (South Stormont)Low risk
• NewmarketLow risk
• Niagara FallsLow risk
• Niagara-On -The-LakeLow risk
• NipigonLow risk
• Nobleton2 systems · low risk
• NorlandLow risk
• North BayLow risk
• North DundasLow risk
• North MiddlesexMedium risk
• NorwoodLow risk
• Nottawa (Clearview)Low risk
• Oil Springs WaterLow risk
• OliphantLow risk
• OmemeeLow risk
• Onaping/LevackLow risk
• OpasatikaMedium risk
• OrangevilleLow risk
• OrilliaLow risk
• OronoLow risk
• Oshawa-Whitby-Ajax - AjaxLow risk
• Oshawa-Whitby-Ajax - OshawaLow risk
• Oshawa-Whitby-Ajax - WhitbyLow risk
• Ottawa - BritanniaLow risk
• Ottawa - Lemieux IslandLow risk
• Owen SoundLow risk
• Oxenden (Georgian Bluffs)Low risk
• Oxford South (Norwich)Medium risk
• Palgrave-Caledon EastLow risk
• Palmerston (Minto)Low risk
• ParisLow risk
• Park Lane (Ramara)Low risk
• Parry SoundLow risk
• Payette (Penetanguishene)Low risk
• Peats Point (Prince Edward County)Low risk
• PelhamLow risk
• PembrokeLow risk
• Pennorth (Tiny)Low risk
• Perkinsfield (Tiny)Low risk
• PerthLow risk
• PetawawaLow risk
• PeterboroughLow risk
• PetroliaMedium risk
• Phelpston (Springwater)Low risk
• Pickle LakeMedium risk
• PictonLow risk
• Pinewood (Kawartha Lakes)Medium risk
• PlattsvilleLow risk
• Pleasant Point (Kawartha Lakes)Low risk
• Plympton-WyomingLow risk
• Point Anne Hamlet (Belleville)Low risk
• Porquis JunctionLow risk
• Port Burwell Area Secondary (Malahide)Low risk
• Port CarlingLow risk
• Port Colborne2 systems · low risk
• Port DoverLow risk
• Port HopeMedium risk
• Port PerryLow risk
• Port RowanLow risk
• Port SevernLow risk
• Port SydneyLow risk
• Pottawatomi (Georgian Bluffs)Low risk
• PowassanLow risk
• PrescottLow risk
• Pronto East (The North Shore)Medium risk
• Rainy RiverLow risk
• RamoreLow risk
• Rayko (Tiny)Medium risk
• Red LakeLow risk
• Red RockLow risk
• Redwood Estates (South Glengarry)Low risk
• Region Of Waterloo - CambridgeLow risk
• Region Of Waterloo - KitchenerLow risk
• Region Of Waterloo - Lloyd Brown (North Dumfries)Low risk
• Region Of Waterloo - MannheimLow risk
• Region Of Waterloo - Mannheim Village (Wilmot)Low risk
• Region Of Waterloo - New Hamburg-BadenLow risk
• Region Of Waterloo - WaterlooLow risk
• Region Of Waterloo -Shingletown (Wilmot)Low risk
• RenfrewLow risk
• Richards Landing (St. Joseph)Low risk
• Richmond Community (Bayham)Low risk
• Richmond HillLow risk
• Richmond West (Ottawa)Low risk
• RidgetownLow risk
• RipleyLow risk
• Robin Crest (Oro-Medonte)Low risk
• RocklandLow risk
• RockwoodLow risk
• Rope (Tay)Low risk
• Rosehill (Fort Erie)Medium risk
• RosemontLow risk
• Roseville (North Dumfries)Low risk
• Rosslyn Village (Oliver Paipoonge)High risk
• Rossmore/Fenwood GardensLow risk
• RussellLow risk
• S.A.M. (Central Huron)Low risk
• Sandcastle Estates (Severn)Low risk
• Sandhurst ShoresLow risk
• SarniaLow risk
• Saugeen ShoresLow risk
• Sault Ste MarieLow risk
• Sawlog Bay (Tiny)Low risk
• Schomberg2 systems · low risk
• SchreiberLow risk
• Scott Point (Kincardine)Low risk
• SeaforthLow risk
• SebringvilleLow risk
• Serpent River (The North Shore)Medium risk
• Severn EstatesLow risk
• Shadow Ridge (Ottawa)Low risk
• Shakespeare (Perth East)Medium risk
• Shallow Lake (Georgian Bluffs)Low risk
• Shanty Bay (Oro-Medonte)Low risk
• SheguiandahLow risk
• ShelburneLow risk
• SimcoeLow risk
• Sioux Lookout UrbanLow risk
• Smiths FallsLow risk
• SmithvilleLow risk
• Smooth Rock FallsMedium risk
• Snow Valley (Springwater)Low risk
• Somerset/ Knob Hill (Ramara)Low risk
• Sonya Village (Kawartha Lakes)Low risk
• South BaymouthLow risk
• South Chatham-KentLow risk
• South Dundas RegionalLow risk
• South Halton - Bridgeview Community (Burlington)Low risk
• South Halton - BurlingtonLow risk
• South Halton - Burloak (Oakville)Low risk
• South Halton - MiltonLow risk
• South Halton - North Aldershot (Burlington)Low risk
• South Halton - OakvilleLow risk
• South Halton - Snake Road (Burlington)Low risk
• South Halton - South Halton (Oakville)Low risk
• South HuronLow risk
• South Peel (Mississauga)Low risk
• South Peel - Arthur P. Kennedy (Mississauga)Low risk
• South Peel - Lorne ParkLow risk
• South RamaraLow risk
• South RiverLow risk
• Southview EstatesLow risk
• Southwest MiddlesexLow risk
• SouthwoldLow risk
• SpanishLow risk
• St Andrews/Rosedale Terrace (South Stormont)Low risk
• St MarysLow risk
• St. AgathaLow risk
• St. CatharinesLow risk
• St. ClairLow risk
• St. ClementsLow risk
• St. GeorgeLow risk
• St. IsidoreLow risk
• St. Pauls (Perth South)Low risk
• St. ThomasLow risk
• Stayner (Clearview)Low risk
• StirlingLow risk
• StouffvilleMedium risk
• StratfordMedium risk
• Strathroy-Caradoc - StrathroyLow risk
• StroudLow risk
• Sturgeon FallsLow risk
• Sudbury - David StLow risk
• Sudbury - GarsonLow risk
• Sudbury - WahnapiteiMedium risk
• Sugar Bush (Oro-Medonte)Low risk
• SunderlandLow risk
• Sunsite Estates (Assiginack)Low risk
• Sydenham (South Frontenac)Low risk
• TaraLow risk
• TavistockLow risk
• Tay AreaMedium risk
• TecumsehMedium risk
• Tee Pee Point (Tiny)Low risk
• TeeswaterLow risk
• Temagami NorthLow risk
• Temagami SouthLow risk
• Terrace BayLow risk
• ThamesfordLow risk
• The Maples (Edwardsburgh/Cardinal)Low risk
• ThessalonLow risk
• ThornburyLow risk
• ThorndaleLow risk
• ThorntonLow risk
• Thorold (Decew)Medium risk
• Thorold (Port Robinson)Low risk
• Thorold South EndLow risk
• Thunder Bay (Tiny)Low risk
• TillsonburgLow risk
• TimminsLow risk
• TivertonMedium risk
• TorontoLow risk
• Toronto - F. J. HorganLow risk
• Toronto - R.C.HarrisLow risk
• Toronto - R.L. ClarkLow risk
• Toronto - Toronto IslandLow risk
• TottenhamLow risk
• TrentonLow risk
• Trentview Estates (Asphodel-Norwood)Low risk
• Tri-County (West Elgin)Low risk
• TweedLow risk
• Underwood (Kincardine)Low risk
• Union Area (Kingsville)Low risk
• UxbridgeLow risk
• Val Gagne (Black River-Matheson)Low risk
• Val Harbour (Ramara)Low risk
• Val RitaLow risk
• Valley (Greater Sudbury)Low risk
• Van De Wetering (Central Huron)Low risk
• VanastraLow risk
• Vanier Woods (Tiny)Low risk
• Vankleek HillLow risk
• VarnaLow risk
• Vars (Ottawa)Low risk
• VaughanMedium risk
• Vermilion (Greater Sudbury)Low risk
• Vermilion BayLow risk
• Vermillion (Greater Sudbury)Low risk
• VernerLow risk
• Vespra Downs (Springwater)Low risk
• Victoria PlaceLow risk
• Village Of Point EdwardLow risk
• Virginiatown-KearnsLow risk
• WaldemarMedium risk
• WalkertonLow risk
• WallaceburgLow risk
• Walter'S Falls (Chatsworth)Low risk
• WarkworthLow risk
• WarminsterLow risk
• WarrenLow risk
• WarwickLow risk
• Wasaga BeachLow risk
• WashagoMedium risk
• WaterfordCritical risk
• WaterlooLow risk
• WawaLow risk
• Weca (Adjala-Tosorontio)Low risk
• Welland2 systems · low risk
• WellesleyLow risk
• WellingtonLow risk
• WendoverLow risk
• West ElginLow risk
• West Lambton ShoresLow risk
• West Shore (Severn)Low risk
• Western Trent/Palmina (Kawartha Lakes)High risk
• WestportLow risk
• WheatleyLow risk
• Whippoorwill (Tiny)Low risk
• White RiverLow risk
• WhitechurchLow risk
• WiartonLow risk
• WindsorLow risk
• WinghamLow risk
• Woodfield (Kawartha Lakes)Low risk
• Woodland AcresLow risk
• Woodland Beach (Tiny)Low risk
• WoodstockLow risk
• Woodville (Kawartha Lakes)Low risk
• Woolwich NorthLow risk
• WyevaleLow risk
• Yonge-Green Lane (East Gwillimbury)Low risk
• York - AuroraLow risk
• York - Holland LandingLow risk
• York - King CityLow risk
• York - KleinburgLow risk
• York - NewmarketLow risk
• York - QueensvilleLow risk
• York - StouffvilleLow risk
• York - YorkLow risk
• ZurichLow risk

Ontario towns are rated from the province’s test results for every municipal drinking-water system: the share of bacteria tests that met the standards, and any E. coli results. Other provinces do not publish one dataset like this, so only Ontario is listed.