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April 21, 2026

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Advisories for Ontario

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Select municipality for details:

MunicipalityTypeSince
1. ALBAN (1) Boil Water 6/27/2024
2. ALGOMA MILLS Boil Water 9/10/2025
3. ALGONQUIN PROV PK Boil Water 8/1/2025
4. ALLENFORD Boil Water 7/25/2025
5. Anishnaabeg of Naongashiing First Nation Boil Water 2/15/2019
6. APSEY LAKE Cyanobacteria Bloom 9/4/2025
7. AYLMER (2) Water Quality Advisory 12/15/2022
8. AYTON Lodge Water Quality Advisory 6/25/2024
9. BASS LAKE Cyanobacteria Bloom 7/18/2025
10. BASS LAKE Boil Water 9/12/2025
11. Baycrest Lodge Boil Water 6/2/2023
12. BAYVIEW ESCARPMENT PROV PK Boil Water 5/25/2024
13. BEARDMORE Boil Water 6/7/2025
14. Bearskin Lake First Nation (2) Boil Water 2/26/2020
15. BEAVERTON Do Not Consume 4/1/2026
16. BELWOOD LAKE Cyanobacteria Bloom 7/23/2025
17. BLACK CREEK PROVINCIAL PARK Boil Water 5/25/2024
18. BLACKSTOCK (Souls Path Retreats Lodge Winter Well) Boil Water 3/25/2025
19. BOURGET Boil Water 8/20/2025
20. BRANTFORD (Lifebridges) Boil Water 6/26/2024
21. BRIGHTON Flooding 4/16/2026
22. BROCKTON Flooding 3/20/2026
23. CABOT HEAD PROVINCIAL PARK Boil Water 5/25/2024
24. Camp Kagama Water Quality Advisory 6/3/2024
25. Campbellford Boil Water 6/4/2020
26. CAMPBELLVILLE Old Diamond Boil Water 8/23/2024
27. CARLING Boil Water 11/11/2025
28. CAT LAKE FIRST NATION Boil Water 3/11/2024
29. CENTERVILLE (1) Boil Water 1/2/2025
30. CENTRAL MANITOULIN Flooding 4/15/2026
31. CHAPLEAU (1) Boil Water 8/10/2023
32. CHAPLEAU (Pellows Best Canadian Fishing) Boil Water 6/2/2025
33. CHAPLEAU-NEMEGOSENDA RIVER PROV PK Boil Water 5/25/2024
34. CHATHAM (Glasshouse Nursery & Garden Centre) Boil Water 12/12/2024
35. Chippewas of Georgina Island First Nation Boil Water 4/24/2017
36. Chippewas of Nawash First Nation Boil Water 1/21/2019
37. Chippewas of Thames First Nation Boil Water 12/14/2021
38. COBDEN (Logos Land Resort SDWS Campground) Boil Water 7/8/2024
39. COBOCONK Boil Water 11/28/2025
40. COBOCONK Boil Water 3/8/2026
41. COCHRANE (North Adventure Inn) Do Not Consume 5/22/2025
42. COLLINGWOOD Spill 4/2/2025
43. Columbus Golf & Country Club Boil Water 5/21/2021
44. COMMANDA LAKE Cyanobacteria Bloom 6/26/2025
45. CONESTOGO LAKE Cyanobacteria Bloom 8/12/2025
46. CORNWALL Boil Water 7/22/2025
47. Deer Lake F|irst Nation Boil Water 10/15/2019
48. Deer Lake First Nation Boil Water 10/21/2019
49. DRACON (GCCA Harmonie) Boil Water 5/17/2024
50. DUNDALK Drinking Water System Water Quality Advisory 1/7/2025
51. DURHAM (1) Water Quality Advisory 3/8/2024
52. Eabametoong First Nation Boil Water 8/1/2001
53. ELLIOT LAKE Boil Water 3/5/2026
54. ESPANOLA (Mountain Cove Lodge) Boil Water 8/14/2024
55. FENELON FALLS Boil Water 9/18/2025
56. Ferme Butte and Bine Boil Water 7/6/2023
57. FOLEYET (Shenango Lodge) Boil Water 8/20/2024
58. Fort Severn First Nation Boil Water 12/24/2025
59. FOXBORO (Belleville Pizzeria / Foxboro General Sto Boil Water 4/12/2025
60. FUSHIMI LAKE PROVINCIAL PARK Boil Water 9/8/2023
61. Gakijiwanong Anishinaabe First Nation Boil Water 1/5/2022
62. Georgian Bluffs Boil Water 8/26/2019
63. GEORGINA Boil Water 4/18/2024
64. Georgina Island Chippewa Boil Water 4/24/2017
65. GORDON LAKE Community Hall Boil Water 9/25/2024
66. GRAND FALLS in ALGOMA Boil Water 8/21/2025
67. GRAND VALLEY Flooding 3/31/2026
68. GRASSY NARROWS FIRST NATION Boil Water 8/9/2024
69. Green Wilderness Lodge Boil Water 8/17/2022
70. Gull Bay First Nation Boil Water 4/30/2009
71. HALI BURTON Boil Water 11/26/2025
72. HAMILTON Do Not Consume 4/1/2026
73. HANOVER (Victory Fellowship Church) Water Quality Advisory 7/3/2024
74. HARCOURT Boil Water 8/4/2024
75. HARCOURT Boil Water 10/10/2025
76. HARTINGTON (Lazy Acre Cottages) Boil Water 6/19/2021
77. HASTINGS Boil Water 8/8/2025
78. HAWK JUNCTION Boil Water 9/17/2025
79. HEARST (1) Boil Water 8/3/2024
80. HEYDEN Boil Water 10/10/2025
81. HILLIER Boil Water 11/6/2025
82. Hoard Station Boil Water 3/31/2023
83. HOLSTEIN (2) Water Quality Advisory 8/22/2024
84. HOPE BAY FOREST PROVINCIAL PARK Boil Water 5/25/2024
85. HUNTSVILLE Flooding 4/15/2026
86. ICARUS LAKE Cyanobacteria Bloom 9/4/2025
87. Inaski Shores Resort Owners Association Boil Water 3/8/2026
88. IRA LAKE PROVINCIAL PARK Boil Water 5/25/2024
89. IRON BRIDGE (Melwel Lodge) Boil Water 8/8/2024
90. Johnston Hrb.-Pine Tree Pt. Prov Park Boil Water 5/25/2024
91. KASHECHEWAN Do Not Consume 2/1/2026
92. KASHECHEWAN Do Not Consume 1/29/2026
93. Kawartha Highland Provincial Park Boil Water 12/17/2020
94. Kee-Way-Win First Nation Boil Water 3/30/2026
95. KENOGAMING LAKE (Thunderstock Outfitters) Boil Water 5/22/2024
96. KENOGAMISIS LAKE Cyanobacteria Bloom 8/20/2025
97. Kicking Mule Ranch Boil Water 9/27/2023
98. KILLBEAR PROVINCIAL PARK Boil Water 5/9/2025
99. KINGSTON - WELL WATER Boil Water 4/16/2026
100. KITCHENER Flooding 4/1/2026
101. KITCHENER Flooding 4/15/2026
102. Kitchenuhmaykoosib Inninuwug First Nation Boil Water 9/12/2025
103. LAKE ASPEY Cyanobacteria Bloom 11/27/2025
104. LAKE NIPISSING Cyanobacteria Bloom 8/12/2025
105. LAKE ONTARIO Cyanobacteria Bloom 8/8/2025
106. LAKE SCUGOG Cyanobacteria Bloom 7/11/2025
107. LAKE ST. JOHN Cyanobacteria Bloom 8/12/2025
108. LAKE TIMISKAMING Cyanobacteria Bloom 7/9/2025
109. LEEs Creek (North Bay) Do Not Consume 2/22/2017
110. LIMER Boil Water 8/21/2025
111. LIONS HEAD PROV PARK Boil Water 5/25/2024
112. LONG BEACH Water System Boil Water 4/10/2006
113. Lost Lake Campground Boil Water 9/2/2022
114. MacLeod Provincial Park Boil Water 11/18/2020
115. MADOC Do Not Consume 12/30/2025
116. MAGNETAWAN Boil Water 9/18/2025
117. Maple Ridge Park Campground Boil Water 5/12/2023
118. MARK S. BURNHAM PROV PK Boil Water 5/25/2024
119. Marten Falls First Nation Boil Water 4/30/2009
120. MARTEN RIVER PROV PK Boil Water 8/16/2025
121. MASSEY Boil Water 4/25/2024
122. MAYNOOTH (Graphite Bible Camp) Do Not Consume 8/9/2024
123. MILFORD Boil Water 10/16/2025
124. MILFORD Boil Water 12/12/2025
125. MILTON (Humes Auction Farm) Do Not Consume 10/2/2024
126. MINDEN Flooding 4/15/2026
127. MINDEN (2) Boil Water 9/29/2025
128. Misery Bay Prov. Park Boil Water 8/1/2023
129. Mishkeegogamang First Nation (2) Boil Water 3/27/2026
130. Mishkeegogamang First Nation (2) Boil Water 12/23/2025
131. Missinaibi Provincial Park Boil Water 8/13/2021
132. MISSISSAUGA Do Not Consume 4/1/2026
133. MOOSONEE Boil Water 3/22/2026
134. Munsee-Delaware First Nation Boil Water 2/24/2024
135. Muskrat Dam Lake Reserve Boil Water 10/24/2003
136. Neskantaga First Nation Boil Water 2/1/1995
137. Newcastle Golf and Country Club Boil Water 5/21/2021
138. Nibinamik First Nation Boil Water 2/5/2013
139. NIPIGON Boil Water 12/28/2025
140. NOELVILLE Boil Water 2/12/2026
141. NORTH BAY Spill 12/4/2024
142. NORTH BAY Flooding 4/17/2026
143. North Caribou Lake Firast Nation Boil Water 3/3/2020
144. NORTH MIDDLESEX (2) Water Quality Advisory 8/23/2024
145. North Spirit Lake First Nation Boil Water 4/5/2019
146. North Spirit Lake Indian reserve Boil Water 4/5/2019
147. OAKVILLE Do Not Consume 9/11/2025
148. OJIBWAY NATION OF SAUGEEN Boil Water 4/1/2026
149. OLIVER PAIPOONGE Do Not Consume 3/9/2023
150. Oneida of The Thames First Nation Boil Water 9/26/2019
151. ORILLIA Flooding 4/16/2026
152. Palmer Rapids - Maplehaus Boil Water 6/13/2023
153. PELEE ISLAND (2) Boil Water 6/25/2024
154. PELEE ISLAND (2) Boil Water 8/28/2025
155. Pembroke - LJs Boil Water 6/10/2023
156. PETAWAWA (Pine Ridge Park & Resort) Boil Water 6/12/2024
157. Pikangikum First Nation Boil Water 2/8/2024
158. Poplar Hill First Nation Boil Water 12/27/2025
159. POTHOLES PROVINCIAL PARK Boil Water 5/25/2024
160. Rainy River First Nation Boil Water 2/6/2024
161. RAMARA Water Quality Advisory 4/1/2025
162. RAMORE Boil Water 2/27/2026
163. RAMSEY LAKE Cyanobacteria Bloom 7/11/2025
164. Rene Brunelle Provincial Park Boil Water 12/4/2020
165. Rideau Ferry Country Home Boil Water 6/12/2024
166. RIDEAU VALLEY Flooding 4/11/2026
167. RIVER VALLEY Outdoor Rink Do Not Consume 2/19/2025
168. ROCK POINT PROV PK Do Not Consume 9/3/2025
169. ROCKY ISLET BAY Cyanobacteria Bloom 8/26/2025
170. ROSENEATH (Langs Family Resort & Marina) Boil Water 8/21/2024
171. RUSCOM RIVER Cyanobacteria Bloom 7/18/2025
172. Russell - Marvelville Community Centre Boil Water 8/15/2023
173. Sandy Lake First Nation Boil Water 10/10/2002
174. SAULT STE. MARIE Boil Water 3/20/2026
175. SEELEY’S BAY Boil Water 7/11/2023
176. Seine River First Nation Boil Water 2/10/2025
177. SEVERN (Coldwater) Spill 4/1/2025
178. Shawanaga First Nation Boil Water 7/11/2024
179. Shelburne Boil Water 7/10/2023
180. Simcoe Water Quality Advisory 7/28/2017
181. Slate Falls First Nation Boil Water 6/23/2023
182. Smokey Head-White Bluff Prov Pk Boil Water 5/25/2024
183. SOUTH STORMONT TWP Do Not Consume 3/5/2026
184. SPRING BAY (Freds Camp) Boil Water 9/7/2024
185. ST JACOBS Flooding 3/31/2026
186. ST. JOSEPH ISLAND (Jocelyn Twp Community Hall) Boil Water 4/9/2025
187. STAR LAKE Cyanobacteria Bloom 7/2/2025
188. SUDBURY Flooding 4/19/2026
189. SUNDRIDGE (Zion United Church) Do Not Consume 10/31/2024
190. The Shoals Prov. Park Boil Water 5/25/2024
191. THOMASBURG Do Not Consume 12/30/2025
192. THORNE Boil Water 7/31/2025
193. THREE MILE LAKE Cyanobacteria Bloom 8/12/2025
194. Timberwolf Lodge Restaurant Boil Water 7/22/2022
195. TIMMINS Boil Water 3/15/2026
196. TWEED (2) Do Not Consume 9/24/2025
197. Twp of SELWYN (Condo Corp 949 Sharon Court) Water Quality Advisory 3/10/2025
198. UPPER ISLAND LAKE Cyanobacteria Bloom 9/17/2025
199. VICTORIA HARBOUR Municipal WS Boil Water 7/8/2024
200. VIRGINIATOWN Boil Water 2/20/2026
201. Wabauskang First Nation Boil Water 5/16/2025
202. WAINFLEET Boil Water 4/10/2006
203. WAKOMATA Boil Water 10/1/2025
204. WARREN Water System Boil Water 1/15/2024
205. WASI LAKE Cyanobacteria Bloom 8/12/2025
206. Wawakapewin First Nation Boil Water 7/21/2023
207. WEST MONTROSE Flooding 4/15/2026
208. WEST MONTROSE Flooding 3/31/2026
209. WEST NIPISSING Flooding 4/19/2026
210. What The Fries Boil Water 5/23/2023
211. White Lake Provincial Park Boil Water 5/18/2024
212. WHITESAND FIRS NATION Boil Water 6/17/2025
213. WHITESTONE LAKE Cyanobacteria Bloom 9/17/2025
214. WOLSELEY BAY Cyanobacteria Bloom 12/9/2025
215. WOODVILLE Boil Water 11/7/2025
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