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October 1, 2026

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Advisories for Ontario

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MunicipalityTypeSince
1. ALGOMA MILLS Boil Water 9/10/2025
2. ALGONQUIN HIGHLANDS Boil Water 6/5/2026
3. ALGONQUIN HIGHLANDS Boil Water 8/31/2026
4. ALGONQUIN PROV PK Boil Water 5/1/2026
5. ALLENFORD Boil Water 7/25/2025
6. Anishnaabeg of Naongashiing First Nation Boil Water 2/15/2019
7. APSEY LAKE Cyanobacteria Bloom 9/4/2025
8. ATIKOKAN Boil Water 7/16/2026
9. AYLMER (2) Water Quality Advisory 12/15/2022
10. AYTON Lodge Water Quality Advisory 6/25/2024
11. BASS LAKE Boil Water 9/12/2025
12. BASS LAKE Cyanobacteria Bloom 7/18/2025
13. BATCHAWANA BAY Boil Water 6/8/2026
14. BAYVIEW ESCARPMENT PROV PK Boil Water 5/25/2024
15. BEARDMORE Boil Water 6/7/2025
16. Bearskin Lake First Nation (2) Boil Water 2/26/2020
17. BEAVERTON Do Not Consume 4/1/2026
18. BELWOOD LAKE Cyanobacteria Bloom 7/23/2025
19. BEWDLEY Boil Water 8/24/2026
20. BLACK CREEK PROVINCIAL PARK Boil Water 5/25/2024
21. BLACKSTOCK (Souls Path Retreats Lodge Winter Well) Boil Water 3/25/2025
22. BOBCAYGEON Boil Water 8/25/2026
23. BOURGET Boil Water 8/20/2025
24. BRANTFORD (Lifebridges) Boil Water 6/26/2024
25. BROOKLIN Boil Water 5/11/2026
26. BRUCE MINES Boil Water 5/8/2026
27. CABOT HEAD PROVINCIAL PARK Boil Water 5/25/2024
28. CAMERON Boil Water 8/24/2026
29. Camp Kagama Water Quality Advisory 6/3/2024
30. Campbellford Boil Water 6/4/2020
31. CAMPBELLVILLE Old Diamond Boil Water 8/23/2024
32. CARLING Boil Water 11/11/2025
33. CAT LAKE FIRST NATION Boil Water 3/11/2024
34. CENTERVILLE (1) Boil Water 1/2/2025
35. CHAPLEAU (1) Boil Water 8/10/2023
36. CHAPLEAU (Pellows Best Canadian Fishing) Boil Water 6/2/2025
37. CHAPLEAU OJIBWAY FIRST NATION Boil Water 8/28/2026
38. CHAPLEAU-NEMEGOSENDA RIVER PROV PK Boil Water 5/25/2024
39. CHATHAM (Glasshouse Nursery & Garden Centre) Boil Water 12/12/2024
40. Chippewas of Georgina Island First Nation Boil Water 4/24/2017
41. Chippewas of Nawash First Nation Boil Water 1/21/2019
42. Chippewas of Thames First Nation Boil Water 12/14/2021
43. COBDEN (Logos Land Resort SDWS Campground) Boil Water 7/8/2024
44. COBOCONK Boil Water 11/28/2025
45. COCHRANE (North Adventure Inn) Do Not Consume 5/22/2025
46. COLBORNE Boil Water 9/18/2026
47. COLLINGWOOD Spill 4/2/2025
48. Columbus Golf & Country Club Boil Water 5/21/2021
49. COMMANDA LAKE Cyanobacteria Bloom 6/26/2025
50. CONESTOGO LAKE Cyanobacteria Bloom 8/12/2025
51. CORNWALL Boil Water 7/22/2025
52. Deer Lake F|irst Nation Boil Water 10/15/2019
53. DEER LAKE FIRST NATION (2) Boil Water 7/29/2026
54. DOG LAKE Cyanobacteria Bloom 8/5/2026
55. DOG LAKE Cyanobacteria Bloom 8/5/2026
56. DOG LAKE-BOLDUC BAY Cyanobacteria Bloom 7/25/2026
57. DOKIS FIRST NATION Boil Water 6/24/2026
58. DRACON (GCCA Harmonie) Boil Water 5/17/2024
59. DUNDALK Drinking Water System Water Quality Advisory 1/7/2025
60. DUNSFORD Boil Water 8/26/2026
61. DURHAM (1) Water Quality Advisory 3/8/2024
62. Eabametoong First Nation Boil Water 8/1/2001
63. EAGLE LAKE Cyanobacteria Bloom 9/4/2026
64. ELLIOT LAKE Boil Water 8/31/2026
65. ELLIOTT LAKE Cyanobacteria Bloom 8/5/2026
66. ESPANOLA (Mountain Cove Lodge) Boil Water 8/14/2024
67. FENELON FALLS Boil Water 6/18/2026
68. FOLEYET (Shenango Lodge) Boil Water 8/20/2024
69. FORT ALBANY FIRST NATION Boil Water 5/9/2026
70. FOXBORO (Belleville Pizzeria / Foxboro General Sto Boil Water 4/12/2025
71. FUSHIMI LAKE PROVINCIAL PARK Boil Water 6/1/2026
72. Gakijiwanong Anishinaabe First Nation Boil Water 1/5/2022
73. Georgian Bluffs Boil Water 8/26/2019
74. GEORGINA Boil Water 4/18/2024
75. Georgina Island Chippewa Boil Water 4/24/2017
76. GORDON LAKE Community Hall Boil Water 9/25/2024
77. GRAFTON Boil Water 9/1/2026
78. GRAND FALLS in ALGOMA Boil Water 8/21/2025
79. GRASSY NARROWS FIRST NATION Boil Water 8/9/2024
80. Green Wilderness Lodge Boil Water 8/17/2022
81. Gull Bay First Nation Boil Water 4/30/2009
82. HALI BURTON Boil Water 11/26/2025
83. HAMILTON Boil Water 5/24/2026
84. HAMILTON Do Not Consume 4/1/2026
85. HANOVER Boil Water 5/11/2026
86. HANOVER (Victory Fellowship Church) Water Quality Advisory 7/3/2024
87. HARCOURT Boil Water 8/20/2026
88. HARTINGTON (Lazy Acre Cottages) Boil Water 6/19/2021
89. HASTINGS Boil Water 8/8/2025
90. HAWK JUNCTION Boil Water 9/17/2025
91. HAWKESBURY Boil Water 9/10/2026
92. HAWKEYE LAKE Cyanobacteria Bloom 7/29/2026
93. HAWKEYE LAKE Cyanobacteria Bloom 9/1/2026
94. HEARST (1) Boil Water 8/3/2024
95. HEYDEN Boil Water 5/15/2026
96. HILLIER Boil Water 11/6/2025
97. HOLSTEIN (2) Water Quality Advisory 8/22/2024
98. HOPE BAY FOREST PROVINCIAL PARK Boil Water 5/25/2024
99. ICARUS LAKE Cyanobacteria Bloom 9/4/2025
100. INGERSOLL Boil Water 8/5/2026
101. IRA LAKE PROVINCIAL PARK Boil Water 5/25/2024
102. IRON BRIDGE Boil Water 5/8/2026
103. IRON BRIDGE (Melwel Lodge) Boil Water 8/8/2024
104. IROQUOIS Boil Water 5/15/2026
105. Johnston Hrb.-Pine Tree Pt. Prov Park Boil Water 5/25/2024
106. Kawartha Highland Provincial Park Boil Water 12/17/2020
107. Kee-Way-Win First Nation Boil Water 3/30/2026
108. KENOGAMING LAKE (Thunderstock Outfitters) Boil Water 5/22/2024
109. KENOGAMISIS LAKE Cyanobacteria Bloom 8/20/2025
110. Kicking Mule Ranch Boil Water 9/27/2023
111. KILLBEAR PROVINCIAL PARK Boil Water 5/9/2025
112. KINGSTON Boil Water 8/6/2026
113. KINGSTON - WELL WATER Boil Water 4/16/2026
114. KINGSVILLE Boil Water 7/26/2026
115. KINMOUNT Boil Water 8/24/2026
116. KIRKFIELD Boil Water 6/2/2026
117. LAKE ASPEY Cyanobacteria Bloom 11/27/2025
118. LAKE NIPISSING Cyanobacteria Bloom 8/12/2025
119. LAKE NOSBONSING Cyanobacteria Bloom 8/21/2026
120. LAKE ONTARIO Cyanobacteria Bloom 8/8/2025
121. LAKE SCUGOG Cyanobacteria Bloom 7/11/2025
122. LAKE ST. JOHN Cyanobacteria Bloom 8/12/2025
123. LAKE SUPERIOR PROV PK Boil Water 5/7/2026
124. LAKE TIMISKAMING Cyanobacteria Bloom 7/9/2025
125. LEEs Creek (North Bay) Do Not Consume 2/22/2017
126. LEFAIVRE Do Not Consume 7/16/2026
127. LIMER Boil Water 8/21/2025
128. LINCOLN Flooding 8/4/2026
129. LINDSAY Boil Water 9/27/2026
130. LIONS HEAD PROV PARK Boil Water 5/25/2024
131. LONG BEACH Water System Boil Water 4/10/2006
132. Lost Lake Campground Boil Water 9/2/2022
133. MacLeod Provincial Park Boil Water 11/18/2020
134. MADOC Do Not Consume 12/30/2025
135. MAGNETAWAN Boil Water 9/18/2025
136. Maple Ridge Park Campground Boil Water 5/12/2023
137. MARK S. BURNHAM PROV PK Boil Water 5/25/2024
138. Marten Falls First Nation Boil Water 4/30/2009
139. MARTEN RIVER PROV PK Boil Water 8/16/2025
140. MASSEY Boil Water 4/25/2024
141. MAYNOOTH (Graphite Bible Camp) Do Not Consume 8/9/2024
142. MILFORD Boil Water 12/12/2025
143. MILFORD Boil Water 10/16/2025
144. MILTON (Humes Auction Farm) Do Not Consume 10/2/2024
145. MINDEN (2) Boil Water 4/30/2026
146. Misery Bay Prov. Park Boil Water 8/1/2023
147. MISHKEEGOGAMANG FIRST NATION Boil Water 3/22/2026
148. Mishkeegogamang First Nation (2) Boil Water 8/7/2026
149. Missinaibi Provincial Park Boil Water 6/24/2026
150. MISSISSAUGA Do Not Consume 4/1/2026
151. MORAVIAN OF THE THAMES FIRST NATION Boil Water 7/6/2026
152. Munsee-Delaware First Nation Boil Water 2/24/2024
153. Muskrat Dam Lake Reserve Boil Water 10/24/2003
154. Neskantaga First Nation Boil Water 2/1/1995
155. Newcastle Golf and Country Club Boil Water 5/21/2021
156. NIAGARA ON THE LAKE Flooding 7/28/2026
157. Nibinamik First Nation Boil Water 2/5/2013
158. NOELVILLE Boil Water 2/12/2026
159. NORTH BAY Flooding 7/27/2026
160. NORTH BAY Spill 12/4/2024
161. North Caribou Lake First Nation Boil Water 3/3/2020
162. NORTH MIDDLESEX (2) Water Quality Advisory 8/23/2024
163. North Spirit Lake Indian reserve Boil Water 4/5/2019
164. OAKLAND Boil Water 6/6/2026
165. OAKVILLE Do Not Consume 9/11/2025
166. OLIVER PAIPOONGE Do Not Consume 3/9/2023
167. ONAPING Boil Water 6/3/2026
168. Oneida of The Thames First Nation Boil Water 9/26/2019
169. ORLEANS -Fallingbrook elementary School Do Not Consume 5/8/2026
170. Palmer Rapids - Maplehaus Boil Water 6/13/2023
171. PELEE ISLAND Boil Water 6/25/2024
172. PELEE ISLAND (2) Boil Water 8/28/2025
173. Pembroke - LJs Boil Water 6/10/2023
174. PETERBOROUGH Boil Water 7/27/2026
175. Pikangikum First Nation Boil Water 2/8/2024
176. PLANTAGENET Boil Water 9/25/2026
177. PORT HOPE Boil Water 9/11/2026
178. PORTAGE LAKE Cyanobacteria Bloom 9/4/2026
179. POTHOLES PROVINCIAL PARK Boil Water 5/25/2024
180. PUKASKWA NATIONAL PARK Boil Water 5/15/2026
181. PUKASKWA NATIONAL PARK Cyanobacteria Bloom 9/1/2026
182. PUKASKWA NATIONALPARK Cyanobacteria Bloom 8/17/2026
183. RAINY RIVER FIRST NATION Boil Water 9/4/2026
184. RAMARA Water Quality Advisory 4/1/2025
185. RAMORE Boil Water 2/27/2026
186. RAMSEY LAKE Cyanobacteria Bloom 7/11/2025
187. Rene Brunelle Provincial Park Boil Water 6/6/2026
188. Rideau Ferry Country Home Boil Water 6/12/2024
189. RIVER VALLEY Outdoor Rink Do Not Consume 2/19/2025
190. ROCK POINT PROV PK Boil Water 5/13/2026
191. ROCKY ISLET BAY Cyanobacteria Bloom 8/26/2025
192. ROSENEATH (Langs Family Resort & Marina) Boil Water 8/21/2024
193. RUSCOM RIVER Cyanobacteria Bloom 7/18/2025
194. Sandy Lake First Nation Boil Water 10/10/2002
195. SAULT STE. MARIE Boil Water 3/20/2026
196. SEELEY’S BAY Boil Water 7/11/2023
197. SEINE RIVER FIRST NATION Boil Water 2/10/2025
198. SELWYN Boil Water 8/24/2026
199. SEVERN (Coldwater) Spill 4/1/2025
200. Shawanaga First Nation Boil Water 7/11/2024
201. Shelburne Boil Water 7/10/2023
202. Simcoe Water Quality Advisory 7/28/2017
203. SIX NATIONS OF THE GRAND RIVER FIRST NATION Boil Water 7/9/2026
204. Slate Falls First Nation Boil Water 6/23/2023
205. Smokey Head-White Bluff Prov Pk Boil Water 5/25/2024
206. SOUTH STORMONT TWP Do Not Consume 3/5/2026
207. SPRING BAY (Freds Camp) Boil Water 9/7/2024
208. ST CATHARINES Flooding 8/4/2026
209. STAR LAKE Cyanobacteria Bloom 7/2/2025
210. SUNDRIDGE (Zion United Church) Do Not Consume 10/31/2024
211. The Shoals Prov. Park Boil Water 5/25/2024
212. THOMASBURG Do Not Consume 12/30/2025
213. THORNE Boil Water 7/31/2025
214. THREE MILE LAKE Cyanobacteria Bloom 8/12/2025
215. THUNDER BAY - BATWING LAKE Cyanobacteria Bloom 8/28/2026
216. Timberwolf Lodge Restaurant Boil Water 7/22/2022
217. TIMMINS Boil Water 9/2/2026
218. TRENT LAKES Boil Water 8/15/2026
219. TWEED (2) Do Not Consume 9/24/2025
220. UPPER ISLAND LAKE Cyanobacteria Bloom 9/17/2025
221. VANKLEEK HILL Boil Water 7/16/2026
222. VICTORIA HARBOUR Municipal WS Boil Water 7/8/2024
223. WABASEEMOONG FIRST NATION Boil Water 4/20/2026
224. WABAUSKANG FIRST NATION Boil Water 5/16/2026
225. WABIGOON LAKE Ojibway Nation Boil Water 5/4/2026
226. WAINFLEET Boil Water 4/10/2006
227. WAKOMATA Boil Water 10/1/2025
228. WARREN Water System Boil Water 1/15/2024
229. WASI LAKE Cyanobacteria Bloom 8/12/2025
230. Wauzhushk Onigum first Nation Boil Water 9/9/2026
231. WAWA Boil Water 8/20/2026
232. Wawakapewin First Nation Boil Water 7/21/2023
233. What The Fries Boil Water 5/23/2023
234. White Lake Provincial Park Boil Water 6/20/2026
235. WHITESAND FIRST NATION Boil Water 6/8/2026
236. WHITESTONE LAKE Cyanobacteria Bloom 9/17/2025
237. WOLSELEY BAY Cyanobacteria Bloom 9/29/2026
238. WOLSELEY BAY Cyanobacteria Bloom 12/9/2025
239. WOODVILLE Boil Water 9/4/2026
240. WOODVILLE Boil Water 11/7/2025
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