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