Water Resources

The Township has a practice of removing the beaver dam at the outlet of Wasi Lake every fall; aiming for the first couple of weeks in October.  This practice was put in place to build capacity for the spring thaw and mitigate the flooding and erosion of multiple roads to the south of the Lake.

DISCLAIMER: The links and content on this page are for information purposes only and may not be the opinion of the Township of Chisholm staff and/or Council.  Any questions about these resources should be directed to the creator of the content and not the municipal office. 


Visit the link below for information on Ice Safety. 

Destination Ontario - Ice Safety



  • Lakes, rivers, and wetlands in Chisholm Township are all regulated by NBMCA. Chisholm has two watersheds, the Wistiwasing River and the Kaibuskong River. Development in or near the regulated area may require permits through the NMBCA. You must obtain permits before starting a project. The Conservation Authority offer FREE pre-consultation visits.
  • Permits
    • Sewage system permit - consultation with one of the On-Site Sewage System Area Supervisors if you are planning to do any of the following:
      • Building a new home or cottage
      • Building an addition with additional bedrooms or adding plumbing fixtures
      • Installing an outhouse, leaching pit or holding tank
      •  Replacing the bed or tank of your existing on-site sewage system
    • DIA Permits (Development, Interference with Wetlands and Alterations to Shorelines and Watercourses - consult with their staff before you do any of the following:
      • Place or excavate fill
      • Build a new home or cottage or replace an existing one
      • construct a home addition, driveway, garage, shed, deck or pool
      • build a shoreline breakwall
      • install a culvert
      • landscape which include filling, re-grading and adding hardscape or retaining walls
  • Source Water Protection Program
    • Mandatory maintenance inspections of on-site sewage system
      • Mandatory Inspections: NBMCA conducts mandatory maintenance inspections of on-site sewage systems identified in the North Bay-Mattawa Source Assessment Report as a significant threat to municipal drinking water sources. The Township of Chisholm is within the Callander Issue Contributing Area(ICA), this area is generally described as lands within 120m of any inflowing stream, river, lake or pond which can result in the input of phosphorus to Callander Bay. The Ontario Building Code requires that these inspections be conducted every five years.  Information about the Source Protection Program is available by visiting


Ministry of Natural Resources and Forestry

  • Forest Fire
  • Hunting and Fishing
  • Ontario’s Invading Species Awareness Program is a partnership between the Ontario Ministry of Natural Resources and Forestry (MNRF), and the Ontario Federation of Anglers and Hunters (OFAH).

Last Confirmed Blue Green Algae in Wasi Lake:

  • August 3, 2023. 


Links to more information

North Bay Parry Sound District Health Unit
Blooms can come and go throughout the season. If a test confirms presence of Blue-Green Algae, signs are posted at the beach and boat launch to inform swimmers that there could be a bloom present.
For more information visit: link opens in a new window

Harmful Algae Blooms FAQ

Ministry of the Environment

  • If you suspect an algae bloom on the lake you can report it to the Spills Action Centre. The Ministry of the Environment will come out and take a sample to be tested for Blue-Green Algae. The Ministry will send the Township the results. It is important to know that once there is a confirmed Blue-Green Algae Bloom, the ministry will not come out and sample the lake again. For more details on Algae blooms visit

Other Resources