Most local conservation groups started small with one unifying issue
There may well be a local environmental organization that would be glad to take up your issue and help you get some action. For a list of streamkeeper organizations, check the links at the Pacific Streamkeepers Federation. You can get information on a wide range of environmental and conservation organizations through the B.C. Environmental Network.
Most local conservation groups started small. Someone was concerned about an issue and called a meeting, maybe with the help of friends, to find out if others in the community shared the same concerns. You can do the same. You can often get a meeting space at the local library or recreation centre to hold such a meeting. The local newspaper may have a free space for community meetings. Or they may write a story about your issue and give the time and location of an upcoming meeting.
Get everyone's names, addresses and phone numbers. Decide on a simple action that people can participate in. Get volunteers to take on specific tasks. You may decide to take the issue to your local municipal council. You may choose a delegation to approach a developer, a logging company or a government representative with your concern. You may find that there is an official government consultation on the matter where you can jointly give a presentation. Or there may be a process for giving input into a logging plan, community plan or municipal sewage plan. Get involved! Get your message across!