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Instead of dumping out your unused bleach, check to see if anyone you know personally could use it. You can do this by mentioning it to friends and family in-person or by message, or you can mention it in a social media post. For example, bring the bleach with you when you visit a family member to ask them if they would like the rest of it. Ask places such as churches, local nursing homes, homeless shelters, or food kitchens if they would like donated bleach. You can do this by calling them, sending them an email, or dropping by to ask in person. If you have a favorite local nonprofit, ask them if they could use your extra bleach. Websites such as Craigslist will allow you to post a picture and description of your bleach so that others nearby can come pick it up if they need it. You can also check out websites like Freecycle.org which are dedicated to recycling unused items.  Try posting on a Facebook classifieds page or group to see if anyone could use your extra bleach. Make it clear that the bleach is free and that the container is not completely full.
Ask friends, family members, or neighbors if they need bleach. Check to see if a local organization could use the bleach. Post the bleach on a classifieds page online for someone who needs it.