In fairness, I think it's not so much the water as the bottles that go bad. That type of plastic is not easily biodegradable, but it is photosensitive, and it w

In fairness, I think it's not so much the water as the bottles that go bad. That type of plastic is not easily biodegradable, but it is photosensitive, and it weakens over long-term exposure to light. As the bottles break down, they leach toxic chemicals into the water and also lose structural integrity.