Water history has two different historical standards: 1. First come, first served. 2. Don't screw the people downstream. From what I gather, different places

Water history has two different historical standards: 1. First come, first served. 2. Don't screw the people downstream. From what I gather, different places typically use one or the other standard. In California, both tests are part of the law, which makes things complicated. A lot of water law in California was hashed out historically in Fresno County.