The measure has broad support from such diverse groups as National Wildlife Federation, California Chamber of Commerce, the Planning and Conservation League, Agricultural Council of California, Community Water Center and hundreds of others. Locally, the American River Parkway Foundation, American River Conservancy, Sacramento Area Flood Control Agency and the Sacramento Urban Streams Council also urge voters to support Proposition 3.

https://www.sacbee.com/opinion/op-ed/soapbox/article219081685.html

The measure, Proposition 3, has divided the environmental community and drawn criticism from local newspapers, who say it would benefit wealthy farmers and agribusiness. From a San Francisco Chronicle editorial:

This scheme was devised as an initiative that is being funded, in part, by individuals and entities that are going to be receiving a share of the bond money. The pay-to-play aspect in itself should give voters ample reason to reject Prop. 3.

https://www.kqed.org/science/1932078/the-8-9-million-california-water-bond-that-has-environmentalists-divided