It is not universally illegal to capture rainwater, but regulations vary significantly by state and locality in the U.S., with some places requiring permits or limiting the amount collected.
Is it illegal to capture rain water?

FactVerify
Source: factverify.com
Key Evidence
Utah requires registration for collecting more than 200 gallons of rainwater.
waterrights.utah.govwaterrights.utah.govRainwater Harvesting Registration
quora.comquora.comAccording to the law in States like Oregon is it illegal to have a cup or barrel...
Oregon allows limited rain barrel use without permits.
cbsnews.comcbsnews.comIs It Really Illegal To Collect Rain Water In Oregon?
4perfectwater.com4perfectwater.comRainwater Harvesting Laws You Need to Know About (2023)
California legalized rainwater harvesting under specific regulations in 2012.
Many states have no restrictions or only minor regulations on rainwater collection.
What the Evidence Shows
The claim 'Is it illegal to capture rain water? ' requires nuance because legality depends on jurisdiction. In the United States, all 50 states allow private land ownership, but rainwater collection is regulated at the state or local level rather than federally.
For example, Utah allows residents to collect up to 200 gallons of rainwater without registration, but collecting more requires registration and approval from the Utah Division of Water Rights.waterrights.utah.govwaterrights.utah.govRainwater Harvesting Registration
quora.comquora.comAccording to the law in States like Oregon is it illegal to have a cup or barrel... Oregon has a reputation for strict water rights laws, but it is not illegal to collect rainwater in small quantities; residents can use up to two rain barrels with a combined capacity of 110 gallons without a permit.
cbsnews.comcbsnews.comIs It Really Illegal To Collect Rain Water In Oregon?
4perfectwater.com4perfectwater.comRainwater Harvesting Laws You Need to Know About (2023)
In Georgia, it is legal to collect rainwater for outdoor use without regulation. California passed legislation in 2012 legalizing rainwater capture as long as it complies with state requirements. Some states like Tennessee have no regulations limiting how much rainwater can be collected.
The complexity arises from western U.S. States where water rights are tightly controlled due to scarcity, leading to myths and misunderstandings about legality.wsav.comwsav.comIs it legal to collect rainwater in Georgia? Overall, while capturing rainwater is generally legal, compliance with local laws and limits is necessary. The claim that it is outright illegal is misleading without specifying location and context.