Is it Illegal to Collect Rainwater: 2021 Complete State Guide

Jeremiah Castelo Rainwater Harvesting 7 Comments

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With stories of individuals facing legal consequences for their rainwater harvesting endeavors in some states, the idea of rainwater harvesting being an illegal activity has quickly gained traction across the internet.

But is it illegal to collect rainwater or have some of these stories been exaggerated?

The short answer is that rainwater harvesting is not illegal.

The longer answer is that there are no federal laws that restrict rainwater harvesting, and while there are some states that have strict regulations, most states allow their residents to collect rainwater freely.

In this article, we’ll dig deeper into the legality of rainwater harvesting and provide information on the specific laws for each state.

Is it Illegal to Collect Rainwater?


US citizens who want to set up a rainwater harvesting system on their property can do so without the fear of legal consequences provided that they adhere to their state's guidelines.

The Federal Government does not have any restrictions on rainwater harvesting.

Some states have regulations in terms of the amount of rainwater collecting and the means by which it is collected, but most states allow their citizens to collect rainwater freely while others even encourage it.

Some government restriction on rainwater harvesting is based on the rationale that it may disrupt the hydrologic cycle.

It's been believed that the collection of rainwater would halt the rainfall’s natural flow into the earth’s aquifers and streams. However, a study published by the Scientific World Journal shows that the amount of rainwater collected by individual homes would have little to no effect on the hydrologic cycle on a macro-level. In fact, since most collected rainwater would be used for gardening and household purposes, the water would eventually be returned to the ground anyway.

Other reasons for government restriction are based on old laws known as prior appropriation, which were implemented as a first-come, first-serve basis for settlers in the Old West.

Organizations such as the American Rainwater Catchment Systems Association (ARCSA) work with state governments in making rainwater collection an available option for its citizens.

Most states have shifted their laws in favor of private rainwater harvesting. Colorado, the state with arguably the strictest rainwater harvesting laws, passed a bill in 2016 allowing for the collection of rainwater with a 110-gallon maximum capacity.

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Rainwater Collecting Laws for Each State


While rainwater collecting is Federally legal, it is worth observing the state regulations, if any, for limitations and guidelines. The information gathered for this article was taken from state websites and legislative documents and was current at the time of publication. We will do our best to keep this list updated. But because laws are constantly changing, please check with your state for further information.


Alabama: no regulation

The State of Alabama considers rainwater harvesting a private property right. There are currently no regulations for rainwater harvesting in the state. In fact, Alabama A&M and Auburn University extension services published a document encouraging the practice of rainwater collection, providing technical instructions and guidelines.


Alaska: no regulation

The State of Alaska does not restrict rainwater harvesting as it is a primary source of water for many residents. Groundwater harvesting, however, is regulated and can be purchased as a water right. Due to the cold climate, certain precautions may need to be considered when collecting rainwater in Alaska.


Arizona: no regulation

Rainwater harvesting is legal in Arizona. Two House Bills, 2363 and 2830, support this. House Bill 2363 establishes a joint legislative study committee on macro-harvested rainwater, allowing for the study and evaluation of scientific data, costs and benefits, and potential impact on water rights. House Bill 2830, through the Department of Water Resources, allows for a city or town to establish a fund for rainwater harvesting systems.


Arkansas: some regulation

The State of Arkansas allows for rainwater harvesting with some minor restrictions. According to Arkansas Code Annotated § 17-38-201 (2014), the State Board of Health “shall allow the use of a harvested rainwater system used for a non-potable purpose if the harvested rainwater system is: (1) designed by a professional engineer licensed in Arkansas; (2) is designed with appropriate cross-connection safeguards; and (3) complies with Arkansas Plumbing Code.”


California: some regulation

In 2012, the State of California passed Assembly Bill 1750, which enacted the Rainwater Capture Act of 2012, making it legal to collect rainwater so long as in compliance with the California State Water Resources Board requirements. The Bill states that residential, commercial and governmental landowners may install, maintain, and operate rain barrel systems and rainwater capture systems for specified purposes.


 Colorado: some regulation

Colorado has traditionally been one of the most restrictive states for rainwater harvesting. Two laws were passed in 2009 which loosened restrictions on rainwater collection, allowing residents to use rainwater for non-potable purposes. In 2016, House Bill 16-1005 was passed, allowing residents to collect rainwater from a catchment system on their rooftops into two rain barrels, with a combined capacity of 110 gallons. The collected rain must be used on the property where it is collected and may only be used for outdoor purposes such as lawn irrigation and gardening.


Connecticut: no regulation

The State of Connecticut currently does not have any restrictions on rainwater harvesting. In fact, a document released by the Connecticut Department of Energy and Environmental protection encourages its citizens to collect rainwater.


 Delaware: no regulation

The State of Delaware does not have any laws prohibiting rainwater collection but in fact sponsors incentive programs encouraging it.


 Florida: no regulation

Rainwater collection is highly encouraged in the State of Florida with tax incentives and rebate programs being offered by several local municipalities including Manatee County.


 Georgia: some regulation

Rainwater harvesting is legal in Georgia but closely regulated by the Department of Natural Resources in the Environmental Protection Division. According to their plumbing code, rainwater harvesting is legal as long as it is used for outdoors only.


 Hawaii: no regulation

The State of Hawaii does not have any restrictions on rainwater harvesting but in fact highly encourages it. Overseen by the Department of Health and Safety, Senate Concurrent Resolution 172 encourages county water boards to study and promote rainwater collection.


 Idaho: no regulation

Idaho does not have any regulations on rainwater capture except for rainwater which has entered natural waterways.


 Illinois: some regulation

Rainwater harvesting is legal in Illinois but with two major statutes. The Green Infrastructure for Clean Water Act which relates to water conservation, efficiency, infrastructure, and management while promoting rainwater harvesting. House Bill 991 (2011) amended the Homeowners’ Solar Rights Act. It requires that within 120 days after a homeowners’ association, the association shall adopt an energy policy statement regarding: (i) the location, design, and architectural requirements of solar energy systems; and (ii) whether a wind energy collection, rain water collection, or composting system is allowed, and, if so, the location, design, and architectural requirements of those systems.


 Indiana: no regulation

Rainwater harvesting is legal in Indiana. The State government encourages the act of rainwater collection and even has useful information on rain barrels on their website.


 Iowa: no regulation

Iowa has no regulations on rainwater collection. The Iowa Department of Natural Resources provides information on stormwater on their website.


 Kansas: some regulation

It is legal to harvest rainwater in Kansas, but a permit issued by the Department of Agriculture may be required. The Kansas Water Appropriation Act protects the people's rights to harvest rainwater if used for anything other than domestic purposes.


 Kentucky: no regulation

Kentucky does not have any restrictions on rainwater collection. Information on how to construct a rain barrel can be found on their website.


 Louisiana: no regulation

Rainwater collection is legal in Louisiana and in fact, encouraged.


 Maine: no regulation

There are no regulations for rainwater harvesting in the State of Maine. Some cities such as Portland, issue stormwater fees to pay for improved stormwater systems for the city.


 Maryland: no regulation

Rainwater harvesting is legal in Maryland. Certain counties and institutions offer incentives for rainwater collection.


Massachusetts: no regulation

Rainwater harvesting is legal and encouraged by the State of Massachusetts.


 Michigan: no regulation

Under the Cost Effective Governmental Energy Use Act, rainwater harvesting, along with other cost-efficient procedures, is legal and encouraged in the state of Michigan.


 Minnesota: no regulation

Rainwater harvesting is legal and encouraged in the State of Minnesota.


Mississippi: no regulation

Rainwater harvesting is legal and encouraged in the State of Mississippi.


Missouri: no regulation

Rainwater harvesting is legal in Missouri and highly encouraged.


 Montana: no regulation

Rainwater harvesting is legal in Montana and highly encouraged.


 Nebraska: no regulation

Rainwater harvesting is legal in Nebraska and is in fact promoted by many Universities.


 Nevada: some regulation

Nevada passed NB74 in June 2017, allowing for the collection of rainwater under the grant of a water right. Water rights must be used for its intended purpose or risk being revoked. Assembly Bill 198 states the Legislative Committee on Public Lands will conduct studies on water conservation and alternative sources of water for communities in the State. This includes a comprehensive review of alternative sources of water, including capturing rainwater amongst other things.


 New Hampshire: no regulation

Rainwater harvesting is completely legal in New Hampshire and is in fact encouraged by the state.


 New Jersey: no regulation

Rainwater harvesting is legal in New Jersey. Assembly Bill 2442 requires the Department of Environmental Protection to establish a Capture, Control, and Conserve Reward Rebate Program, which will use funds appropriated for water conservation to provide rebates for property owners who implement eligible water capture, control or conserve techniques on their property.


 New Mexico: no regulation

Rainwater harvesting is legal and highly encouraged in the State of New Mexico.


 New York: no regulation

Rainwater harvesting is legal, encouraged, and even taught in the State of New York.


 North Carolina: some regulation

Rainwater harvesting is legal in North Carolina, however, there are two laws regulating it. House Bill 609 (2011) says that the Department of Environment and Natural Resources will provide statewide assistance on water efficiency and will ensure best management practices for conservation, which include water reuse and harvesting rainwater. Senate Bill 163 (2014) recognizes the benefits of rainwater for the future water supply of the state.


 North Dakota: no regulation

While North Dakota does have some strict laws regarding other water sources, rainwater harvesting is legal and encouraged.


 Ohio: some regulation

Rainwater harvesting is legal in Ohio, even for potable purposes. Ohio Rev. Code §3701.344 states that private water systems that provide drinking water to fewer than twenty-five people are regulated by the Ohio Department of Health.


 Oklahoma: no regulation

Rainwater harvesting is legal in Oklahoma. Under House Bill 3055, the Water for 2060 Act initiates grants for water conservation projects, to serve as models for other communities in the state. These projects may include community conservation demonstration projects, recycling and reuse of water, and information campaigns on capturing harvested rainwater.


 Oregon: some regulation

Rainwater harvesting is legal in Oregon, but may only be collected from a catchment system on rooftop surfaces.  The state gives some approval for alternate methods of construction of rainwater harvesting systems, but legal advice should be sought before attempting to construct any system on private property.


 Pennsylvania: no regulation

Rainwater collecting is legal in Pennsylvania and is in fact encouraged by State Universities.


 Rhode Island: no regulation

Rhode Island provides incentives for those who harvest rainwater. House Bill 7070 (2012) creates a tax credit to individuals or businesses for the installation of a cistern to collect rainwater. A state income tax credit of 10 percent of the cost of installing the cistern is credited to those who participate. A cistern is defined as a container holding fifty or more gallons of diverted rainwater or snow melt, either above or below ground.


 South Carolina: no regulation

It is completely legal to harvest rainwater in South Carolina, and is in fact encouraged by the state.


 South Dakota: no regulation

While South Dakota does have quite a few statutes on water rights, rainwater harvesting is completely legal.


 Tennessee: no regulation

Rainwater harvesting is legal in Tennessee. SB 2417 / HB 1850 (Enacted) allows for the use of green infrastructure practices which includes rainwater harvesting systems.


 Texas: some regulation

It is legal to harvest rainwater in Texas. There are several provisions in House Bill 3391 which should be noted, such as the requirement the catchment system being incorporate into the design of the building and the requirement to give a written notice to the municipality.


 Utah: some regulation

The State of Utah authorizes the direct collection of rainwater on land owned or leased by the person responsible for the collection. According to Senate Bill 32 (2010), a person registered with the Division of Water Resources cannot store more than 2,500 gallons of rainwater. If unregistered, no more than two containers may be used, and the maximum capacity of any one container may not exceed 100 gallons (Utah Code Ann. §73-3-1.5)


 Vermont: no regulation

Rainwater collection is legal in the State of Vermont.


 Virginia: no regulation

Senate Bill 1416 (2001) established the Alternative Water Supply Assistance Fund, providing an income tax credit to those who install rainwater harvesting systems. The State of Virginia also requires the development of rainwater harvesting guidelines to reduce demands on water supply systems and to promote conservation (Va. Code § 32.1-248.2).


 Washington: no regulation

Rainwater collection is legal in the State of Washington and even authorizes counties to reduce rates for stormwater control facilities that utilize rainwater harvesting, by 10 percent or more according to Wash. Rev. Code §36.89.080. The Washington Department of Ecology issued an Interpretive Policy Statement clarifying that a water permit is not required for rooftop rainwater harvesting.


 West Virginia: no regulation

Rainwater harvesting is legal in West Virginia.


 Wisconsin: no regulation

Rainwater harvesting is legal in Wisconsin.


 Wyoming: no regulation

Rainwater harvesting is legal in Wyoming.


Rainwater collection is a great way to conserve water and is legal in every state save for a few with specific regulations. The few states that do have regulations are fairly easy to comply with while still being able to collect a usable amount of water. Due to the shifting climate of legislation, please always double-check with your state legislature for the most recent laws.

Thank you for taking the time to read our article on answering the question: is it illegal to collect rainwater? We'd love to hear your feedback in the comments section below. If you've found this article to be useful and are interested in learning more, be sure to sign up for our newsletter.

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Read Also

References (n.d.). Rainwater Harvesting Regulations Map | Department of Energy. Retrieved from

Enlight Inc. (n.d.). Rainwater harvesting regulations state by state | Rain water harvesting and slow sand water filters. Retrieved from

Find Law. (n.d.). Water Rights Law: Prior Appropriation - FindLaw. Retrieved from

NCBI. (2014, February 18). Sustainability of Rainwater Harvesting System in terms of Water Quality. Retrieved from

NCSL. (2018, February 2). State Rainwater Harvesting Laws and Legislation. Retrieved from

Perfect Water. (2018, September 13). Rainwater Harvesting Laws You Need to Know About | PerfectWater? Retrieved from

Pioneer Water Tanks. (2018, May 31). Is it illegal to collect rainwater in your state? Retrieved from

I'm Jeremiah Castelo, the owner of World Water Reserve. I'm a writer and researcher with a particular interest in sustainability and rural living, water scarcity, and innovative water purification methods. I utilize my multimedia and communication experience in the NGO and humanitarian fields to bring light to important topics. My passion is to educate others on the reality of the global water crisis and on ways to sustain themselves and their families in the midst of it.
Jeremiah Castelo


  1. Chris Meador

    Thanks for putting this together! Great work! Rain water harvesting appears to be legal in every state, I’m not sure why you say “just about every state?”

    1. Author
      Jeremiah Castelo

      Hi Chris. Yes, you’re correct. Some states such as Colorado still have restrictions in terms of how the rainwater is used and how much of it can be collected, and laws are always changing. But in terms of it being legal, you’re absolutely right – there are currently no states that completely restrict private rainwater collection. Thanks for coming by!

  2. Wynotme307

    Seems odd that most states felt compelled to pass legislation to protect Rain Water Harvesting in the period between 2008-2016. Seems it coincides with a presidential term of office. I do feel that stating RWH is legal n a state, then stating it is controlled by and permitted by and regulated by some department of the state government, is a bit confusing. Also, municipalities are usually the parties that restrict collection, not the state.

    Thank you for this valuable information. The links in blue are invaluable. I have looked for a collection such as this several times. You did a great job!


  3. John Gile

    Good article. I think the laws are there to protect a person’s right to collect rain water since water is being treated as a commodity and is being bought up by corporations in other countries. I have been collecting rain water for years and have even lived off of it for over a decade. It is good water and better than well water if you can collect enough. There are pollutions in the air but it’s not too hard to filter/settle them out. Low pressure/high volume systems work well with rain catchment.

  4. Nicolette DuBois

    Thanks Jeremiah for the update and list by state. I had always heard that only WV and HI allowed rain collection, so was surprised and delighted that most states are onboard! I am renting a cabin on a very rugged WV mountain – about 10 miles from a little town that almost decided to use rainwater collection on schools. The house I rent has a rainwater collection roof design which funnels rainwater into a 2500 gallon tank. Then the water goes through a house filter and I filter again in the kitchen. About 20 years ago a friend built a house with 6 2500 gallon rainwater tanks buried in the ground for his house, which also had the under floor water heating system. Most of my friends in this area have rainwater collection systems similar to the house I’m renting.

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