No, it is not illegal to collect rainwater in any of the 50 United States. Some states currently have restrictions on the amount of rainwater that can be collected and how it is collected; however, it is not entirely illegal to collect rainwater in any of the 50 states. That fact surprises a lot of people who have heard otherwise.
The Federal Government does not have any laws or restrictions regarding rainwater harvesting. Every rule that applies to your rain barrel comes from state, county, or city authorities. The confusion comes from a handful of Western states that do regulate how much you can store and what you can use it for.
States that have some level of rainwater collection restrictions include Arkansas, California, Colorado, Georgia, Illinois, Nevada, North Carolina, Ohio, Oregon, Rhode Island, Texas, Utah, Virginia, Washington, and Wisconsin. That said, “restrictions” doesn’t mean “banned.” Most of these states simply have guidelines for safe collection.
This guide covers every state’s rules, explains why restrictions exist, breaks down storage limits and permit requirements, and shows you where tax incentives can save you money. If you’ve ever Googled “is it illegal to collect rainwater,” this is the only page you’ll need.
Is It Illegal to Collect Rainwater
Collecting rainwater is legal in all 50 states. The practice of rainwater harvesting is currently legal in all 50 U.S. States. No federal law bans it, restricts it, or even regulates it. The rules come entirely from individual states and local governments.
The federal government does not regulate rainwater harvesting. This leaves the responsibility of managing rainwater collection to state and local governments, which results in a patchwork of laws across the country.
Think of it like speed limits. The feds don’t set a single number. Each state picks its own, and some cities go even further. Rainwater laws work the same way.
While rainwater harvesting is legal in most of the United States, a patchwork of federal, state, and local regulations creates different rules depending on where you live. Some states actively encourage it with rebates and incentives, others have specific restrictions on storage amounts or uses, and a few still maintain limits rooted in century-old water rights laws.
Here’s a quick snapshot of the legal status across the country:
| Legal Status | Number of States | Examples |
|---|---|---|
| Legal, no restrictions | 31+ states and D.C. | Florida, Michigan, Alabama |
| Legal, with some regulations | ~15 states | California, Texas, Illinois |
| Legal, with strict limits | 2 to 3 states | Colorado, Utah, Nevada |
| Fully illegal | 0 states | None |
At least 31 states, Washington, D.C., and two territories broadly allow unrestricted collection. The remaining 19 states maintain some restrictions on rainwater collection.
Why Is It Illegal to Collect Rainwater
It’s not actually illegal anywhere, but restrictions exist for two main reasons: water rights and public health concerns. The primary reason for restricting rainwater harvesting stems from water rights laws. In states like Colorado, where water is a precious commodity, these laws ensure that every drop of water is allocated to specific uses, including surface water that eventually flows into rivers, lakes, or reservoirs.
Other reasons for state restriction are based on laws known as prior appropriation, which were implemented as a first-come, first-serve basis for settlers in the Old West. Prior appropriation laws are generally applied toward groundwater and surface water situations, but some states still consider rainwater as part of the prior appropriation doctrine as well.
The second reason is simpler: safety. Because the typical catchment surface for rainwater is the rooftop of a home, bacteria from animal feces and other harmful contaminants are generally present in rainwater. This makes it very dangerous to consume without proper filtration.
According to a study by the Scientific World Journal, the amount of rainwater collected by individual homes would have little to no effect on the hydrological cycle, especially because homeowners would use this water for their yards or gardens so that it would return to the Earth. That finding has pushed many states to loosen their rules over the past decade.
- Water Rights (Prior Appropriation): Western states view every raindrop as part of the larger watershed allocated to existing rights holders
- Reasonable Use Doctrine: Eastern states allow collection as long as it doesn’t restrict others’ access
- Health Codes: Some states require covers, filtration, or plumbing code compliance to prevent contamination
- Stormwater Management: A growing number of cities see rainwater collection as a solution, not a problem
What States Is It Illegal to Collect Rainwater
No state makes rainwater collection fully illegal. While no state bans collecting rainwater, many impose heavy restrictions on its harvesting and usage. The states people most often confuse as “illegal” are Colorado, Utah, and Nevada, but all three now allow it with conditions.
Rainwater collection is legal in all US states, though Colorado, Utah, and Nevada have specific limitations on storage amounts or require registration for larger systems.
Here are the states with the most notable restrictions:
| State | Storage Limit | Permit Required? | Key Restriction |
|---|---|---|---|
| Colorado | 110 gallons | No | Outdoor use only, 2 barrels max |
| Utah | 2,500 gallons | Registration if over 100 gal | Must use on same property |
| Nevada | No set limit | No | Non-potable domestic use only |
| Kansas | No set limit | Yes, for commercial | Domestic use is permit-free |
| Arkansas | No set limit | No | Must follow plumbing code |
Kansas and North Dakota may require a permit to harvest rainwater. Even in those cases, the permit process exists to track usage, not to prevent you from collecting.
Key Takeaway: Rainwater collection is legal in every state. The states with the tightest rules (Colorado, Utah, Nevada) still allow it under specific conditions. No state outright bans it.
Where Is It Illegal to Collect Rainwater in the US
Nowhere. There is no state, county, or city where rainwater collection is completely banned by law. It is not entirely illegal to collect rainwater in any of the 50 states. The myth likely comes from Colorado’s pre-2016 restrictions, which were among the strictest in the country.
The limited access is actually a significant change from a century-long state prohibition against collecting rainwater. Colorado had functionally banned the practice for over 100 years before lawmakers changed the rules in 2016.
That said, local rules can still trip you up. HOAs do have the ability to regulate rainwater harvesting systems within their neighborhood and set restrictions, so it’s important to check local rules on your city’s website or contact your HOA.
Here’s where the confusion tends to come from:
- Colorado: Had a century-long ban, now allows 110 gallons
- Oregon: A man went to jail in 2012 for collecting 13 million gallons (not a typo)
- Utah: Required registration since 2010
- Nevada: Only opened the door to residential collection in 2017
For some, collecting rainwater has even landed them in the slammer. Back in 2012, one man in Oregon collected 13 million gallons of water and created three reservoirs on his property from rainwater harvesting. That’s right, he made three separate bodies of water from the water he collected. That case is often cited as proof that collection is “illegal,” but it involved building private reservoirs, not placing a barrel under a gutter.
Is It Illegal to Collect Rainwater in California
No. 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. You don’t need a permit for basic rooftop collection.
In 2018, the State of California passed SB-558, which excludes property taxes from the new construction of a rainwater harvesting system. So the state doesn’t just allow it; California actively rewards you for doing it.
The only time you might need special authorization is for large-scale systems. The only time you would need to seek a permit for the collection of rainwater in California is if your rainwater collection is being used to create a water supply such as a swimming pool, spa, or fountain.
- Rooftop rain barrel collection: No permit needed
- Non-potable use (garden, car wash): Fully legal
- Drinking water use: Legal with proper treatment
- Property tax exemption available under SB-558
Is It Illegal to Collect Rainwater in Texas
Texas is one of the most rainwater-friendly states in the country. On the flip side of the laws preventing the collection of rainwater in Colorado, Texas is a state that actively encourages the collection of rainwater. From stormwater retention to water availability, there are plenty of good reasons why the state of Texas actively encourages the collection and harvesting of rainwater.
Many counties across the state offer tax incentives to residents and businesses that install rainwater harvesting systems as well as there being a sales tax exemption on rainwater harvesting systems. The Texas Rain Catcher Award is another incentive scheme that recognises the contribution of individuals and entities pursuing rainwater harvesting as a water conservation strategy.
There are several provisions in House Bill 3391, most notably: the catchment system must be incorporated into the design of the building, a written notice must be given to the municipality or owner of the public water supply system, and rainwater used for indoor potable purposes must be properly treated as such.
| Texas Rainwater Rules | Details |
|---|---|
| Legal Status | Legal and encouraged |
| Permit Needed | No |
| Storage Limit | None |
| Sales Tax on Equipment | Exempt |
| Potable Use | Allowed with treatment |
| Key Law | House Bill 3391 |
Key Takeaway: Texas, California, and Florida all allow rainwater harvesting. Texas goes the furthest by offering sales tax exemptions and a statewide award program for collectors.
Is It Illegal to Collect Rainwater in Florida
Florida has zero state-level restrictions on rainwater collection. Florida state law doesn’t impose any restrictions on rainwater harvesting. You can collect as much as you want from your roof, store it however you like, and use it for any non-potable purpose.
This makes sense when you think about Florida’s climate. The state gets over 50 inches of rain per year on average. Water scarcity isn’t the issue it is out West.
States with heavy rainfall, like Oregon or Florida, tend to have fewer restrictions, while arid states (e.g., Arizona, New Mexico) often encourage rainwater collection to combat drought.
No permit is needed. No registration is required. There are no gallon limits.
- Storage: Unlimited at the state level
- Permit: Not required
- Use: Non-potable recommended; potable with treatment
- Local rules: Check your city and HOA for any additional guidelines
Florida is about as permissive as it gets for rainwater collection.
Is It Illegal to Collect Rainwater in Colorado
Collecting rainwater in Colorado is legal, but this state has the strictest rules in the nation. Most homeowners in Colorado are allowed to use rain barrels to collect rainwater. A maximum of two rain barrels with a combined storage of 110 gallons or less are allowed at each household.
The information provided in this factsheet is based primarily on language in Colorado House Bill 16-1005 and is intended to inform citizens on how to properly use rain barrels in accordance with Colorado law.
Here’s what you can and can’t do under HB 16-1005:
| Colorado Rain Barrel Rules | Details |
|---|---|
| Maximum Barrels | 2 |
| Maximum Combined Storage | 110 gallons |
| Collection Surface | Rooftop only |
| Allowed Uses | Outdoor (irrigation, car wash, hot tub) |
| Prohibited Uses | Drinking water, indoor household |
| Permit Needed | No |
| HOA Can Ban It? | No (Section 3 of HB 16-1005) |
Section 3 of Colorado HB 16-005 prevents an HOA from prohibiting a unit owner from using rain barrels for precipitation collection. Your HOA can regulate where you place them and how they look, but they can’t stop you entirely.
Certain residential properties that have a residential well, or that could qualify for a residential well, may be eligible to collect more than 110 gallons of precipitation. That expanded allowance comes from Senate Bill 09-080.
Why Is It Illegal to Collect Rainwater in Colorado
Colorado’s history with rainwater comes down to one legal concept: prior appropriation. The use of water in this state and other Western states is governed by what is known as the prior appropriation doctrine. This doctrine of water allocation controls who uses water, how much water may be used, the types of uses allowed, and when those waters can be used.
Under this system, every drop of precipitation belongs to someone with established water rights. The primary concern with rainwater harvesting in Colorado was that it could potentially affect downstream water users. If homeowners collected too much rainwater and prevented it from flowing into the local water system, it could limit the availability of water for those with legal water rights downstream.
Imagine buying a concert ticket that guarantees you a seat. If someone blocks the entrance, you can’t get in even though the seat is yours. That’s how prior appropriation works with water.
After performing research, the state concluded that rainwater harvesting was unlikely to impact the water rights of individuals downstream of an upstream collector. That finding led to the 2016 law change.
- Prior appropriation means “first in time, first in right”
- Colorado treated every raindrop as part of the watershed
- The 2016 law (HB 16-1005) opened the door for residential collection
- Research showed home rain barrels don’t meaningfully affect downstream users
- The trend is toward loosening restrictions further
Key Takeaway: Colorado restricted rainwater for over a century because of prior appropriation water rights. Research proved home collection doesn’t harm downstream users, leading to the 2016 law change.
Is It Illegal to Collect Rainwater in Ohio
Rainwater harvesting is legal for both non-potable and potable uses, as long as the water system is providing drinking water to fewer than 25 people (Ohio Rev. Code §3701.344).
Ohio is one of the more permissive states. You can collect rainwater and even use it as drinking water if your system serves a small number of people. Larger systems fall under Ohio Department of Health oversight.
It is legal to collect rainwater in Ohio, however, there are strict codes and regulations that must be followed. Those codes relate mostly to potable use, not basic garden irrigation.
| Ohio Rainwater Rules | Details |
|---|---|
| Legal Status | Legal |
| Non-Potable Use | Unrestricted |
| Potable Use | Yes, under 25 people |
| Key Statute | Ohio Rev. Code §3701.344 |
| Registration | Not required |
| Incentives | Varies by county |
For the average homeowner using a rain barrel to water tomatoes, Ohio has essentially no barriers. The regulations kick in only when you plan to use rainwater as an actual drinking water source.
Is It Illegal to Collect Rainwater in Oregon
Rainwater harvesting is legal in Oregon, however, you may only collect rainwater from your rooftop surface, not rainwater that falls to the ground or from a water source that runs through your property.
Oregon’s water laws are based on the doctrine of prior appropriation and requires most water surface water uses to obtain a permit. However, rainwater harvesting when collected on a rooftop does not require a permit.
Portland offers stormwater rewards for rain collection as well as the downspout disconnect program. So if you live in Portland, the city will actually pay you to collect rainwater.
Oregon gets its “illegal” reputation from that 2012 case. Back in 2012, one man in Oregon collected 13 million gallons of water and created three reservoirs on his property from rainwater harvesting. He wasn’t using rain barrels. He built private lakes. The average homeowner with a barrel under the gutter has nothing to worry about.
- Rooftop collection: Legal, no permit
- Ground-level collection: May need a water rights permit
- Portland incentives: Stormwater rewards available
- Potable use: Allowed with proper filtration
Is It Illegal to Collect Rainwater in Utah
As of 2010, all Utahns are allowed to legally collect up to 2,500 gallons of rainwater on their property in covered above ground containers or in underground cisterns.
Utah State law (Utah Code 73-3-1.5) allows rain catchment storage up to 2,500 gallons, with the following qualifiers: A person may collect and store precipitation without registering in no more than two covered storage containers if neither covered container has a maximum storage capacity of greater than 100 gallons.
Collection in more than two containers or greater than 100 gallons must be registered. Registration is free and takes only a few minutes online through the Utah Division of Water Rights.
| Utah Rainwater Rules | Details |
|---|---|
| Maximum Storage | 2,500 gallons |
| No Registration Needed | Up to 2 containers, under 100 gal each |
| Registration Required | Over 100 gal or more than 2 containers |
| Registration Fee | Free |
| Key Statute | Utah Code 73-3-1.5 |
| Must Use On | Same property where collected |
Many people still believe that rainwater harvesting is illegal, but this is a myth. On May 11, 2010, Senate Bill 322 went into effect which allowed for legal harvesting of rainwater in Utah. This law was partially amended in 2013 with House Bill 363 to help simplify the regulations.
Key Takeaway: Utah, Oregon, and Ohio all allow rainwater collection. Utah’s 2,500-gallon limit with free registration is far more generous than Colorado’s 110-gallon cap.
Is It Illegal to Collect Rainwater in New York
Rainwater harvesting is legal in New York with no state-level restrictions. The state has no laws specifically regulating or limiting how much rainwater residents can collect for personal use.
New York City, however, has its own building code requirements. If you plan to install a large cistern or connect a rainwater system to your building’s plumbing, you may need a permit from the NYC Department of Buildings.
For basic outdoor use like watering a rooftop garden or washing your car, a simple rain barrel in New York requires no permit and no registration.
- State-level restrictions: None
- NYC building permits: May apply for plumbing-connected systems
- Outdoor rain barrels: Legal without permit
- Potable use: Check local health codes
New York state doesn’t incentivize collection the way Texas or Arizona does, but it doesn’t put any obstacles in your path either.
Is It Illegal to Collect Rainwater in Some States
While collecting rainwater is not federally illegal, many states have restrictions in place, and water laws are primarily handled on the state level. The word “illegal” gets thrown around a lot, but the more accurate word is “regulated.”
Here’s the difference. “Illegal” means you cannot do it at all. “Regulated” means you can do it if you follow specific rules. Every state that restricts rainwater falls into the “regulated” category. None fall into “illegal.”
Some states require homeowners to get a permit before installing a rainwater harvesting system. This may include submitting system plans, paying fees, and ensuring compliance with safety standards.
States with the most notable regulations:
- Colorado: 110-gallon maximum, outdoor use only
- Utah: 2,500-gallon maximum, registration required over 100 gallons
- Nevada: Legal since 2017 for non-potable domestic use only
- Arkansas: Must follow plumbing code, designed by licensed engineer
- Kansas: Permit needed for commercial use
Other states maintaining rainwater collection laws include Arizona, Illinois, North Carolina, Ohio, Oklahoma, Rhode Island, Texas, Utah, Virginia and Washington. These laws don’t make it illegal to collect rainwater; they outline allowable uses for rainwater and establish tax credits for people who invest in rainwater collection systems.
States That Encourage Rainwater Collection with Incentives
Several states don’t just allow rainwater harvesting; they pay you to do it. Rhode Island, Texas, and Virginia encourage residents to collect rainwater by offering a tax credit or exemption for equipment purchased for rainwater harvesting.
Arizona offers tax incentives for homeowners and businesses that install rainwater harvesting systems. Some Arizona cities go even further. Arizona also made collecting rainwater legal in 2012, and some towns such as Tucson offer rebates of up to $2,000 for setting up rainwater harvesting systems.
| State | Incentive Type | Details |
|---|---|---|
| Texas | Sales tax exemption | Equipment purchases are tax-free |
| Arizona | Tax incentives + rebates | Up to $2,000 in Tucson |
| Virginia | Tax credit | SB 1416 created the Alternative Water Supply Fund |
| Rhode Island | Tax credit | HB 7070 covers cistern installation |
| California | Property tax exclusion | SB-558 excludes new systems from property tax |
| Maryland | Rebate program | Up to $4,000 in Prince George’s County |
Most rainwater rebates offer money back as a refund up to a set amount. Common rebate values are $0.50 to $1.00 for every gallon of the rainwater container. Maximum rebate values of $100, $250, $500, and $1,000 are common but sometimes range up to $5,000.
That’s money back in your pocket just for putting a barrel under your downspout. Check your county’s water conservation office for local rebate programs that stack on top of state incentives.
Key Takeaway: At least six states offer direct financial incentives for rainwater collection, including tax credits, sales tax exemptions, and rebates worth up to $5,000. Texas and Arizona lead the way.
Can You Go to Jail for Collecting Rainwater
The short answer is almost certainly not, but it has happened once. For some, collecting rainwater has even landed them in the slammer. Back in 2012, one man in Oregon collected 13 million gallons of water and created three reservoirs on his property from rainwater harvesting. That’s right, he made three separate bodies of water from the water he collected.
That case is the single famous example, and it’s wildly unrepresentative. The man didn’t have a rain barrel. He built three unauthorized reservoirs, each large enough to be classified as a body of water. He also violated existing water rights permits and was fined after years of warnings before serving 30 days in jail.
If you fail to follow the rules, you may face such consequences as fines or even jail time. That said, typical violations for homeowners would result in a notice to comply or a small fine, not handcuffs.
Here’s a realistic breakdown of consequences:
| Violation Type | Likely Consequence |
|---|---|
| Small rain barrel, no permit needed | No penalty (legal in all 50 states) |
| Exceeding storage limits (CO, UT) | Notice to comply or small fine |
| Connecting to public plumbing without permit | Building code violation, fine |
| Building unauthorized reservoirs | Court order, fines, possible jail |
If you’re collecting roof runoff into a barrel for your garden, you’re on the right side of the law in every single state. The Oregon case is the equivalent of comparing a parking ticket to a bank robbery. Both are “illegal,” but they’re not remotely the same.
Frequently Asked Questions
Do you need a permit to collect rainwater in the United States?
You can collect rainwater in all 50 states, with only Colorado, Utah, and Nevada having minor storage limits or registration requirements.
Most states require no permit for basic rain barrel setups.
Kansas and North Dakota may require a permit to harvest rainwater.
Check your local building department for city-level rules.
How many gallons of rainwater can you legally store?
It depends on your state.
A maximum of two rain barrels with a combined storage of 110 gallons or less are allowed at each household in Colorado.
All Utahns are allowed to legally collect up to 2,500 gallons of rainwater on their property.
Most other states set no specific gallon limit at all.
Can you drink rainwater you collect from your roof?
Because the typical catchment surface for rainwater is the rooftop of a home, bacteria from animal feces and other harmful contaminants are generally present in rainwater. This makes it very dangerous to consume without proper filtration.
Some states like Ohio and Texas allow potable use with proper treatment.
Most health agencies recommend using collected rainwater for outdoor purposes only.
What happens if you collect rainwater illegally?
In most cases, the worst outcome is a notice to comply or a small fine.
If you fail to follow the rules, you may face such consequences as fines or even jail time.
Jail time has only occurred once, involving 13 million gallons and unauthorized reservoirs.
Basic rain barrel users face essentially zero enforcement risk.
Does collecting rainwater affect your neighbors’ water rights?
According to a study by the Scientific World Journal, the amount of rainwater collected by individual homes would have little to no effect on the hydrological cycle.
In Western states, the concern was that collection diverts water from downstream rights holders.
Research proved that home-scale collection doesn’t meaningfully impact anyone else’s supply.
This is the most complete, state-specific guide to rainwater collection legality available in 2026. Whether you’re in Texas with a tax-free rain barrel or in Colorado with a 110-gallon cap, the law is on your side.
Bookmark this page and share it with anyone who still thinks putting a barrel under their gutter is a crime. The rules are simpler than you think, and they’re getting more permissive every year.
