Collecting rainwater is not illegal in Pennsylvania. The state has no statute restricting residential rainwater harvesting, no permit requirement, and no cap on storage volume. The Department of Environmental Protection actively encourages the practice, telling homeowners they “can capture rainwater off your roof with a rain barrel, and then use the water in your garden or let it infiltrate slowly into the ground.”1Pennsylvania Department of Environmental Protection. Be Stormwater Smart The rules that can trip you up are local: municipal ordinances, HOA covenants, and drainage law between you and your neighbor.
Local Ordinances That May Apply
Pennsylvania’s Stormwater Management Act (Act 167) requires every county to develop a watershed-based stormwater plan, and municipalities adopt local ordinances consistent with those plans.2Pennsylvania Department of Environmental Protection. Act 167 FAQ That framework sometimes reaches down to residential rain barrels and cisterns.
Reading has one of the more detailed sets of rules. A rain barrel there cannot exceed 75 gallons or six feet in height, must sit on flat, stable ground (not on a porch or deck) at least one foot above ground level, must have a mosquito-proof screen, and must direct overflow away from the house and neighboring properties. Underground cisterns or containment vessels installed below grade require a building permit, a drainage plan, and city engineer approval.3American Legal Publishing. Reading, PA Code of Ordinances – 438-13 Underground Cisterns and Rain Barrels
Mosquito prevention shows up elsewhere. Sharon prohibits maintaining any rain barrel “in such a condition that mosquitoes may breed therein.”4American Legal Publishing. Codified Ordinances of the City of Sharon, PA – 664.17 Mosquitoes; Water Receptacles York requires underground residential infiltration facilities to sit at least ten feet from the property line.5York City. York City Ordinance Article 937 – Stormwater Management Standards None of these rules ban collection. They regulate placement, nuisance, and setbacks. Before you build anything more elaborate than a barrel under a downspout, call your municipal office and ask what applies.
What You Can Use the Water For
Gardening, lawn irrigation, car washing, and cleaning tools are unrestricted uses. No permit, no treatment, no paperwork. Penn State Extension recommends using collected rainwater on inedible plants such as flowers, shrubs, and lawn grass, because roof runoff can pick up leaf litter, bird droppings, and chemicals from roofing materials.6Penn State Extension. Rain Barrels: Information and Guide
Drinking is a different situation. Penn State Extension states plainly that collected rainwater “is not for consumption.”6Penn State Extension. Rain Barrels: Information and Guide The DEP regulates public water systems and requires permits for them,7Pennsylvania Department of Environmental Protection. Public Water Systems Permits but has no permitting program for private rainwater systems used as a household supply. It does not regulate private wells either.8Pennsylvania Department of Environmental Protection. Private Wells If you plan to drink it, filtration, disinfection, and testing are entirely on you, without regulatory oversight. The EPA has noted that no uniform national treatment standard exists for harvested rainwater.9Environmental Protection Agency. Managing Wet Weather with Green Infrastructure: Municipal Handbook – Rainwater Harvesting Policies
Runoff Onto a Neighbor’s Property
This is where legal collection turns into a legal problem. Pennsylvania courts have consistently held that an upper landowner is not liable for water that naturally flows downhill. Liability attaches when you divert water from its natural path by artificial means, or when you unreasonably increase the volume or change the quality of water draining onto a neighbor’s land.
A rain barrel with a properly directed overflow hose is unlikely to cause problems. A large system that concentrates roof runoff and dumps overflow toward a neighboring foundation is another matter. Route overflow away from property lines, ideally into a rain garden or a pervious area on your own lot. Reading’s ordinance requires overflow to be directed away from both the house and neighboring properties, and it’s sensible practice even where local law doesn’t demand it.
HOA Rules Are a Separate Layer
If you live in a planned community, your HOA’s covenants are a private contract that operates independently of state and local law. An HOA can prohibit visible rain barrels, require screening from street view, or ban outdoor storage containers under a general aesthetics clause. Some states have passed laws preventing HOAs from blocking rainwater collection. Pennsylvania has not.
Read your governing documents before you buy a barrel. Look for restrictions on outdoor structures, storage containers, and modifications to exterior appearance. Written approval from the board before installation is the safest route, particularly if the documents don’t mention rain barrels specifically.
Stormwater Fee Credits
Many Pennsylvania municipalities charge property owners a stormwater fee to fund drainage infrastructure and comply with federal clean water requirements. Installing a rain barrel can earn a credit that reduces the fee, though the specifics vary. Derry Township in Dauphin County offers credits for rain barrels and downspout disconnection. Mt. Lebanon in Allegheny County provides a one-time rain barrel credit. The Wyoming Valley Sanitary Authority in Luzerne County lists rain barrels among 16 eligible best management practices that qualify for fee reductions.10Penn State Extension. What Is a Stormwater Credit? Philadelphia’s Water Department goes further and provides free workshops and free rain barrels to residents.1Pennsylvania Department of Environmental Protection. Be Stormwater Smart Ask your municipality’s stormwater authority whether your setup qualifies.
Setting Up a Basic Rain Barrel
A standard residential rain barrel holds 50 to 80 gallons and sits under a downspout. Penn State Extension identifies the essential components: an inlet at the top connected to the downspout; a sealed lid and screen to keep out debris, insects, and children; an overflow outlet directed away from the building; a spigot near the bottom for a garden hose; and a raised platform to increase pressure at the spigot.6Penn State Extension. Rain Barrels: Information and Guide
Disconnect and drain the barrel before winter. Freeze-thaw cycles crack plastic containers, and water left standing over the cold months turns into a maintenance problem in spring.