The law regulates water through several easements. The natural drainage easement provides that lower lands must receive the waters that naturally and without human intervention descend from higher lands, along with the stones and earth they carry; the owner of the lower land cannot construct works to obstruct this, and the owner of the higher land cannot make works to aggravate it. There is a legal easement on the banks of rivers and streams: throughout the entire length of the banks of navigable or floatable rivers, the law reserves a zone (a salvage or easement zone) for public use such as navigation, floatage, fishing, and salvage; this is a public easement and cannot be fenced off or built upon. The easement of aqueduct allows a person who wishes to use water to which they have a right to make it pass through the intervening estates, upon payment of indemnity, subject to conditions. These water easements balance private property with the natural flow of water and the public interest.
Water does not respect property lines — it flows where gravity takes it. The law regulates this through water easements that bind landowners.
The Natural Drainage Easement
Lower lands must receive the waters that naturally and without human intervention descend from higher lands, along with the stones and earth they carry. Two limits keep it fair:
- The owner of the lower land cannot construct works that obstruct this natural descent; and
- The owner of the higher land cannot make works that aggravate the burden on the lower land.
It is about the natural flow — artificial diversions are a different matter.
The Easement on Riverbanks (the Salvage Zone)
Along the banks of rivers and streams, the law reserves a zone for public use. Throughout the length of the banks of navigable or floatable rivers, a strip (the salvage or easement zone) is subject to a public easement for:
- Navigation and floatage;
- Fishing; and
- Salvage.
Because it is a public easement, this zone generally cannot be fenced off, titled as private, or built upon — a frequent issue for waterfront properties and informal structures along rivers.
The Easement of Aqueduct
The easement of aqueduct allows a person who has a right to use water to make it pass through the intervening estates of others to reach their land, upon:
- Payment of proper indemnity to the affected owners; and
- Compliance with the conditions the law sets (proving the right to the water, the route being the least burdensome, etc.).
This enables irrigation and water supply where a person's source is separated from their land by others' property.
Balancing Private Property and Water
These easements balance private ownership with the natural flow of water and the public interest. A landowner's rights are limited where water and the public are concerned — you cannot dam up a neighbor's natural drainage, nor privatize a riverbank reserved for public use.
Practical Takeaways
- Lower lands must receive the water naturally descending from higher lands — neither owner may obstruct or aggravate it;
- A public easement (salvage zone) runs along riverbanks for navigation, fishing, and salvage — it cannot be fenced or built upon;
- The easement of aqueduct lets a water-rights holder carry water across intervening estates, upon indemnity and conditions.
Frequently Asked Questions
Does my lower lot have to accept water flowing from a higher lot? Yes. Under the natural drainage easement, lower lands must receive the waters that naturally and without human intervention descend from higher lands. The lower owner cannot obstruct it, and the higher owner cannot aggravate it.
Can I fence or build on a riverbank on my property? Generally no. The law reserves a zone along the banks of navigable or floatable rivers as a public easement for navigation, floatage, fishing, and salvage. This salvage zone cannot be fenced off, privatized, or built upon.
What is the easement of aqueduct? It allows a person with a right to use water to make it pass through the intervening estates of others to reach their land, upon payment of proper indemnity and compliance with the conditions the law sets.
What is the purpose of water easements? To balance private ownership with the natural flow of water and the public interest. Landowners cannot dam up a neighbor's natural drainage or privatize a riverbank reserved for public use.
This commentary is for general informational purposes only and does not constitute legal advice. For guidance specific to your situation, please consult a licensed attorney.
If you have questions about your rights or options under Philippine law, our firm is available to assist. You may reach us via Viber or WhatsApp, call us at 0995 433 5550, or send an email to vivasnobles@gmail.com. We look forward to hearing from you.