A tree growing into a power line is one of the few tree problems where the safest move for a homeowner is to do nothing to the tree at all. Electricity can arc through branches, damp wood, ladders, and pole saws, and people are seriously hurt every year trying to clear a line themselves.
Here's how responsibility works for trees near power lines in San Antonio, what CPS Energy handles, and what you can safely do yourself.
Key Takeaways
- Never trim near power lines yourself — OSHA keeps unqualified workers at least 10 feet from overhead lines.
- CPS Energy maintains vegetation around its distribution lines; call 210-353-2222 for non-emergency concerns.
- If a tree is on a line or a line is down, stay well back and call 911 or CPS Energy immediately.
- Ask CPS Energy how it handles the service line to your house before you schedule a tree crew.
The Rule: Don't Trim Near Lines Yourself
CPS Energy's guidance is clear: don't trim trees near power lines yourself. Federal OSHA rules require unqualified workers to stay at least 10 feet from overhead lines, with greater distances for higher voltages, and Texas law separately restricts work near high-voltage lines. Only line-clearance-qualified workers should prune near energized lines.
That 10-foot distance applies to you, your ladder, your pole saw, and any branch you're holding. A branch doesn't have to touch a line to become dangerous.
Who Is Responsible for Which Lines
Responsibility depends on which line it is:
- Distribution lines on poles: The main lines along streets and alleys are maintained by CPS Energy, which trims vegetation to keep them clear.
- The service line to your house: Handled differently — ask CPS Energy what it will trim or de-energize so a tree crew can work safely.
- Trees on your property: The tree is still yours; routine pruning and removal away from the lines are your responsibility.
- Utility easements: Trees in easements may be trimmed by the utility's contractors on their maintenance cycle.
If a Tree Is on a Line or a Line Is Down
If a tree or branch is touching a line or sparking, or a line is down, stay well back — utilities commonly advise at least 35 feet — keep kids and pets away, and call 911 or CPS Energy's emergency line right away. Assume every downed line is energized, even if your power is out.
For non-emergencies, like branches growing toward a line, contact CPS Energy at 210-353-2222 to request an evaluation. Non-emergency trimming can take time to schedule, so call early.
Planting and Pruning Away From Lines
Many line conflicts start at planting. A tree that matures at 50 feet tall shouldn't go under a power line. Near overhead lines, choose small-maturing species and plant large shade trees well away from the line.
For trees already growing nearby, regular pruning away from the line — done by a qualified crew — keeps them from becoming a problem. Directional pruning that guides growth away from the line is healthier for the tree than repeated topping.
How a Tree Service Works Near Lines
When we're called to a tree near a line, the first step is coordinating with CPS Energy. Depending on the line, the utility may handle the line-side pruning, de-energize or cover the line, or confirm safe clearance before our crew starts on the rest of the tree. We don't send a climber into a tree that's in contact with an energized line.
After a storm, when trees and lines are tangled together, coordination comes before speed. It can take longer, but it's the only safe way to do the work.
Damage to Your Service Mast
If a tree damages a line or the service mast on your house, contact CPS Energy first, then your insurer. Damage to the utility's equipment is typically handled by the utility, while the weatherhead and mast on your house are usually the homeowner's responsibility, and repairs to them may require a licensed electrician before service is restored.
Related Services & Areas
Frequently Asked
What should I do if a tree touches a power line?
Who trims trees near power lines in San Antonio?
How far should trees be from power lines?
Can I trim a tree touching the power line to my house?
The Bottom Line
Trees and power lines are a job for the utility and qualified crews, not a weekend project. Call CPS Energy early about anything near a line, call 911 for anything touching or down, and let a professional crew handle the rest of the tree once the line is safe.
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