If you’ve noticed a strong sewage smell in your yard, it’s not just unpleasant—it could be a sign that your septic system needs attention. A properly functioning septic system should keep odors contained underground, but several common issues can cause foul smells to escape. At Sequoia Pumping, we’ve been serving homeowners and businesses across the Central Valley, including Fresno, Clovis, Madera, and beyond, for generations, and we know exactly what to look for when septic odors become a problem.
In this post, we’ll break down the most likely causes of septic odors and how to fix them before they turn into bigger (and costlier) issues.
Common Causes of Septic Tank Odors in Your Yard
1. Your Septic Tank Needs Pumping
Septic tanks naturally collect waste over time, and if they aren’t pumped regularly, solid waste builds up, leading to strong odors escaping into your yard. In the Central Valley’s hot climate, heat can make the smell even worse.
Fix:
- We recommend pumping your tank every 3–5 years, depending on household size and usage.
- If you haven’t had your tank pumped in a while, Sequoia Pumping can handle it quickly and affordably in just one visit.
2. Clogged or Blocked Vent Pipes
Your septic system has vent pipes designed to safely release gases. If they get clogged with dirt, leaves, or even pests, gases can’t escape properly and may seep out into your yard instead.
Fix:
- Check for blockages in your vent pipes and clear them if possible.
- If you notice a persistent smell near your roof vent, it may need adjustment
3. Drain Field Issues
Your drain field is responsible for filtering wastewater back into the soil. If it’s clogged or failing, you might notice soggy patches in your yard, standing water, or foul smells.
Fix:
- Avoid parking vehicles or heavy equipment on your drain field.
- If your drain field is struggling, call Sequoia Pumping—we can diagnose and recommend solutions.
4. Cracked or Damaged Septic Tank
A cracked or leaking septic tank can release raw sewage odors into the surrounding area. Over time, shifting soil or tree roots can cause damage.
Fix:
- If you suspect a cracked tank, don’t wait! We can inspect it and recommend repairs or replacements if needed.
5. Loose or Broken Septic Tank Lid
A loose, broken, or improperly sealed septic tank lid allows gases to escape.
Fix:
- Inspect the lid for cracks or misalignment.
- If your lid is damaged or missing, we can replace it with a proper seal.
6. Overuse of Harsh Chemicals
Many household cleaning products contain bleach, antibacterial agents, or harsh chemicals that kill the beneficial bacteria in your septic tank. Without these bacteria, waste doesn’t break down properly, leading to strong odors.
Fix:
- Use septic-safe cleaning products that won’t harm your system.
- Consider adding a biological treatment (like enzymes) to help restore the bacterial balance—we can recommend safe options.
How to Prevent Septic Odors in the Future
Septic odors are often a warning sign of bigger problems, so prevention is key. Here’s how you can keep your system running smoothly:
✔ Stick to a Regular Pumping Schedule – Our team at Sequoia Pumping is here to keep your tank maintained year-round.
✔ Be Mindful of What You Flush – Avoid grease, wipes, and non-biodegradable products.
✔ Conserve Water – Excess water can overload your system and cause drain field issues.
✔ Keep the Drain Field Clear – No trees, heavy vehicles, or structures over the area.
Call Sequoia Pumping for Expert Septic Services in the Central Valley
If your septic tank smells are getting worse—or you just want to prevent problems before they start—Sequoia Pumping is here to help. We serve Fresno, Clovis, Madera, Merced, Tulare, and surrounding areas, providing expert septic pumping, inspections, and maintenance.
📞 Call us today at (559) 233-2400 or book an appointment online to schedule your service!
