Septic tanks may seem like an icky subject, but they’re important to the health of a home and its residents. Septic tanks work silently in the background, doing the job of processing wastewater before returning it to the earth. However, when a septic tank system is failing or about to fail, it will announce itself in several unpleasant ways. Stay on top of the following four warning signs that a septic tank is in trouble; otherwise, the sights and smells of a broken septic system will manifest and scare off buyers!

Slow Drains

Are the bath, sink, and other drains in the house taking their sweet time? It might be a clog, or it might be the septic tank letting you know it can’t take any more waste. If drain cleaners, snakes, and plungers don’t do the job, hire a plumber to take a look. They may discover a septic tank issue and advise you to schedule an inspection and pumping by another professional. As a rule of thumb, one slow drain is no big deal, but if they’re all draining slowly, it could be a septic tank issue.

Bad Smells

This is one of the most common signs a septic tank is in trouble. Stomach-turning stenches from the yard may indicate a full septic tank or one in need of repair. Bacteria in the septic tank may have fallen behind on processing solid waste or may have been killed by household chemicals that shouldn’t have gone down the drain. There’s no way to cover up the odor, so contact a septic tank professional to see what’s up down below.

Lush Grass Growth

Who doesn’t love a lush, green lawn? That’s all well and good if it’s a consistent thick green covering the whole yard. However, if there are patches of extra-healthy grass and other vegetation over the septic tank, there’s likely a leak. The grass may love the nutrients in the leaking waste material, but you shouldn’t since it’s a sign the septic tank is damaged and in dire need of repair.

Standing Water

The only pool in the yard should be one built for swimming and diving. Pools of standing water in the middle of the yard are big warning signs of an overloaded tank, a failing drain field, or other septic problems. These aren’t the pleasant puddles of water left after a rainstorm, either. They could be teaming with bacteria and other unpleasantness!

Those are just four warning signs that a septic tank is in trouble. Before putting the home on the market, ensure the septic tank is reviewed, pumped out, and otherwise maintained. Knowing when to get your septic tank inspected and creating a schedule can be a valuable selling point for buyers.

 

Keep Reading

More South Florida Real Estate Guides

Fort Lauderdale Home Buying Guide 2026

Step-by-step guide to buying a home in Fort Lauderdale — neighborhoods, financing, and closing costs.

First-Time Homebuyer Checklist 2026

Everything first-time buyers need to know before making an offer in South Florida.

Best Neighborhoods in South Florida 2026

Compare the top South Florida communities by lifestyle, schools, walkability, and home prices.

Fort Lauderdale Real Estate Market 2026

Current market trends, price data, and outlook for buyers and sellers in Fort Lauderdale.

Florida Real Estate Investment Guide 2026

How to evaluate, buy, and profit from investment properties in South Florida.

Real Estate Agent Commissions Explained (2026 NAR Rules)

What buyers and sellers pay under the new NAR settlement rules in Florida.

Living in Weston FL — Homes, Schools & Lifestyle Guide 2026

A deep dive into Weston's master-planned communities, A-rated schools, and home values.

Victoria Park Fort Lauderdale Guide

Explore homes, walkability, and the charming character of Victoria Park in Fort Lauderdale.

3 Biggest Real Estate Investor Mistakes in Florida

Costly errors Florida investors make — and how to avoid them when buying rental property.

Scott Lehr, PA — Licensed South Florida Real Estate Agent

Scott Lehr, PA

Licensed Florida Real Estate Agent · 20+ Years Experience

Scott Lehr is a top-producing South Florida Realtor® specializing in Fort Lauderdale, Weston, Boca Raton, and Broward County. He has helped hundreds of buyers and sellers navigate the South Florida market, from first-time home purchases to luxury waterfront estates.

View Scott's full bio →  ·  Call (954) 342-6180

Browse South Florida Homes for Sale

Neighborhood & Community Guides

Buyer Guides by City

Seller Guides by City

View all South Florida MLS listings  ·  Map Search  ·  📊 South Florida Market Report