Water Pooling in Low Spots of the Lawn

After a heavy rain, do you often find water pooling in one section of your lawn and the rest dries out normally? Water pooling after rain can create muddy lawns, kill your plants or grass, breed mosquitoes, and even damage your home’s foundation.

So you might be thinking, is this water pooling a serious drainage problem? Well, not always. After heavy rain, it is natural for some of the excess water to stay on the ground for a while because the soil needs time to soak it up. However, if you notice the water in that low spot dries out like the rest of your lawn, it might not be a drainage problem.

But if the low spot still holds water even after the rest of the lawn dries out, it is best to identify the issue behind it. First, analyze why water collects in that area.

Here are some common reasons water pools in low spots on your lawn and how to fix them.

The Low Spot Has No Drainage Outlet

Sometimes after rain, a low spot on your lawn floods because the water has nowhere to go. It has no drainage outlet for the rainwater to drain properly. Or maybe you already have a drainage path, but it’s blocked or damaged, so the water gets trapped instead of flowing away. As a result, a specific area of your lawn is staying wet.

Look for these signs.

• The affected low spot becomes muddy and wet after rain.
• The grass in that area starts to thin out or die.
• Moss and algae are starting to grow in that area.
• You might see the drain or catch basin being covered with dirt and leaves.
• The problem gets even worse after too much rain.

Solution

If the low spot in your lawn is small and shallow, you can try a simple DIY fix. Fill the low spot with topsoil and level it. You can also mix in some compost to improve the soil if you want to grow grass there later. If you already have a drain, check first whether it’s blocked with dirt. If so, open the drain cover and clean it so water can pass through properly.

However, if none of these methods work, it is best to call a professional to inspect it; they may recommend adding a drainage system like a French drain, Catch basin, or underground drainage outlet to collect the water and carry it to a suitable place.

New Construction May Have Created a Low Spot

If you had new construction, like a new patio, driveway, walkway, or something similar, rainwater may now flow in a different direction. For example, before the patio was built, rainwater flowed away from the lawn. But after the patio was built, the water might slope toward the lawn. As a result, if that water flows toward an existing low spot, it can collect there after heavy rain and make the pooling problem worse. Over time, repeated pooling can create muddy areas, damage your grass and plants, attract mosquitoes, and, if water collects near your home, potentially cause problems around your foundation.

Look for these signs.

• The ground feels soft or spongy in the low spot.
• Water still looks trapped along the edge of a patio or walkway.
• Water collects along the edge of your patio, driveway, or walkway.
• The low area looks muddy and wet even after the rest of your lawn dries out.

Solution

If water is collecting where you recently installed a patio, driveway, or walkway, first identify where the rainwater is coming from and where it is flowing. If a newly installed surface directs water toward a low spot in the lawn, correct the slope so the water flows away from that area.

However, correcting the slope not always solves the problem when the area receives a lot of runoff. Installing a channel drain or catch basin works well here, as it can collect water before it reaches the low spot and direct it toward a suitable drainage area.

In some cases, pavers might sink and cause a low spot. So, you may need to lift and level the pavers so water can flow away properly.

Runoff From Higher Areas

If your lawn is slightly higher near the back of your yard, rainwater will naturally run downhill toward a lower area. If that lower area has a low spot, water can collect there, especially during heavy rain. As a result, that specific area can become saturated and will take longer to dry out completely than the rest of your lawn.

Look for these signs.

• You will notice water moving across the lawn during rainfall.
• Water is entering your yard from a higher section of the property.
• Leaves or grass wash away with the water.
• You will notice some small lines or shallow paths in the lawn where water flows.

Solution

When rainwater flows from a higher section of your property into the low spot, you will need to redirect it to a suitable drainage area. For a small amount of runoff, you can create a shallow ditch yourself and direct the excess water from that low spot to a safe, appropriate outlet.

However, if heavy rainfall and a large amount of water flow from your driveway, patio, or another property, a swale won’t be able to handle it. In those cases, it is best to install a catch basin or French drain to collect the runoff and carry it to a suitable drainage area.

Soil Erosion

When it rains heavily, repeated runoff can slowly wash soil away from your lawn, especially in areas where water keeps flowing over the same part of the yard. Over time, that surface gradually becomes lower than the surrounding areas of your lawn. As a result, it creates a low spot where excess water pools, collects even more rainwater, and stays longer during the next storm.

Look for these signs.

• The roots of grass or plants become visible in the affected area.
• You will notice some small rocks or gravel become exposed on the surface.
• Grass will start disappearing along the edges of the area.
• You notice soil collecting at the bottom of a slope.

Solution

The aim is to protect the exposed soil from being washed away by rainwater. You can cover the affected area with mulch, or plant grass so the roots hold the soil in place. Another solution is to add soil to reshape the eroded area and cover the low spot.

However, if a storm brings heavy rainfall, covering it with soil won’t do much to solve the problem when excess water flows through that area. So you need to redirect that runoff, such as to a shallow swale, so it doesn’t keep washing away the soil. A catch basin or French drain installation can be more suitable for larger amounts of runoff.

A Quick Diagnostic: How to Find Out Why Water Is Pooling in Your Low Spot?

Before trying to fix the low spot, it is best to look closely at what is actually happening to the water during and after a heavy rain. Take a few minutes to observe. These simple checks can help you understand why excess water is collecting in that area.

• Watch closely where the water is coming from, which direction it flows, and where it stops.
• Take a close look at your lawn from different angles, and look for low points.
• Look for pavers that have sunk or surfaces that may be directing water toward the low spot.
• Soil erosion can also be a sign, so check for exposed roots, bare soil, or shallow paths where rainwater has washed away the soil.
• See how long the water is staying in that low spot. Is it drying out like the rest of your lawn or staying wet for a long time?
• If the low spot stays wet while the rest of your lawn is dry, check for an irrigation issue or an underground water-line leak.

When should you call a Professional Drainage Expert?

You can do a simple DIY fix by adding soil to the low spot and leveling it. But if the low spot is too deep or too large, or water still pools after you try to fix it, you may need to call a professional drainage expert.

Professional help is necessary when the low spot is especially close to your house, patio, or any other part of your yard, as excess water can damage your home’s foundation. So installing a French drain, underground pipe, or catch basin is often necessary to prevent further damage. MurfreesboroDrainServices can inspect the area, help identify where the water is coming from, and determine whether you need grading or a drainage system.

Frequently Asked Questions (FAQS)

How long should water stay in a low spot after rain?

Water in a low spot should usually drain away within 24 to 48 hours after rain. If the water is still there after two days, or the same low spot stays continuously soggy and wet after rain, it could be a sign of a drainage problem.

Can I fix a low spot in my lawn myself?

Yes, you can usually fix a small or shallow low spot yourself by adding screened topsoil and leveling the area. For deeper or larger low spots, you may need to remove the grass, add topsoil, and replace the sod. If the low spot keeps collecting water after you fix it, you will need a grading or a drainage solution such as a French drain or catch basin.

Will filling a low spot stop water from pooling?

Filling a small low spot with screened topsoil can stop water from pooling when the depression itself is the main problem. However, if too much water keeps flowing into the area from a higher part of your yard, driveway, or patio, adding soil alone won’t solve the problem. You need to redirect the water with grading or a drainage solution.

What should I do if water keeps pooling after I fill the low spot?

If water keeps pooling even after you fill up the low spot, the problem may be more serious than just the depression. Check where the water is coming from and where it is flowing. You may need to correct the grading or use a drainage solution, such as a shallow ditch, catch basin, or French drain, to move water away from the area.