How to Remove Outdoor Dog and Cat Urine Smell from Yards

Author: Ian C. Langtree - View Credentials
Published: 26 May 2014 - Updated: 8 Nov 2026
Publication Type: Informative

Table of Contents:
Synopsis - Definition - Overview - FAQs - Insights, Updates - Related Content

Synopsis

This information sets out practical ways to get rid of the stubborn smell of dog and cat urine and stool outdoors, where sun and repeated use by pets can make odors much worse. It explains why lawns develop brown patches and concrete takes on yellow stains, then gives household remedies such as garden lime, lemon dish soap with vinegar, daily watering, baking soda and diluted bleach for hard surfaces, along with the difference between odor neutralizers and masking agents. The tips are useful for pet owners, and especially for seniors and people with disabilities who rely on a service dog or companion animal and may find heavy scrubbing difficult, since several methods need little more than a garden hose.

At a Glance

• 1 - Dogs tend to use the same spot again and again.
• 2 - A masking agent only covers an odor with a stronger smell, so the problem returns when it wears off.
• 3 - Watering the area daily with an oscillating sprinkler dilutes urine and helps it soak into the soil.
• 4 - Baking soda should sit for at least an hour to absorb the smell, and concrete should be scrubbed first.

Topic Definition

Pet Urine Odor

Pet urine odor is the strong, ammonia-like smell left when dog or cat urine breaks down. As bacteria decompose urea, they release ammonia, and the uric acid crystals that remain bind to surfaces such as concrete, wood and soil, releasing smell again whenever they become damp or warm. Removing it requires breaking down or washing away these residues rather than simply covering the smell.

Overview

Exposed to the sun and elements, dog or cat urine smells can grow intolerable. In addition, dogs are inclined to use the same spot repeatedly. Areas with grass that have been affected by animal urine may be brown in color instead of green because of the high nitrogen content of the animals' urine. Cement areas may have a yellowish colored stain. A few common household ingredients however should help eradicate the urine smell.

Outdoor Urine and Stool Odor Removal Tips

• For grass and lawn areas try sprinkling garden lime on the urine patches.
• Cheap lemon dish soap with a bit of vinegar added works wonders. Use a garden hose end mixer and rinse down the area afterwards.
• Use an oscillating sprinkler daily in the area of the yard that the animals mostly use. The water will slowly dilute the urine and allow it to seep into the soil.
• Sprinkle baking soda on the area. Let it sit for at least an hour so it absorbs the urine smell. For cement areas, use a scrubbing brush to scrub the area before you let it sit.
• If the surface is porous, such as cement, and the urine has been left to dry, mix a little bleach with water (never with ammonia, vinegar or other cleaners) and pour it over the surface. Allow the mixture to sit for 10 minutes before rinsing the area with fresh water.
• Use an oxidizing bleach such as Clorox, or mix a chlorine solution for your pool and pour it on. The chlorine will neutralize the urine. This is not advised if you have vegetation in the area. If the chlorine solution comes in contact with the urine and stays wet (active) long enough it will kill the odor.

Commercial Products for Removing Urine Smell

There is a major difference between odor neutralizers and masking agents. A masking agent is not effective for removing odor. It merely covers it up with another, stronger odor. When the masking agent wears off, the malodors become noticeable again.

• Odor Destroyer - Designed to tackle difficult to solve outdoor odor problems, Odor Destroyer - Dry is the superior alternative to lime for outdoor urine odors in your yard, kennel, or dog run. The product is composed of all natural components, completely biodegradable, non-hazardous, and non-toxic.
• Five Star Odor Buster-Outdoor - An all-natural broad spectrum odor neutralizing agent produced from natural plant extracts which eliminates the need for multiple products. Five Star Odor Buster-Outdoor is safe, bio-based, all-natural and biodegradable, and contains no harmful chemicals.
• Yard Odor Killer Stool and Urine Deodorizer - The bottle connects to a regular garden hose and is safe for use around children and pets. Safely and effectively eliminates stool and urine odors. You can spray it on any outdoor surface to eliminate odors.
• Sweet PDZ - An odor control and deodorizer of choice for thousands of horse, pet and livestock owners. Sweet PDZ is an all-natural, non-hazardous and non-toxic mineral. It captures, neutralizes and eliminates harmful levels of ammonia and odors.
• SCOE 10X - A technologically advanced ultra premium super concentrated odor eliminator.

More on this topic: Household Tips Publications - Assistive Home Products Publications

Frequently Asked Questions

Why does dog urine kill grass?

Dog urine contains a high concentration of nitrogen from urea. In large amounts it burns grass roots, leaving brown patches often ringed with greener grass where the nitrogen was diluted.

Are enzyme cleaners safe to use outdoors?

Yes. Enzyme cleaners made for pet odors are generally safe on lawns, patios and dog runs, and they work by breaking down the organic compounds that cause the smell.

Is garden lime safe for pets?

Garden lime made from ground limestone is generally safe once watered in, but hydrated or quick lime is caustic and can burn paws and skin. Keep pets off treated areas until they are dry.

Can I mix bleach and vinegar to clean urine?

No. Mixing bleach with vinegar or ammonia-based cleaners releases toxic gases. Use them separately and rinse well between products.

Why does the smell come back when it rains?

Dried uric acid crystals do not dissolve easily, and moisture reactivates them. Until they are broken down by enzymes or washed away, odors can return in wet or humid weather.

How can I stop my dog from using the same spot?

Clean the area thoroughly to remove the scent marker, then guide the dog to a chosen spot with gravel or mulch and reward them for using it.

Do cat repellents help with outdoor cat urine?

Motion-activated sprinklers, citrus peel and commercial scent repellents can discourage cats, but the area must also be cleaned so the old scent does not attract them back.

Can pet urine smell affect health?

Strong ammonia from built-up urine can irritate the eyes, nose and lungs, especially in people with asthma or other breathing conditions, so regular cleaning helps.

Insights, Analysis, and Developments

Editorial Note: Outdoor pet odor is easier to prevent than to remove. Picking up stool daily, rinsing favorite spots soon after use, and training a dog to use one gravel or mulch area can stop smells and lawn damage from building up. Products that use enzymes are often the best choice for porous surfaces, because they break down the uric acid crystals that keep releasing odor when they get damp. Care matters with chemicals: bleach should never be mixed with ammonia, vinegar or other cleaners, and pets and children should be kept away until treated areas are rinsed and dry. Owners of service animals who cannot easily clean a yard may be able to get help from family, a dog waste removal service or local volunteer programs.

Author Credentials: Ian C. Langtree is a writer, editor, and the founder and Editor-in-Chief of Disabled World, which he established in 2004 as one of the longest-running independent resources for disability news and information. Over more than two decades, he has written and edited thousands of articles on disability rights, health, accessibility, and assistive technology. Drawing on a global perspective shaped by extensive travel and lived experience, Ian is a committed advocate of the Social Model of Disability, the framework developed by disabled activists in the 1970s that focuses on removing societal barriers rather than on individual impairments. His writing is grounded in that framework and in a lasting commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.