The Importance of Marking Flags

Pink triangular flag flying in the wind

Marking flags play an important role in multiple industries. They maintain safety by alerting workers about hazard locations. These flags come in various colors, with each color signifying a different warning. Learn more about the industries that use marking flags and the meaning of each color.

Construction Flags

The American Public Works Association (APWA) recommends using marking flags on construction projects to maintain safety. These utility flags are color coded and help workers easily identify the location of underground utilities. Here’s a guide on the meaning of construction flags:


Red is one of the most common marking flags and signifies the location of electric utilities, including cables and power lines. Marking these locations helps avoid electrocution and power outages.


General contractors place white marking flags around a construction site to signify excavation locations. The size of a white flagged area helps provide information on the project’s size.


Construction companies use pink flags as temporary survey markings. Surveyors measure a site and use these flags to mark their measurements for quality assurance. Pink flags also signify unidentified utilities.


Yellow flags serve an important purpose for the construction industry: They alert workers about the location of gaseous utility lines, including petroleum and steam. These flags help eliminate the risk of gas leaks and explosions.


Construction companies don’t want to be responsible for cutting off communication systems, which is why they use orange flags to mark off locations of phone and TV cable lines.


Blue flags play a critical role in construction projects since they mark the location of drinking water lines. Damaging these utility lines creates flooding issues and could restrict water access to homes and commercial companies.


Purple marking flags signal the location of irrigation and reclaimed water lines to onsite workers.

Learn more about marking flags and see how Axiom’s premium utility flags enhance safety for various industries.

Agriculture Marking Flags

Growers and farm operators are encouraged to use agriculture field marker flags to show workers the locations of safe fields and which herbicide technologies have been used. Each marking flag color has an attached meaning to enhance safety on farms. These colors include:


Red is used to warn workers to exercise extreme caution, and conventional varieties with no herbicide technology traits were used.


Farmers use bright yellow marking flags to alert workers that Clearfield® rice or STS® soybean technologies were used.


A white marking flag is used in the agriculture industry to represent that the Roundup Ready® used in the field is tolerant to glyphosate herbicide.


A white marking flag is used in the agriculture industry to represent that the Roundup Ready® used in the field is tolerant to glyphosate herbicide.


Teal flags alert workers that the chemicals used must be tolerant to 2, 4D, and FOP herbicides. Some teal flags include white stripes, which indicate tolerance to glyphosate.


Bright green flags are displayed to alert that glufosinate herbicide tolerant Liberty Link® technology was used.

Axiom’s Line of Quality Field Marker Flags

We know the important role marking flags play in maintaining safety on your jobsite. That’s why we carry an extensive line of survey and land marking flags built for everyday use. Our high-quality field marker flags are available in varying heights to meet specific requirements and feature reflective strips that offer easy visibility at a distance. Our marking flags are also:

  • Built to endure harsh weather conditions
  • Made from premium materials that allow for reuse
  • Customizable so you can include your company’s logo

Keeping workers safe is a top priority for any business owner, and marking your projects with our utility flags means your employees always know the locations of hazards.

Axiom Products: A Leading Provider of Chemical Safety Equipment

Axiom has been a leading supplier of chemical safety equipment since 2004. Along with our selection of marking flags, we also provide measuring pitchers, containers, and cups that guarantee accurate and precise chemical measurement evhttps://measuring-products/containers/ery time. We’re a family-owned and -operated company committed to providing superior products, outstanding customer service, and forward-thinking innovation. Contact Axiom Products today to learn more about our line of marking flags and measuring products.