When it comes to locating underground utilities, understanding the colour codes used for markouts is essential. These colours help professionals identify different types of utilities and potential hazards. Let's dive into the most commonly used utility colours in New Zealand:
Orange (Electric Power)
Orange is universally recognized as the colour for electric power lines. When you see orange markings on the ground, it indicates the presence of electrical cables or conduits. Always exercise caution around orange marks, as contact with live power lines can be dangerous.
Yellow (Gas)
Yellow is commonly used for gas lines. If you encounter yellow markings during excavation, be aware that natural gas pipes or distribution lines are nearby. Gas leaks can pose serious risks, so follow safety protocols when working near yellow marks.
Purple (Communications)
Purple is associated with communication lines. This includes telephone, internet, cable TV, and other data transmission cables. Purple marks help prevent disruptions to essential communication services.
Blue (Potable Water)
Blue signifies water lines. Whether it's water supply pipes or wastewater/sewer lines, blue marks indicate the presence of water-related infrastructure. Avoid digging in areas marked with blue to prevent disruptions to water services.
Green (Stormwater)
Green is used to symbolise stormwater systems. These lines handle rainwater runoff and drainage. Identifying green marks helps prevent contamination and flooding issues. The other colour that is sometimes used for stormwater in NZ is pink. However green is more widely understood.
Red (Wastewater)
Red is associated with wastewater/sewer lines. It's crucial to avoid disturbing sewer pipes, as leaks or blockages can lead to health hazards and environmental damage. Always respect red markings and take necessary precautions. Sewer is also referred to as wastewater.
Pink (Unknown or Stormwater)
Pink may indicate unidentified or temporary markings. It is also sometimes used to indicate Stormwater in NZ as per worksafe guidelines. Always verify pink marks with other available information.
White (Proposed Excavation)
White is used to outline the area of a proposed excavation. This helps utility locators understand the scope of work and avoid potential conflicts with existing utilities.
PAS128 and NZ Guidelines
To ensure accurate utility location practices, New Zealand follows guidelines similar to the PAS128 standard used internationally. PAS128 provides a framework for utility mapping, data quality, and risk assessment. When planning any excavation, consult these guidelines to enhance safety and efficiency.
Remember, before any digging or construction work, use reliable sources like beforeUdig and adhere to the colour codes. And for comprehensive utility data, explore UtilityFinder. Our digital map ensures you have the right information at your fingertips.