Underground Utility Colors – Know Before You Dig

Planning a digging or construction project? Understanding underground utility colors can help you recognize marked utility lines and plan excavation more safely. Common colors include red for electric, yellow for natural gas, orange for communications, blue for water, and green for sewer lines. White markings generally indicate the proposed excavation area.

Before digging for a fence, landscaping, tree planting, pool, deck, or construction project, contact JULIE in Illinois to notify participating utility companies. Always respect utility markings and follow safe-digging practices. If privately owned utilities are present, additional private utility locating may be required.

Call 811 before you dig, know what the underground utility colors mean, and protect your project from unnecessary damage and delays.