NIGP 92583: Sanitary Engineering

NIGP 92583 Sanitary Engineering, an Item code, encompasses the design, inspection, rehabilitation, and construction administration of water distribution, wastewater collection, treatment facility, lift station, and force main infrastructure. State and local governments use this code to procure engineering services for capital improvements, condition assessments, permitting, hydraulic modeling, and operational support of sanitary sewer systems and associated water infrastructure across planning, design, and construction phases.

Water and wastewater utilities dominate recent activity, with issuing bodies spanning municipal water districts, county water authorities, city departments of water utilities, and regional transportation planning organizations. West Basin Municipal Water District (California), Fulton County Department of Public Works (Georgia), Dorchester County (South Carolina), the City of Phoenix (Arizona), the City of Dallas (Texas), and the City of Daytona Beach (Florida) appear repeatedly as repeat buyers. On-call professional services agreements structured around hourly labor rates and time-and-materials compensation are the dominant contract vehicle, with single awards to multiple firms (typically two to five) and task orders issued as work is needed. Representative recent activity includes West Basin's on-call RFP for hydraulic modeling, engineering evaluations, treatment facility planning and design, and construction phase support across water, recycled water, and wastewater systems (proposals due July 14, 2026, estimated $3,000,000 total value across up to five firms through June 2029); Fulton County's progressive design-build RFP for the Friendship Pump Station and approximately 12,500 linear feet of force main (proposals due August 12, 2026); Dorchester County's RFQ for on-call water and wastewater engineering services including master planning, hydraulic modeling, and construction administration (proposals due February 3, 2026); and the City of Phoenix's RFQ for large diameter ductile iron pipe sewer rehabilitation engineering and large diameter gravity sewer design for the Lake Pleasant Water Treatment Plant (proposals due July 6, 2026 and May 1, 2026 respectively). Georgia cities and counties pursuing Community Development Block Grant Disaster Recovery funding generate a secondary wave of activity around engineering design and inspection services for localized infrastructure projects, with proposals due June 22, 2026 from Wadley, Lincolnton, Millen, Waynesboro, and Sandersville. Lift station replacement and force main construction projects appear consistently across Florida municipalities and Georgia water authorities. Geographic concentration is strongest in California (West Basin), Arizona (Phoenix), Georgia (multiple counties and cities), South Carolina (Dorchester), Texas (Dallas and Dallas County), and Florida (Daytona Beach, Orange County). Prevailing wage compliance, California Labor Code registration, professional liability insurance in the $1,000,000 to $2,000,000 range, and state professional engineering licensure are standard contract requirements. Small Business Enterprise and local business enterprise preferences are common evaluation scoring elements, particularly in California and Texas procurement. Design deliverables typically must be sealed by California-licensed, Florida-registered, or state-qualified professional engineers, with fee structures fixed at hourly rates or percentage-of-construction-cost bases, rarely exceeding 3 percent annual rate escalation.