PSC Z1NC

Overview

The Product Service Code (PSC) system is a standardized taxonomy used across U.S. federal procurement to classify goods and services for contracting, reporting, and analysis. PSCs are recorded in FPDS/SAM award records and maintained through the Product and Service Code Manual and related governance documents to ensure consistent award coding, spend visibility, and comparability across agencies ¹.

The PSC Z1NC — Maintenance of Pollution Abatement and Control Facilities — applies to facility-related maintenance activities that support pollution-abatement and control infrastructure. Agencies use this PSC to tag maintenance awards so obligations for pollution-control facility upkeep and services can be identified in FPDS and downstream reporting tools ¹.

• See also on G2X:
  • G2X — PSC Z1NC overview
  • G2X — PSC Z1ND (Maintenance of Sewage and Waste Facilities)
  • G2X — PSC Z1NE (Maintenance of Water Supply Facilities)

What this PSC covers

• Maintenance of pollution-abatement and control facilities (general descriptor).
• Facility-level preventive maintenance and scheduled servicing.
• Inspection, testing, and calibration of pollution-control systems.
• Emergency and corrective repairs to pollution-control equipment.
• Supply of spare parts and replacement components tied to maintenance tasks.
• Monitoring and record-keeping related to maintenance activities.

Specific task-level inclusions or exclusions are not itemized in the PSC Manual; agencies apply the PSC based on the award’s primary maintenance purpose ¹.

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | - PSC | Z1ND | Maintenance of Sewage and Waste Facilities PSC | Z1NE | Maintenance of Water Supply Facilities PSC | Z1NB | Maintenance of Heating and Cooling Plants

These related PSCs are other facility-related maintenance categories in the PSC Manual and frequently appear alongside Z1NC in agency award portfolios ¹.

Contracting considerations

• Award coding: Assign the PSC that best matches the contract’s primary purpose (maintenance of pollution-abatement/control facilities → Z1NC); inconsistent coding reduces reporting accuracy and complicates spend analysis ¹.
• Solicitation structure: Statements of work should describe facility maintenance outcomes, system boundaries, and major equipment to support accurate PSC selection; the PSC Manual does not prescribe SOW language or templates ¹.
• Set-asides and socio-economic rules: These follow NAICS-based size standards and procurement rules; the PSC itself is a classification and is not a NAICS-based size standard — Not specified by official sources ¹.

Spend and reporting notes

Agencies and analysts use PSC tags in FPDS and USAspending to aggregate obligations for maintenance categories; PSC-based queries and API filters enable programmatic spend analysis and portfolio reporting through USAspending endpoints ².

Frequently asked questions

• What is the authoritative source for PSC definitions and usage? The Product and Service Code Manual on Acquisition.gov is the authoritative source for PSC codes, definitions, and maintenance/versioning processes; the manual and its associated files provide the current PSC lists and governance guidance ¹.

• When should Z1NC be applied instead of another maintenance PSC? Apply Z1NC when the contract’s primary purpose is maintenance of pollution-abatement or control facilities. If the award’s primary maintenance target is a different facility type, select the PSC that most directly reflects that primary purpose ¹.

• How can award data for Z1NC be analyzed for obligated spend? Use USAspending’s advanced search or API endpoints to filter awards by PSC value and retrieve obligations; the USAspending API documentation describes PSC filter parameters and supported endpoints for programmatic queries ².

• How are changes or additions to PSCs requested? The SOP and procedures published with the PSC Manual describe the PSC change request and approval process; stakeholders submit a business case per the SOP to propose new or revised PSC entries ³.

Useful resources

• G2X — PSC Z1NC overview
• Acquisition.GOV — PSC Manual (PSC Manual April 2025 PDF). https://www.acquisition.gov/content/psc-manual-april-2025.pdf
• USAspending API documentation (endpoints and PSC filter support). https://api.usaspending.gov/docs/endpoints
• Acquisition.GOV — SOP_PSC_Updated_Process_Final_March_19_2020. https://www.acquisition.gov/content/sop_psc_updated_process_final_march_19_2020.docx

References

1. Acquisition.GOV — PSC Manual April 2025 PDF. https://www.acquisition.gov/content/psc-manual-april-2025.pdf
2. USAspending.gov — API endpoints and documentation (PSC search/filter). https://api.usaspending.gov/docs/endpoints
3. Acquisition.GOV — SOP_PSC_Updated_Process_Final_March_19_2020. https://www.acquisition.gov/content/sop_psc_updated_process_final_march_19_2020.docx