PSC H146

Overview

The Product Service Code (PSC) system is a government-wide taxonomy used to classify products and services in federal procurements. PSCs are recorded in award-reporting systems (for example, FPDS and SAM) to standardize descriptions, enable spend analysis, and support acquisition planning; PSC list maintenance and usage guidance are reflected in federal acquisition policy and FPDS documentation. ¹

PSC H146 — Quality Control- Water Purification and Sewage Treatment Equipment — is a reporting/classification code applied to federal requirements and awards for quality-control, testing, inspection, and related services or equipment associated with water purification and sewage treatment systems. Agencies assign H146 at the contract- or line-item level in FPDS and related systems to tag work such as water sampling, laboratory testing, regulatory compliance testing, and operational quality assurance for potable water, wastewater, and treatment equipment. ²

• See also on G2X:
  • G2X — PSC H146 overview
  • G2X — NAICS 541380
  • G2X — NAICS 221310

What this PSC covers

• Water quality testing and analysis (microbiological and chemical)
• Sampling for regulatory and operational monitoring
• Laboratory-based water purification and sewage treatment testing
• Equipment performance verification for purification and treatment units
• Operational quality assurance and inspection services
• Regulatory compliance testing tied to treatment and discharge standards

Related NAICS and PSC codes

Common contract activities

• Routine potable-water and wastewater sampling tied to laboratory analysis and reporting (microbiological, chemical, and indicator testing). ²
• Certification or performance testing of water-purification units and sewage-treatment equipment after installation, repair, or upgrade. ²
• Periodic operational quality-assurance audits of treatment system performance and support for regulatory compliance documentation and reporting. ²

Contracting notes

• PSCs are classification/reporting codes and do not themselves establish NAICS assignments, SBA size standards, or procurement procedures; those determinations are made by the contracting activity on a per-solicitation basis. Not specified by official sources. ²
• Agencies commonly pair H146 with NAICS such as 541380 and 221310 in award records; consult FPDS or USAspending reports for agency-specific historical obligations and award details. ³

Frequently asked questions

• Q: Which agencies most frequently use PSC H146?
  A: Multiple civil and defense agencies report H146 in FPDS and related systems; examples in award records include public health, municipal water authorities, Veterans Affairs, and DoD components. Consult FPDS or USAspending for up-to-date award lists and obligations. ²

• Q: Is H146 tied to a single NAICS code?
  A: No. H146 is a PSC and may appear with different NAICS codes depending on the primary work scope; common pairings include 541380 and 221310. The contracting officer selects the NAICS appropriate to the predominant work. ³

• Q: Do PSCs define small-business size standards or set‑aside rules?
  A: No. PSCs do not set size standards. Small-business size standards are established by NAICS and the SBA; those rules apply when an agency selects a NAICS for a procurement. Not specified by official sources. ²

• Q: Where are PSC definitions and the active PSC list published?
  A: The active PSC list and classification guidance are maintained in federal acquisition reference materials and FPDS documentation; acquisition policy (PGI) explains PSC usage in contract reporting and CLIN/SLIN structures. ¹

• See also on G2X: https://app.g2xchange.com/psc/H146

Useful resources

• G2X — PSC H146 overview
• FPDS — PSC (Product or Service Code) reference/help: https://www.fpds.gov/help/PSC.htm
• Acquisition.gov — PGI 204.71 (CLIN/SLIN and PSC usage guidance): https://www.acquisition.gov/node/55710/printable/print
• USAspending — API and PSC/filter endpoints for award and spending analytics: https://api.usaspending.gov/docs/endpoints

References

1. PGI 204.71 — UNIFORM CONTRACT LINE ITEM NUMBERING SYSTEM, Acquisition.gov. https://www.acquisition.gov/node/55710/printable/print
2. PSC — Product or Service Codes, FPDS. https://www.fpds.gov/help/PSC.htm
3. USAspending API documentation — endpoints and PSC filter examples. https://api.usaspending.gov/docs/endpoints