R--CASTNET VII

SOL #: 68HERL26R0002Pre-Solicitation

Overview

Buyer

Environmental Protection Agency

LAND, ENFORCEMENT, AND AIR DIVISION

Washington, DC, 20460, United States

Place of Performance

Place of performance not available

NAICS

Environmental Consulting Services (541620)

PSC

Other Professional Services (R499)

Set Aside

No set aside specified

Original Source

https://sam.gov/opp/b289d11bb7084f56b418697cf7766320/view

Timeline

Posted

Jan 29, 2026

Last Updated

Mar 3, 2026

Qualification Details

Fit reasons

NAICS alignment with historical contract wins in similar service areas.
Scope strongly matches core technical capabilities and delivery model.

Risks

Past performance thresholds may require one additional teaming partner.
Potential clarification needed on staffing minimums before bid/no-bid.

Next steps

Validate eligibility requirements, assign capture owner, and schedule partner outreach to confirm teaming strategy before submission planning.

Quick Summary

The U.S. Environmental Protection Agency (EPA), specifically the Air Quality Assessment Division (AQAD), Office of State Air Partnerships (OSAP), anticipates awarding a single Indefinite-Delivery/Indefinite-Quantity (IDIQ) contract for CASTNET VII. This will be a full-and-open competition under FAR Part 15, with a one-year base period and four one-year option periods. The minimum guarantee for the base year is $750,000.00. The formal solicitation is expected to be posted on or about January 30, 2026.

Purpose & Scope

The Clean Air Status and Trends Network (CASTNET) is a long-term multipollutant monitoring network that measures spatial and temporal changes in ambient air quality and assesses atmospheric deposition across the U.S. Operating since 1987 with approximately 90 monitoring stations nationwide, CASTNET's primary objectives include:

Providing high-quality data on atmospheric concentrations and deposition of ozone (O3), particulate matter (PM), and PM constituents.
Supporting National Ambient Air Quality Standards (NAAQS) regulatory requirements.
Monitoring status and trends in regional air quality and atmospheric deposition.
Evaluating changes in air quality due to emissions and environmental impacts.
Improving understanding of PM and ozone formation and regional transport.
Validating and improving air quality and deposition models.
Assessing the effectiveness of EPA's emission reduction programs.
Acting as a platform for air quality and deposition research and supporting science/ecosystem studies.

CASTNET sites measure weekly average concentrations of various pollutants (sulfate, nitrate, ammonium, nitric acid, chloride, base cations) using filter packs. Some sites also deploy PM2.5 sensors, hourly O3, hourly meteorology, ammonia, and trace-level gases (NOy, NO, SO2, CO).

Contract & Timeline

Contract Type: Indefinite-Delivery/Indefinite-Quantity (IDIQ)
Competition: Full-and-Open (FAR Part 15)
Duration: One-year base + four one-year option periods
Minimum Guarantee: $750,000.00 for the base year
Set-Aside: None specified
Solicitation Release: On or about January 30, 2026
Published Date: January 29, 2026

Key Information

All responsible offerors may submit a proposal. Copies of the solicitation will be available on the SAM.gov website; paper copies will not be provided. An RFI/Sources Sought notice (68HERH25R0011) was previously posted on FedConnect on April 25, 2025. Interested parties are responsible for regularly monitoring the SAM.gov website for updates. Telephone inquiries will not be accepted.