Operation of the clean air status and trends network (CASTNET)
Active Indefinite Delivery Contract Awarded
- Contract number
- 68HERL26D0001
- Awardee
-
WSP USA Inc. UEI LPC6MPU3QA65
- Awarding agency
-
Environmental Protection Agency
- Task orders
- 5 $1,940,321 obligated
Award facts
- Opportunity
-
- Castnet VII Pre-Solicitation · 68HERL26R0002 · Posted Jan 29, 2026
- Combined order value
- $6,033,483 Current and potential, with all options
- Last date to order 3% complete
- IDV ceiling 4% used
- $43,443,399.00
- Maximum order
- $10,016,903.00
- Award type
- Single award
- Who can order
- Only the awarding agency
- Funding agency
- Office of Air and Radiation Headquarters Offices, Environmental Protection Agency
- NAICS code
- 541620 Environmental Consulting Services
- PSC
- R499 Support- Professional: Other
- Set-aside
- No set-aside
- Competition
- Full and Open Competition · 2 offers Negotiated Proposal / Quote
- Pricing
- Order Dependent (IDV only)
Award details come from SAM.gov/FPDS.
About this IDV
The Environmental Protection Agency, Office of Air and Radiation awarded a single-award indefinite-delivery contract to WSP USA Inc. on September 8, 2026, to operate and maintain the Clean Air Status and Trends Network (CASTNET), with a contract ceiling of $43,443,399 and an ultimate completion date of November 5, 2031.
CASTNET is a long-term multipollutant air-quality monitoring program operating since 1987 across approximately 90 monitoring stations nationwide. The contract requires provision of high-quality atmospheric concentration and deposition data for ozone, particulate matter, and related constituents to support compliance with National Ambient Air Quality Standards regulatory requirements. Performance spans broad geographic regions of the United States in cooperation with federal, tribal, state, and local partners.
The contract consists of a one-year base period with four one-year option periods. The base-year minimum guarantee is $750,000. NAICS 541620 applies. The originating solicitation was posted January 30, 2026, and the procurement was conducted as a full-and-open competition under FAR Part 15 with no set-aside designation. No recent task orders are present in the source.
Task orders
| Task order | Ordering agency | Obligated | Awarded |
|---|---|---|---|
| Indeterminate costs and non-routine maintenance | Environmental Protection Agency | $200,000 | |
| Tribal base program | Environmental Protection Agency | $187,464 | |
| National atmospheric deposition program (NADP) annual support | Environmental Protection Agency | $158,000 | |
| Supplemental monitoring studies at castnet sites | Environmental Protection Agency | $50,000 | |
| Base program | Environmental Protection Agency | $1,344,857 |
Quick answers
Who was awarded contract 68HERL26D0001?
68HERL26D0001 was awarded to WSP USA Inc. by Environmental Protection Agency on September 8, 2026.
How much is contract 68HERL26D0001 worth?
Orders under 68HERL26D0001 have obligated $1,940,321. Their combined current value, with exercised options, is $6,033,483. 68HERL26D0001's own ceiling is $43,443,399. A single order can be worth up to $10,016,903.
How many orders have been placed under contract 68HERL26D0001?
5 orders have been placed under 68HERL26D0001, the latest on November 6, 2026.
Which agency awarded contract 68HERL26D0001?
Environmental Protection Agency awarded 68HERL26D0001, with funding from Office of Air and Radiation (Headquarters Offices).
Who can order from contract 68HERL26D0001?
68HERL26D0001 is a single award indefinite delivery contract. Only the awarding agency can place orders on it.
Was contract 68HERL26D0001 competed?
The extent of competition for 68HERL26D0001 was full and open competition. The government received 2 offers.
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