Data / Federal awards / NAICS 541620 / TETRA TECH, INC.
TETRA TECH, INC.: 98 federal contract awards, $7.0 million obligated (FY2024 to FY2027)
TETRA TECH, INC. (UEI X38LAAB5HB64), Fairfax, VA, received 98 federal prime contract awards with $7.0 million obligated in fiscal years 2024 to 2027, from 5 agencies under 6 NAICS codes. Its largest buyer is Environmental Protection Agency ($6.6 million) and its largest code is NAICS 541620 Environmental Consulting Services.
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- UEI
- X38LAAB5HB64
- Location
- Fairfax, VA
- Business size
- Other Than Small Business
- Contract awards
- 98
- Obligated
- $7.0 million
- First action in window
- 2023-10-10
- Latest action
- 2026-09-25
Where the work is
NAICS codes, with the other winners in each.
| NAICS | Industry | Awards | Obligated |
|---|---|---|---|
| 541620 | Environmental Consulting Services | 47 | $4.1 million |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | 30 | $2.6 million |
| 541330 | Engineering Services | 2 | $402,334 |
| 541370 | Surveying and Mapping (except Geophysical) Services | 1 | $10,000 |
| 541690 | Other Scientific and Technical Consulting Services | 2 | $0 |
| 541611 | Administrative Management and General Management Consulting Services | 16 | $-30,299 |
Buying agencies
| Agency | Awards | Obligated |
|---|---|---|
| Environmental Protection Agency | 92 | $6.6 million |
| Department of Defense | 2 | $402,334 |
| Department of the Interior | 1 | $15,433 |
| Department of Commerce | 1 | $10,000 |
| Department of Health and Human Services | 2 | $0 |
Obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2024 | $3.2 million |
| FY2025 | $2.2 million |
| FY2026 | $1.6 million |
Contract awards
The 50 largest of 98 awards by dollars obligated in fiscal years 2024 to 2027.
| Award ID | Agency | Type | NAICS | What it buys | Obligated in window | Award value | Starts | Ends | Place of performance | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| 68HERW26F0193 | Environmental Protection Agency | Delivery Order | 541620 | R499 - NATIONAL LAKES ASSESSMENT 2027: PLANKTON IDENTIFICATION | $884,750 | $977,250 | February 1, 2027 | December 20, 2028 | Fairfax, VA | usaspending.gov |
| 68HERC24F0315 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016, TO 68HERC24F0315- 2025 NCCA PLANNING, SAMPLE COLLECTION, REPORTING RESULTS OF COMPLETED STUDIES | $579,367 | $1,069,996 | June 3, 2024 | November 30, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC25F0230 | Environmental Protection Agency | Delivery Order | 541620 | B516 - SUPPORT FOR THE 2025 NATIONAL COASTAL CONDITION ASSESSMENT (NCCA) FILLET TISSUE STUDY SAMPLE PREPARATION. | $570,139 | $600,872 | June 1, 2025 | May 31, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC25F0211 | Environmental Protection Agency | Delivery Order | 541715 | AH12 - TECHNICAL SUPPORT FOR DISTRICT OF COLUMBIA BACTERIA TMDL MODELING AND DEVELOPMENT | $381,320 | $381,320 | April 23, 2025 | March 31, 2028 | Fairfax, VA | usaspending.gov |
| W9127821F0371 | Department of Defense | Delivery Order | 541330 | EIS FOR AIR FORCE MAUI OPTICAL AND SUPER | $377,658 | $2,771,220 | September 19, 2021 | September 19, 2026 | Kula, HI | usaspending.gov |
| 68HERC25F0203 | Environmental Protection Agency | Delivery Order | 541620 | B516 - FEDERAL WATER QUALITY STANDARDS AND RULEMAKING SUPPORT. | $267,686 | $267,686 | June 1, 2025 | May 31, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC24F0182 | Environmental Protection Agency | Delivery Order | 541715 | THE GOAL OF THIS TASK ORDER IS TO IDENTIFY WHICH PUBLIC WATER SYSTEMS (PWS) HAVE AND WHICH DO NOT HAVE THE ABILITY TO TREAT, CHANGE SOURCES, | $243,826 | $243,826 | January 30, 2024 | January 31, 2026 | New York, NY | usaspending.gov |
| 68HERC21F0292 | Environmental Protection Agency | Delivery Order | 541620 | NEW TASK ORDER UNDER CONTRACT-68HERC20D0016, CONTRACTOR TETRA TECH, PROJECT-FEDERAL WQS AND RULEMAKING SUPPORT. THE CONTRACTOR SHALL SUPPORT | $217,721 | $1,202,997 | August 1, 2021 | July 31, 2024 | Fairfax, VA | usaspending.gov |
| 68HERC23F0158 | Environmental Protection Agency | Delivery Order | 541715 | THIS TASK ORDER SUPPORTS EPA ORD RESEARCH AND ASSESSMENT ACTIVITIES ASSOCIATED WITH THE CHESAPEAKE SDR IN 4 AREAS: (A) COMMUNITY ENGAGEMENT | $192,076 | $624,001 | February 7, 2023 | December 31, 2025 | Crisfield, MD | usaspending.gov |
| 68HERW26F0182 | Environmental Protection Agency | Delivery Order | 541620 | R499 - TECHNICAL SUPPORT FOR WATER QUALITY STANDARDS (WQS) RULEMAKINGS, DETERMINATIONS, AND ACTIONS. | $184,493 | $357,557 | August 19, 2026 | August 18, 2027 | Fairfax, VA | usaspending.gov |
| 68HERF26F0046 | Environmental Protection Agency | Delivery Order | 541715 | AJ11: TECHNICAL SUPPORT FOR CONTINUOUS MONITORING AND ASSESSMENT DOCUMENT | $179,979 | $179,979 | February 27, 2026 | February 29, 2028 | Fairfax, VA | usaspending.gov |
| 68HERC23F0505 | Environmental Protection Agency | Delivery Order | 541715 | THE PURPOSE OF THIS TASK ORDER IS TO SUPPORT EPA, IN COORDINATION WITH THE WVDEP, IN DEVELOPMENT OF TMDLS FOR WATERBODIES WITHIN THE LOWER G | $160,291 | $290,217 | September 1, 2023 | April 21, 2025 | Huntington, WV | usaspending.gov |
| 68HERC24F0390 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016, TASK ORDER 68HERC24F0390 FOR MAINTENANCE OF WATER QUALITY STANDARDS INFORMATION AND TRACKING SYSTEM (WQSITS) DATA IN | $156,968 | $235,852 | June 20, 2024 | October 31, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC25F0224 | Environmental Protection Agency | Delivery Order | 541715 | AH12 - TASK ORDER - NCCA: EXTERNAL BENTHIC QA | $156,628 | $269,788 | May 5, 2025 | November 2, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC25F0053 | Environmental Protection Agency | Delivery Order | 541715 | NEW TASK ORDER UNDER CONTRACT 68HERC22D0026 TO BE PERFORMED ACCORDING TO THE ATTACHED PERFORMANCE WORK STATEMENT (PWS) TITLED, "PFAS SPATIAL | $155,000 | $155,000 | November 4, 2024 | October 31, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC23F0371 | Environmental Protection Agency | Delivery Order | 541715 | THE PRIMARY OBJECTIVE OF THIS TASK ORDER (TO) IS TO CONDUCT LABORATORY WORK AND QUALITY ASSURANCE OF SAMPLES COLLECTED AS PART OF NRSA TO AC | $149,536 | $362,645 | July 5, 2023 | August 12, 2025 | Washington, DC | usaspending.gov |
| 68HERW26F0195 | Environmental Protection Agency | Delivery Order | 541620 | NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM WATER QUALITY TECHNICAL SUPPORT. | $147,334 | $147,334 | August 24, 2026 | August 23, 2027 | Fairfax, VA | usaspending.gov |
| 68HERC25F0030 | Environmental Protection Agency | Delivery Order | 541620 | TASK ORDER AWARD - AUTOMATED DATA ANALYSIS AND ASSESSMENT METHODOLOGY TOOL FOR MT / WY AND REGION 8 TRIBES. | $146,099 | $186,011 | January 15, 2025 | January 14, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC24F0170 | Environmental Protection Agency | Delivery Order | 541715 | THE GOAL OF THIS RESEARCH PROJECT IS TO EVALUATE THE FEASIBILITY OF RECOVERY SUCH MINERALS AND ELEMENTS FROM AMD MATRICES IN THE AREA OF SHA | $138,957 | $138,957 | January 24, 2024 | January 31, 2026 | Cincinnati, OH | usaspending.gov |
| 68HERW26F0221 | Environmental Protection Agency | Delivery Order | 541620 | SUPPORT FOR THE 2025 NATIONAL COASTAL CONDITION ASSESSMENT (NCCA) FILLET TISSUE STUDY SAMPLE SHIPMENTS, DATA QUALITY REVIEW, AND REPORTING R | $125,000 | $131,800 | September 8, 2026 | March 8, 2027 | Fairfax, VA | usaspending.gov |
| 68HERC23F0546 | Environmental Protection Agency | Delivery Order | 541620 | THE CONTRACTOR WILL PROVIDE EXPERT TECHNICAL SUPPORT FOR NPDES WATER QUALITY WHOLE EFFLUENT TOXICITY PROGRAM. | $123,934 | $278,155 | September 20, 2023 | September 19, 2024 | Fairfax, VA | usaspending.gov |
| 68HERC25F0078 | Environmental Protection Agency | Delivery Order | 541715 | NEW TASK ORDER - EXPANDING THE USE AND FUNCTIONALITY OF A CAUSAL ASSESSMENT SCREENING TOOL (CASTOOL) | $123,812 | $123,812 | November 21, 2024 | May 31, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC24F0185 | Environmental Protection Agency | Delivery Order | 541620 | SUPPORT EPA REGION 8 WATERSHED SECTION TO MEET CLEAN WATER ACT REQUIREMENTS AND PRODUCTION OF TOTAL MAXIMUM DAILY LOADS. | $119,971 | $119,995 | January 25, 2024 | January 25, 2025 | Fairfax, VA | usaspending.gov |
| 68HERW26D0007 | Environmental Protection Agency | IDC | 541620 | R499-ECOLOGICAL AND HUMAN HEALTH RISKS OF CONTAMINANTS IN WATER, FISH AND SEDIMENTS AND OF MICROBIAL PATHOGENS IN SURFACE WATERS | $100,000 | $25,000,000 | April 20, 2026 | usaspending.gov | ||
| 68HERC24F0115 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016 - TASK ORDER TECHNICAL SUPPORT FOR MODELING EDUCATION. | $98,966 | $307,438 | January 22, 2024 | November 30, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC24F0476 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016, TO 68HERC24F0476 - WATER PERMITS DIVISION (WPD) NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) WATER QUALIT | $98,369 | $100,891 | September 20, 2024 | September 19, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC24F0472 | Environmental Protection Agency | Delivery Order | 541715 | THIS NEW TASK ORDER TITLED "COMPOST VALUE" INCLUDES THE FOLLOWING TASKS: TASK 1: ESTABLISH COMMUNICATION AND QAPP TASK 2: RESPOND TO EXTERNA | $93,020 | $93,020 | August 19, 2024 | April 11, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC24F0230 | Environmental Protection Agency | Delivery Order | 541715 | THE PRIMARY OBJECTIVE OF THE PROPOSED WORK IS TO BEGIN THE PROCESS OF DEFINING WHICH ALASKA PWSS ARE VULNERABLE TO CYANOBACTERIAL BLOOMS. | $92,936 | $92,936 | March 11, 2024 | April 1, 2026 | Anchorage, AK | usaspending.gov |
| 68HERC25F0159 | Environmental Protection Agency | Delivery Order | 541715 | REPORTS, TOOLS, AND DATA VISUALIZATIONS FOR ASSESSING AQUATIC BIOLOGICAL ENDPOINTS | $89,872 | $89,872 | February 5, 2025 | November 8, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC23F0260 | Environmental Protection Agency | Delivery Order | 541620 | HYPOXIA TASK FORCE SUPPORT (HTF):THE CONTRACTOR SHALL SUPPORT EPA IN COORDINATING THE HTF BY PROVIDING TECHNICAL SUPPORT INCLUDING: QA & QC, | $86,789 | $596,596 | June 2, 2023 | June 1, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC23F0136 | Environmental Protection Agency | Delivery Order | 541715 | THIS TASK ORDER IS DESIGNED TO PROVIDE SUPPORT IN EFFORTS TO CHARACTERIZE BLACKWATER SITES THAT HAVE BEEN SAMPLED AS PART OF U.S. EPAS NATIO | $82,226 | $136,976 | February 1, 2023 | September 30, 2024 | Cincinnati, OH | usaspending.gov |
| 68HERC24F0396 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016, TASK ORDER 68HERC24F0396 - TECHNICAL SUPPORT FOR EPA RULEMAKINGS, DETERMINATIONS AND OTHER WATER QUALITY STANDARDS ( | $81,820 | $208,724 | June 20, 2024 | October 31, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC23F0225 | Environmental Protection Agency | Delivery Order | 541715 | THE WORK DESCRIBED IN THIS TASK ORDER (TO) SUPPORTS THE ENVIRONMENTAL PROTECTION AGENCY (EPA) OFFICE OF RESEARCH AND DEVELOPMENT, CENTER FOR | $80,344 | $440,216 | March 23, 2023 | March 31, 2026 | Washington, DC | usaspending.gov |
| 68HERC24F0461 | Environmental Protection Agency | Delivery Order | 541620 | CONTRACT 68HERC20D0016, TASK ORDER 68HERC24F0461 - FEDERAL WATER QUALITY STANDARDS (WQS) AND RULEMAKING SUPPORT. | $75,065 | $544,573 | August 6, 2024 | May 31, 2025 | Fairfax, VA | usaspending.gov |
| 68HERC25F0183 | Environmental Protection Agency | Delivery Order | 541620 | B516 - TECHNICAL SUPPORT FOR DEVELOPMENT OF HUMAN HEALTH WATER QUALITY CRITERIA | $72,451 | $638,425 | March 25, 2025 | March 24, 2026 | Fairfax, VA | usaspending.gov |
| 68HERC25F0156 | Environmental Protection Agency | Delivery Order | 541715 | NEW TASK ORDER - "ASSESSMENT OF THE POTENTIAL FOR ENHANCED EFFICIENCY FERTILIZERS (EEFS) IN THE U.S. USING SWAT" | $67,897 | $67,897 | January 28, 2025 | January 31, 2027 | Fairfax, VA | usaspending.gov |
| 68HERC24F0072 | Environmental Protection Agency | Delivery Order | 541715 | THE PURPOSE OF THIS PR IS TO AWARD A NEW ORDER FOR DRINKING WATER SYSTEM OPERATION INFORMATION UNDER CONTRACT 68HERC22D0026 THE REQUIRED DOC | $67,650 | $67,650 | November 15, 2023 | November 30, 2025 | Cincinnati, OH | usaspending.gov |
| 68HERC23F0507 | Environmental Protection Agency | Delivery Order | 541715 | THE PURPOSE OF THIS TASK ORDER IS TO ACCUMULATE AND DOCUMENT SITE INFORMATION AND PERFORMANCE DATA ON WATER TREATMENT TECHNOLOGIES FOR METAL | $67,012 | $177,658 | September 13, 2023 | December 31, 2025 | Cincinnati, OH | usaspending.gov |
| 68HERC23F0226 | Environmental Protection Agency | Delivery Order | 541715 | THE WORK DESCRIBED IN THIS TASK ORDER (TO) SUPPORTS THE ENVIRONMENTAL PROTECTION AGENCY (EPA) OFFICE OF RESEARCH AND DEVELOPMENT, CENTER FOR | $59,984 | $152,902 | March 23, 2023 | March 31, 2026 | Washington, DC | usaspending.gov |
| 68HERC24F0281 | Environmental Protection Agency | Delivery Order | 541715 | NEW TASK ORDER ON CONTRACT 68HERC22D0026 FOR FRESHWATER EXPLORER DATA LAYERS. IN PARTICULAR, PFAS DATA LAYERS WILL BE CURATED, COMBINED, AND | $43,962 | $43,962 | April 10, 2024 | April 9, 2025 | Bridgeport, CT | usaspending.gov |
| 68HERC23F0528 | Environmental Protection Agency | Delivery Order | 541715 | THIS TASK ORDER COVERS THE FOLLOWING AREAS: 1. DEVELOPMENT SUPPORT AND MAINTENANCE OF REGIONAL MONITORING NETWORKS (RMNS) IN STREAMS, LAKES, | $41,730 | $364,807 | September 14, 2023 | September 30, 2025 | Washington, DC | usaspending.gov |
| 68HERC24F0059 | Environmental Protection Agency | Delivery Order | 541715 | THE PURPOSE OF THIS PR IS TO AWARD A NEW ORDER FOR LAND APPLICATION OF COMPOSTING PROJECTS UNDER CONTRACT 68HERC22D0026 THE REQUIRED DOCUMEN | $25,831 | $25,831 | November 1, 2023 | June 30, 2024 | Washington, DC | usaspending.gov |
| W9127820F0461 | Department of Defense | Delivery Order | 541330 | ENVIRONMENTAL ASSESSMENTS - BASE | $24,676 | $1,394,668 | September 24, 2020 | July 30, 2025 | Fort Worth, TX | usaspending.gov |
| 140G0226P0294 | Department of the Interior | Purchase Order | 541620 | SANDUSKY BAY HYDRODYNAMIC AND PARTICLE TRANSPORT MODELING SERVICES | $15,433 | $15,433 | September 18, 2026 | March 21, 2027 | Port Clinton, OH | usaspending.gov |
| 68HERC23F0449 | Environmental Protection Agency | Delivery Order | 541620 | SUPPORT FOR FURTHER DEVELOPMENT OF THE METALS AQUATIC LIFE CRITERIA AND CHEMISTRY MAP (METALICC-MAP) | $12,327 | $143,588 | August 8, 2023 | September 18, 2025 | Fairfax, VA | usaspending.gov |
| 1305M226D0035 | Department of Commerce | IDC | 541370 | THE CONTRACTOR SHALL PROVIDE COASTAL GEOSPATIAL SERVICES, APPROVED VIA OR-25-01298, IN ACCORDANCE WITH THE STATEMENT OF WORK IN SUPPORT OF T | $10,000 | $49,000,000 | August 29, 2026 | usaspending.gov | ||
| 0004 | Environmental Protection Agency | Delivery Order | 541611 | IGF::CL::IGF CHESAPEAKE BAY TMDL WATERSHED IMPLEMENTATION PLAN AND MODELING SUPPORT | $7,840 | $8,547,347 | April 1, 2018 | September 29, 2022 | Fairfax, VA | usaspending.gov |
| 68HERC22F0367 | Environmental Protection Agency | Delivery Order | 541611 | NUTRIENT-SCIENTIFIC TECHNICAL EXCHANGE PARTNERSHIP SUPPORT (N-STEPS) | $4,330 | $699,976 | July 18, 2022 | September 29, 2023 | Fairfax, VA | usaspending.gov |
| 0001 | Environmental Protection Agency | Delivery Order | 541611 | IGF::CL::IGF GENERAL TMDL SUPPORT FOR ALASKA, IDAHO, OREGON AND WASHINGTON WATERS | $2,801 | $2,398,788 | February 14, 2018 | March 31, 2023 | Fairfax, VA | usaspending.gov |
| 68HERC19F0037 | Environmental Protection Agency | Delivery Order | 541611 | TECHNICAL SUPPORT FOR NONPOINT SOURCE LOAD REDUCTION MODELS | $59 | $395,168 | December 4, 2018 | August 2, 2023 | Fairfax, VA | usaspending.gov |
Also on SpecStream
- All recipients under NAICS 541620 Environmental Consulting Services
- All recipients under NAICS 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- All recipients under NAICS 541330 Engineering Services
- Open opportunities under NAICS 541620
- Open opportunities under NAICS 541715
- Open opportunities under NAICS 541330
Updated October 6, 2026. Read from USAspending.gov. Public U.S. federal spending data (U.S. Department of the Treasury). Obligations are the contract actions dated in fiscal years 2024 to 2027 of the USAspending.gov award archive of 2026-10-06; a contract's total value is its current value as USAspending reports it, including earlier years. Recipients are matched on their SAM.gov UEI, never on the name, and are shown as the government prints them. Sole proprietorships and opted-out entities count in the totals and are not named. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.