United States · Federal contract register · Supplier record

TETRA TECH EC, INC.

Line: Environmental remediation (F108)Register loaded to September 2026Compiled 6 October 2026

TETRA TECH EC, INC. — United States · Federal contract register · Supplier record: 62 contracts, all years ($458,918,756 · Jun 2004 – May 2026); $54.4M since January 2024 (17 contracts · 1 agency); 14th rank in the line (of 953 suppliers · 1.44%); 22 agencies never served ($1.8B on the line without TETRA TECH EC, INC.).

Assay record ASY-US-0P4KDRL19S · Cite as: Assay Systems, “TETRA TECH EC, INC. in the USAspending register”, https://assay-systems.com/register/us/tetra-tech-ec-inc/

62
contracts, all years
$458,918,756 · Jun 2004 – May 2026
$54.4M
since January 2024
17 contracts · 1 agency
14th
rank in the line
of 953 suppliers · 1.44%
22
agencies never served
$1.8B on the line without TETRA TECH EC, INC.

Own record by year

2019 onward
$314K
$10.9M
$2.3M
$2.8M
$18.9M
$27.7M
$26.3M
$412K
20192020202120222023202420252026

Who buys from TETRA TECH EC, INC.

since January 2024
1agencies
$54.4Mpaid
100.0%top buyer
Department of Defense100.0%
$54,432,420

Before 2024 only: Department of State.

The line

since January 2024
$3.7Bline value
4,163contracts
24agencies
953suppliers
46.6%held by top ten

Environmental remediation (F108)

$1.8B
$1.3B
$652M
202420252026Jan–Sep
14thof 953 suppliers
$52,798,882TETRA TECH EC, INC. in the line
1.44%share of the line
2.9%of $1,811,602,686 spent by Department of Defense

Agencies that buy the line and never bought from TETRA TECH EC, INC.

22agencies
2,692contracts
$1,835,296,753since January 2024
Environmental Protection Agency654 contracts
$1,437,102,531
Department of the Interior273 contracts
$111,540,020
Department of Transportation127 contracts
$92,806,533
Department of Energy6 contracts
$64,953,007
Department of Veterans Affairs333 contracts
$32,078,432
Department of Homeland Security215 contracts
$22,575,729
Department of Agriculture275 contracts
$21,950,131
Department of Health and Human Services89 contracts
$15,763,011
National Science Foundation3 contracts
$13,741,502
Department of Justice555 contracts
$9,743,042
Department of the Treasury21 contracts
$4,908,445
Department of Commerce53 contracts
$4,210,127
General Services Administration56 contracts
$2,943,359
Smithsonian Institution5 contracts
$413,732
National Aeronautics and Space Administration13 contracts
$182,718
Department of Housing and Urban Development3 contracts
$159,589
Department of Labor5 contracts
$147,119
National Archives and Records Administration1 contract
$31,900
Social Security Administration1 contract
$14,575
District of Columbia Courts2 contracts
$13,748
Federal Election Commission1 contract
$11,601
National Gallery of Art1 contract
$5,901

How the line is bought

by value, since 2024
19%no competition
12%one applicant
0of these to TETRA TECH EC, INC.
Competed, several suppliers applied2,229 contracts
$2,520,433,816 · 68.7%
Awarded directly, no competition1,264 contracts
$702,340,253 · 19.2%
Competed, one supplier applied670 contracts
$444,214,919 · 12.1%

Contracts reaching their end dates

Oct 2026 – October 2027
810contracts
$930,678,711end by October 2027
121end in December 2026 · $71.7M
515in agencies never served · $546M
$9.8M
$59.5M
$71.7M
$134M
$39.5M
$208M
$108M
$55.3M
$48.1M
$48.8M
$30.3M
$118M
$178K
Oct 2656 contractsNov 2663 contractsDec 26121 contractsJan 27108 contractsFeb 2757 contractsMar 27101 contractsApr 2759 contractsMay 2750 contractsJun 2754 contractsJul 2742 contractsAug 2729 contractsSep 2769 contractsOct 271 contract

Suppliers next to it in the line

since January 2024
TETRA TECH EC, INC.
$52,798,882
ONEIDA ENVIRONMENTAL, LLC2 contracts · 1 agency
$50,323,516
CONTI FEDERAL SERVICES, LLC3 contracts · 1 agency
$49,845,937
PARAGON PROFESSIONAL SERVICES LLC7 contracts · 1 agency
$48,556,179

All 953 suppliers in the line

The extract

Every buying office, every contract holder, value, number and end date behind the figures above.

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Source: USAspending.gov, U.S. Department of the Treasury, Bureau of the Fiscal Service, usaspending.gov, accessed 30 September 2026.The data is available to copy, adapt, redistribute, or otherwise use for non-commercial or for commercial purposes (USAspending.gov, Licensing); no Dun & Bradstreet data is shown.