# Ecological and Human Health Risks of Contaminants

Canonical: https://abierto.us/opportunities/68herc25r0243

- Solicitation number: 68HERC25R0243
- Notice type: Award notice (first published as presolicitation)
- Status: Awarded to Tetra Tech, Inc. for $25,000,000.00
- Department: Environmental Protection Agency
- Contracting office: Water, Tribal & Science Division (68HERW)
- NAICS: 541620 Environmental Consulting Services
- Product or service code: R499 Other Professional Services
- Place of performance: Fairfax, Virginia
- County: Fairfax County (FIPS 51059). https://abierto.us/counties/fairfax-county-va-51059
- First posted: August 18, 2025
- Last posted: April 20, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/c8d496b3395047f08914a7591d6703d1/view

## Description

R499-Ecological and Human Health Risks of Contaminants in Water, Fish and Sediments and of Microbial Pathogens in Surface Waters

## Award on USAspending

- Recipient: Tetra Tech, Inc. (UEI X38LAAB5HB64)
- Contract: 68HERW26D0007
- Obligated: $100,000.00
- Competition: Full and Open Competition, 1 offers received
- Link: award number 68HERW26D0007 equals the contract number; same awarding office 68HERW (high confidence)
- Record: https://www.usaspending.gov/award/CONT_IDV_68HERW26D0007_6800/


## Publications

- August 18, 2025: Presolicitation, due August 25, 2025 at 12:00 PM EDT. Notice f4ad15f25ff34473b31e342a19e4b186. https://sam.gov/workspace/contract/opp/f4ad15f25ff34473b31e342a19e4b186/view
- August 22, 2025: Presolicitation, due August 22, 2025 at 12:00 PM EDT. Notice 516f746982e74be18c7281e7a23ada64. https://sam.gov/workspace/contract/opp/516f746982e74be18c7281e7a23ada64/view
- September 10, 2025: Solicitation, due October 9, 2025 at 12:00 PM EDT. Notice abed00450e0c4ba8b310303c59aa9b9e. https://sam.gov/workspace/contract/opp/abed00450e0c4ba8b310303c59aa9b9e/view
- September 22, 2025: Solicitation, due October 9, 2025 at 12:00 PM EDT. Notice 4cdcc677f4ac4fffaeec1705eded2d9b. https://sam.gov/workspace/contract/opp/4cdcc677f4ac4fffaeec1705eded2d9b/view
- April 20, 2026: Award notice. Notice c8d496b3395047f08914a7591d6703d1. https://sam.gov/workspace/contract/opp/c8d496b3395047f08914a7591d6703d1/view

## Points of contact

- Loesch, Kimberly F., Loesch.Kimberly@epa.gov, 513-487-2058

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Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/68herc25r0243.