name: Tetra Tech Vocabulary
description: >-
  Vocabulary of domain-specific terms used in Tetra Tech engineering and
  consulting services, covering environmental science, water quality,
  infrastructure, digital analytics, and project management domains.
url: https://www.tetratech.com/
tags:
  - Analytics
  - Consulting
  - Engineering
  - Environment
  - Water
created: '2026-05-03'
modified: '2026-05-03'

terms:
  - term: Tetra Tech Delta
    definition: >-
      The brand name for Tetra Tech's suite of advanced digital solutions,
      encompassing data analytics, artificial intelligence, process automation,
      OT/IT integration, and cloud platform services. Tetra Tech Delta delivers
      transformational technology-driven solutions across environmental, water,
      infrastructure, and industrial sectors.
    tags:
      - Digital Transformation

  - term: Cosmos Platform
    definition: >-
      Tetra Tech's proprietary mobile data collection platform for field projects.
      Cosmos enables real-time data capture by field teams, project management,
      quality assurance workflows, and API/webhook-based integration with enterprise
      systems for automated data synchronization.
    tags:
      - Data Collection

  - term: baytrends
    definition: >-
      An open-source R package developed by Tetra Tech for evaluating long-term
      water quality trends using Generalized Additive Modeling (GAM). baytrends is
      used extensively for Chesapeake Bay water quality monitoring and trend analysis,
      applying statistical models to seasonal and annual water quality datasets.
    tags:
      - Water Quality
      - Open Source

  - term: WaterNet
    definition: >-
      Tetra Tech's SaaS water network management platform for utilities. WaterNet
      provides data-driven operational intelligence for water infrastructure management,
      supporting asset health analysis, leak detection, and capital planning.
    tags:
      - Water Infrastructure

  - term: Data Discovery Tool (DDT)
    definition: >-
      An open-source environmental data analysis application developed by Tetra Tech
      in partnership with USEPA. The DDT enables querying, visualization, and quality
      control of environmental monitoring datasets. The source code is available on
      the Tetra Tech GitHub organization.
    tags:
      - Environmental
      - Open Source

  - term: Electronic Data Deliverable (EDD)
    definition: >-
      A standardized electronic format for transmitting environmental analytical
      data from laboratories to project databases. Tetra Tech defines EDD formats
      for their data management systems, enabling automated ingestion of laboratory
      results into environmental databases.
    tags:
      - Environmental Data

  - term: Water Quality Parameter
    definition: >-
      A measurable chemical, physical, or biological characteristic of water used
      to assess its condition for drinking, ecological, or regulatory purposes.
      Common parameters include pH, dissolved oxygen, turbidity, nitrate, total
      phosphorus, and chlorophyll-a.
    tags:
      - Water Quality

  - term: Monitoring Station
    definition: >-
      A designated geographic location where environmental samples are collected
      or sensors are deployed for continuous measurement. Monitoring stations are
      identified by unique IDs and GPS coordinates, forming the backbone of
      environmental monitoring networks.
    tags:
      - Environmental Monitoring

  - term: GAM (Generalized Additive Model)
    definition: >-
      A statistical modeling technique used in Tetra Tech's baytrends package to
      evaluate non-linear trends in water quality time series. GAM separates
      long-term trends from seasonal variation and hydrological flow effects to
      reveal underlying water quality changes.
    tags:
      - Analytics
      - Water Quality

  - term: Leading with Science
    definition: >-
      Tetra Tech's core corporate philosophy and brand positioning, reflecting their
      commitment to applying scientific rigor and data-driven approaches to solve
      complex environmental, infrastructure, and international development challenges.
    tags:
      - Company

  - term: OT/IT Integration
    definition: >-
      The convergence of Operational Technology (OT) systems such as SCADA, DCS,
      and PLCs with Information Technology (IT) enterprise systems. Tetra Tech Delta
      and acquired firm TIGA specialize in OT/IT integration for water utilities,
      energy facilities, and industrial operations.
    tags:
      - Digital Transformation

  - term: SCADA
    definition: >-
      Supervisory Control and Data Acquisition — industrial control systems used
      by water utilities, energy companies, and industrial facilities to monitor
      and control infrastructure. Tetra Tech provides SCADA integration, cybersecurity,
      and digital transformation services for SCADA environments.
    tags:
      - Industrial

  - term: Government Services Group (GSG)
    definition: >-
      One of Tetra Tech's two primary business groups, providing consulting,
      engineering, and technology services to federal, state, and local government
      clients in the United States and internationally.
    tags:
      - Company

  - term: Commercial International Services Group (CIG)
    definition: >-
      Tetra Tech's business group serving commercial and international clients
      across environmental, water, infrastructure, and energy sectors worldwide.
    tags:
      - Company