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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov. See Terms

    Total Organic Carbon (TOC) and Dissolved Organic Carbon (DOC)

    Metadata Updated: April 12, 2026

    Total organic carbon (TOC) is the total amount of organic matter in the water, and is used to evaluate water quality. TOC concentrations are regulated by the Safe Drinking Water Act through the Long-Term 2 Enhanced Surface Water Treatment Rule and the Stage 2 Disinfectant Byproduct Rule. Both Rules identify removal requirements based on source water characteristics such as alkalinity and source water TOC levels. Generally, TOC is removed through the addition of coagulants during the flocculation and sedimentation processes and through the filtration process.

    Dissolved organic carbon (DOC) measures the total amount of organic matter that can pass through a filter no larger than 0.45 µm. Since high levels of DOC may interfere with disinfection efficiency, DOC concentrations are monitored for removal before the disinfection stage of the water treatment process.

    Both TOC and DOC are related to the formation of disinfection byproducts (DBPs). When leftover organic matter reacts with residual chlorine, DBPs may form (please see "Disinfection Byproducts (DBPs)" dataset for more information).

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. See Terms License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date May 20, 2023
    Metadata Updated Date April 12, 2026

    Metadata Source

    Harvested from Bloomington Indiana Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date May 20, 2023
    Metadata Updated Date April 12, 2026
    Publisher data.bloomington.in.gov
    Maintainer
    Identifier https://data.bloomington.in.gov/api/views/asjj-b5y6
    Data First Published 2023-03-03
    Data Last Modified 2026-04-11
    Category Utilities & Water
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.bloomington.in.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id b8f49ba9-b361-4e26-8f13-55db6d3d626b
    Harvest Source Id 59bba0d6-a855-49e0-bf4b-18a907bd3aba
    Harvest Source Title Bloomington Indiana Data.json
    Homepage URL https://data.bloomington.in.gov/d/asjj-b5y6
    License http://opendatacommons.org/licenses/pddl/1.0/
    Source Datajson Identifier True
    Source Hash 173b18df09f141ae1a3b434a6d545c79ba984e823cf8058c19505a1bf07b7f57
    Source Schema Version 1.1

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