Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
This is a Non-Federal dataset covered by different Terms of Use than See Terms

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

Metadata Updated: June 15, 2024

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 See Terms License: See this page for license information.

Downloads & Resources


Metadata Created Date May 20, 2023
Metadata Updated Date June 15, 2024

Metadata Source

Harvested from Bloomington Indiana Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date May 20, 2023
Metadata Updated Date June 15, 2024
Data First Published 2023-03-03
Data Last Modified 2024-06-13
Category Utilities & Water
Public Access Level public
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id c3e2ec89-f0fb-457d-879f-885b180b715f
Harvest Source Id 59bba0d6-a855-49e0-bf4b-18a907bd3aba
Harvest Source Title Bloomington Indiana Data.json
Homepage URL
Source Datajson Identifier True
Source Hash f2fc6438c2e6df8e904a0679edb1747820d7af4962281d12cb3a55c79d02e8f8
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.