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Water: Microbial & Disinfection Byproducts Rules

MDBP Technical Guidances

Technical Guidances for Implementation of the Microbial and Disinfection Byproducts Rules

These guidance manuals support the Interim Enhanced Surface Water Treatment Rule and the Stage 1 Disinfectants/Disinfection Byproducts Rule. The manuals will aid EPA, State agencies and affected public water systems in implementing the two interrelated rules, and will help to ensure that implementation among these groups is consistent. Unless otherwise noted, files are less than 800k.

You will need Adobe Acrobat Reader to view the Adobe PDF files on this page. See EPA's PDF page for more information about getting and using the free Acrobat Reader.

Alternative Disinfectants and Oxidants Guidance Manual
    EPA 815-R-99-014, April 1999 

Complete Document (1247 kB) PDF  
  Cover, Table of Contents PDF Word
Chp. 1 Introduction PDF Word
Chp. 2 Disinfectant Use in Water Treatment PDF Word
Chp. 3 Ozone PDF Word
Chp. 4 Chlorine Dioxide PDF Word
Chp. 5 Potassium Permanganate PDF Word
Chp. 6 Chloramines PDF Word
Chp. 7 Peroxone (Ozone/Hydrogen Peroxide) PDF Word
Chp. 8 Ultraviolet Radiation PDF Word
Chp. 9 Combined Disinfectants PDF Word
App. A Summary of Disinfectant Usage in the U.S. PDF Word
App. B Selected Costs of Alternative Disinfection Systems PDF Word


Disinfection Profiling and Benchmarking Guidance Manual
    EPA-815-R-99-013, August 1999 

Errata sheet
Table of Contents
Executive Summary
1. Introduction
2. Applicability of Disinfection Profiling and Benchmarking
PDF, 84K
3. Creating a Profile: Data Requirements and Calculations PDF,830K
4. Calculating the Benchmark
5. Using the Benchmark
6. Alternative Disinfection Benchmark
7. References
PDF, 229K
Appendix A: History
Appendix B: Log Inactivation Methods
Appendis C: Ct Values for Inactivations Achieved by Various Disinfectants
Appendix D: Determination of Contact Time
Appendix E: Using the Regression Method
PDF, 634K

Enhanced Coagulation and Enhanced Precipitative Softening Guidance Manual
    EPA-815-R-99-012, May 1999 

Manual PDF, 600K

Guidance Manual for Compliance with the Interim Enhanced Surface Water Treatment Rule:  Turbidity Provisions
    EPA-815-R-99-010, April 1999 

Cover, Table of Contents PDF Word
Chp. 1 Introduction PDF Word
Chp. 2 Turbidity Requirements: IESWTR PDF Word
Chp. 3 Turbidity Methods and Measurement PDF Word
Chp. 4 Approach for Compliance PDF Word
Chp. 5 Individual Filter Self Assessment PDF Word
Chp. 6 Comprehensive Performance Evaulation PDF Word
Chp. 7 Importance of Turbidity PDF Word
Chp. 8 Particles Contributing to Turbidity PDF Word
Chp. 9 Turbidity In Source Water  PDF Word
Chp. 10 Turbidity Through the Treatment Process PDF Word
Chp. 11 Basic Turbidimeter Design and Concepts PDF Word
App. A List of Definitions PDF Word
App. B Determination of Turbidity by Nephelometry PDF Word
App. C Turbidity Standard Method PDF Word
App. D Turbidity GLI Method 2 PDF Word

Guidance Manual for Conducting Sanitary Surveys of Public Water Systems; Surface Water and Ground Water Under the Direct Influence (GWUDI)
    EPA 815-R-99-016, April 1999 

Main Report PDF, 1M Word, 7M
App. A Examples of State Sanitary Survey Checklists PDF, 2M

Pennsylvania Reference Guide for Inspecting PWSs PDF, 2M

Maryland Water Treatment Plant Inspection Report Form PDF, 846k

Massachusetts Comprehensive Compliance Evaluation - Sanitary Surveys - State 1 PDF, 2M

New York Procedures for Detailed System Evaluations of PWSs PDF, 1M

EPA Region 8 Sanitary Survey Form PDF, 1M

Microbial and Disinfection Byproduct Rules Simultaneous Compliance Guidance Manual
    EPA-815-R-99-015, August 1999

Uncovered Finished Water Reservoirs Guidance Manual
    EPA 815-R-99-011, April 1999 

Full Report PDF Word,  6M

Disinfection profile/CT spreadsheet
   April 2001

* Note to users of previous versions of the spreadsheet: Spreadsheets downloaded PRIOR to April 2001 give a divide by zero error in calculations during months with less than 31 days. It is recommended that you use the current version of the spreadsheet provided below.

  • The following Excel spreadsheets can be used to calculate a 12-month profile of Giardia or virus inactivation levels achieved with the use of Free Chlorine, Chloramines, Chlorine Dioxide, and/or Ozone. These spreadsheets begin with the month of April and end in March, as this was the regulatory timeframe for required profiling under the IESWTR. Systems which have performed one year of monitoring (April 2000 - March 2001) to comply with disinfection profiling requirements only need to use the non-leap year file. Systems which are also using historical data to create their profile will also need to use the leap year version for the April 1999 - March 2000 timeframe to account for the 29-day February in 2000. Further information on how to use the spreadsheet is provided in the file.

       (Download Excel spreadsheet)    (Download Excel spreadsheet for leap year)

    The Utah Department of Environmental Quality has also developed a spreadsheet for calculating a disinfection profile. For more information, click here. Exit EPA Disclaimer
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