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Operating a Surface Water Treatment Plant

The requirements to run a surface water treatment plant (SWTP) include following the rules of operation, treating water by designed disinfection, monitoring vital treatment parameters, and reporting records of operations. We provide the necessary information on these requirements to help your SWTP or your surface-water-purchased system provide safe drinking water.

Following the Rules of SWTP Operation

Publications and Guidance about Surface Water Treatment Plants
Guidance for all aspects of your surface water treatment plant from design and construction to day-to-day operation.

How to Find a Licensed Water Operator
How to use our database to find out whether an operator's certification is up to date, including current continuing education credits.

How to Find a Water Operations Company
How to use our database to find out whether a water operations company has a current registration.

Is My Public Water System Affected by the DBP2 and LT2 Rules?
Find information about implementing the DBP2 and LT2 rules for your plant by asking for help at


Treating Water by Designed Disinfection

CT Study Information
A Concentration-Time (CT) study is a formal determination of the disinfectant concentrations and the effective contact time provided by a water treatment plant. A CT study is required for each SWTP of each public water system. Find the information you need to prepare and submit a CT study.

Controlling Nitrification in Systems with Chloramines
How a public water system (PWS) can detect nitrification and prevent the degradation of drinking water quality in a water distribution system. 

Monitoring and Reporting

Monitoring and Reporting for Surface Water Systems
You must monitor your surface water system to ensure safe drinking water is provided. You must report the progress of the water treatment by your surface water treatment plant (SWTP) operations using public notifications, monitoring plans, and SWTP forms.

Lab Approval Form and Instructions
Public water systems must submit this lab form to be approved to analyze the following analytes themselves: turbidity, pH, temperature, TOC, UV, alkalinity, disinfectant, chlorite (at point of entry), calcium and/or phosphate.

Texas Optimization Program
Provides information on the requirements, benefits, and recognition of participating in the program for optimizing the operations of SWTPs.