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Residual Disinfectant Reporting for Public Water Systems

Community and nontransient noncommunity PWSs that use only purchased water or groundwater must monitor the level of disinfectant in the distribution system and report that information to the TCEQ each quarter. Forms and guidance.

All community and nontransient noncommunity public water systems (PWSs) that use only purchased water or groundwater must regularly monitor the level of disinfectant in the distribution system and use the DLQOR form to report this information to the TCEQ quarterly.

DLQOR Form

Important: Changes have been made to the DLQOR automatic data system. Email submissions are no longer accepted, however we have a new electronic reporting system known as E2.To learn more about submitting your form electronically, click here.

The electronic submission process is optional and we will continue to accept the paper form through the mail. Please use the most up to date version of the pdf form located below.

The Disinfectant Level Quarterly Operating Report (DLQOR) is available as a fill-in-the-blank PDF file. This PDF file:

RG-407, Disinfectant Reporting for Public Water Systems

Who Should Not Use DLQORs

If your PWS treats surface water or groundwater under the direct influence of surface water (GUI), do not use this form. Instead, you must submit Surface Water Monthly Operating Reports (SWMORs).

Forms and Worksheets

  • Disinfectant Level Quarterly Operating Report (DLQOR):
    PDF format
  • Important: Be sure to complete all fields, including your PWS ID number, when you fill out the DLQOR form. If your forms are not complete when we receive them, you might not receive proper credit—instead, you could receive a violation.
  • Disinfectant Residual Worksheet:
    • for PWSs with fewer than 750 customers:
      PDF · Word
    • for PWSs with 750–4900 customers:
      PDF · Word
    • for PWSs that collect samples daily:
      PDF · Word
    • for PWSs that collect these samples with their coliform samples:
      PDF · Word

Topics Under this Category

Disinfectant Residual Reporting for Public Water Systems
Shows public water systems that use only purchased water or groundwater how to comply with the disinfectant-level monitoring and reporting requirements of 30 TAC Section 290.110. Includes example calculations, worksheets, sample report, blank report form.